From cebc19ef236aac2968d2ffccfcff9b975b63fa8d Mon Sep 17 00:00:00 2001
From: polo <ordipolo@gmx.fr>
Date: Mon, 23 Jun 2025 03:33:38 +0200
Subject: fullcalendar

---
 .../js/fullcalendar/packages/core/index.global.js  | 9929 ++++++++++++++++++++
 1 file changed, 9929 insertions(+)
 create mode 100644 public/js/fullcalendar/packages/core/index.global.js

(limited to 'public/js/fullcalendar/packages/core/index.global.js')

diff --git a/public/js/fullcalendar/packages/core/index.global.js b/public/js/fullcalendar/packages/core/index.global.js
new file mode 100644
index 0000000..5c22940
--- /dev/null
+++ b/public/js/fullcalendar/packages/core/index.global.js
@@ -0,0 +1,9929 @@
+/*!
+FullCalendar Core v6.1.17
+Docs & License: https://fullcalendar.io
+(c) 2024 Adam Shaw
+*/
+var FullCalendar = (function (exports) {
+    'use strict';
+
+    const styleTexts = [];
+    const styleEls = new Map();
+    function injectStyles(styleText) {
+        styleTexts.push(styleText);
+        styleEls.forEach((styleEl) => {
+            appendStylesTo(styleEl, styleText);
+        });
+    }
+    function ensureElHasStyles(el) {
+        if (el.isConnected && // sometimes true if SSR system simulates DOM
+            el.getRootNode // sometimes undefined if SSR system simulates DOM
+        ) {
+            registerStylesRoot(el.getRootNode());
+        }
+    }
+    function registerStylesRoot(rootNode) {
+        let styleEl = styleEls.get(rootNode);
+        if (!styleEl || !styleEl.isConnected) {
+            styleEl = rootNode.querySelector('style[data-fullcalendar]');
+            if (!styleEl) {
+                styleEl = document.createElement('style');
+                styleEl.setAttribute('data-fullcalendar', '');
+                const nonce = getNonceValue();
+                if (nonce) {
+                    styleEl.nonce = nonce;
+                }
+                const parentEl = rootNode === document ? document.head : rootNode;
+                const insertBefore = rootNode === document
+                    ? parentEl.querySelector('script,link[rel=stylesheet],link[as=style],style')
+                    : parentEl.firstChild;
+                parentEl.insertBefore(styleEl, insertBefore);
+            }
+            styleEls.set(rootNode, styleEl);
+            hydrateStylesRoot(styleEl);
+        }
+    }
+    function hydrateStylesRoot(styleEl) {
+        for (const styleText of styleTexts) {
+            appendStylesTo(styleEl, styleText);
+        }
+    }
+    function appendStylesTo(styleEl, styleText) {
+        const { sheet } = styleEl;
+        const ruleCnt = sheet.cssRules.length;
+        styleText.split('}').forEach((styleStr, i) => {
+            styleStr = styleStr.trim();
+            if (styleStr) {
+                sheet.insertRule(styleStr + '}', ruleCnt + i);
+            }
+        });
+    }
+    // nonce
+    // -------------------------------------------------------------------------------------------------
+    let queriedNonceValue;
+    function getNonceValue() {
+        if (queriedNonceValue === undefined) {
+            queriedNonceValue = queryNonceValue();
+        }
+        return queriedNonceValue;
+    }
+    /*
+    TODO: discourage meta tag and instead put nonce attribute on placeholder <style> tag
+    */
+    function queryNonceValue() {
+        const metaWithNonce = document.querySelector('meta[name="csp-nonce"]');
+        if (metaWithNonce && metaWithNonce.hasAttribute('content')) {
+            return metaWithNonce.getAttribute('content');
+        }
+        const elWithNonce = document.querySelector('script[nonce]');
+        if (elWithNonce) {
+            return elWithNonce.nonce || '';
+        }
+        return '';
+    }
+    // main
+    // -------------------------------------------------------------------------------------------------
+    if (typeof document !== 'undefined') {
+        registerStylesRoot(document);
+    }
+
+    var css_248z = ":root{--fc-small-font-size:.85em;--fc-page-bg-color:#fff;--fc-neutral-bg-color:hsla(0,0%,82%,.3);--fc-neutral-text-color:grey;--fc-border-color:#ddd;--fc-button-text-color:#fff;--fc-button-bg-color:#2c3e50;--fc-button-border-color:#2c3e50;--fc-button-hover-bg-color:#1e2b37;--fc-button-hover-border-color:#1a252f;--fc-button-active-bg-color:#1a252f;--fc-button-active-border-color:#151e27;--fc-event-bg-color:#3788d8;--fc-event-border-color:#3788d8;--fc-event-text-color:#fff;--fc-event-selected-overlay-color:rgba(0,0,0,.25);--fc-more-link-bg-color:#d0d0d0;--fc-more-link-text-color:inherit;--fc-event-resizer-thickness:8px;--fc-event-resizer-dot-total-width:8px;--fc-event-resizer-dot-border-width:1px;--fc-non-business-color:hsla(0,0%,84%,.3);--fc-bg-event-color:#8fdf82;--fc-bg-event-opacity:0.3;--fc-highlight-color:rgba(188,232,241,.3);--fc-today-bg-color:rgba(255,220,40,.15);--fc-now-indicator-color:red}.fc-not-allowed,.fc-not-allowed .fc-event{cursor:not-allowed}.fc{display:flex;flex-direction:column;font-size:1em}.fc,.fc *,.fc :after,.fc :before{box-sizing:border-box}.fc table{border-collapse:collapse;border-spacing:0;font-size:1em}.fc th{text-align:center}.fc td,.fc th{padding:0;vertical-align:top}.fc a[data-navlink]{cursor:pointer}.fc a[data-navlink]:hover{text-decoration:underline}.fc-direction-ltr{direction:ltr;text-align:left}.fc-direction-rtl{direction:rtl;text-align:right}.fc-theme-standard td,.fc-theme-standard th{border:1px solid var(--fc-border-color)}.fc-liquid-hack td,.fc-liquid-hack th{position:relative}@font-face{font-family:fcicons;font-style:normal;font-weight:400;src:url(\"data:application/x-font-ttf;charset=utf-8;base64,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\") format(\"truetype\")}.fc-icon{speak:none;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;display:inline-block;font-family:fcicons!important;font-style:normal;font-variant:normal;font-weight:400;height:1em;line-height:1;text-align:center;text-transform:none;-webkit-user-select:none;-moz-user-select:none;user-select:none;width:1em}.fc-icon-chevron-left:before{content:\"\\e900\"}.fc-icon-chevron-right:before{content:\"\\e901\"}.fc-icon-chevrons-left:before{content:\"\\e902\"}.fc-icon-chevrons-right:before{content:\"\\e903\"}.fc-icon-minus-square:before{content:\"\\e904\"}.fc-icon-plus-square:before{content:\"\\e905\"}.fc-icon-x:before{content:\"\\e906\"}.fc .fc-button{border-radius:0;font-family:inherit;font-size:inherit;line-height:inherit;margin:0;overflow:visible;text-transform:none}.fc .fc-button:focus{outline:1px dotted;outline:5px auto -webkit-focus-ring-color}.fc .fc-button{-webkit-appearance:button}.fc .fc-button:not(:disabled){cursor:pointer}.fc .fc-button{background-color:transparent;border:1px solid transparent;border-radius:.25em;display:inline-block;font-size:1em;font-weight:400;line-height:1.5;padding:.4em .65em;text-align:center;-webkit-user-select:none;-moz-user-select:none;user-select:none;vertical-align:middle}.fc .fc-button:hover{text-decoration:none}.fc .fc-button:focus{box-shadow:0 0 0 .2rem rgba(44,62,80,.25);outline:0}.fc .fc-button:disabled{opacity:.65}.fc .fc-button-primary{background-color:var(--fc-button-bg-color);border-color:var(--fc-button-border-color);color:var(--fc-button-text-color)}.fc .fc-button-primary:hover{background-color:var(--fc-button-hover-bg-color);border-color:var(--fc-button-hover-border-color);color:var(--fc-button-text-color)}.fc .fc-button-primary:disabled{background-color:var(--fc-button-bg-color);border-color:var(--fc-button-border-color);color:var(--fc-button-text-color)}.fc .fc-button-primary:focus{box-shadow:0 0 0 .2rem rgba(76,91,106,.5)}.fc .fc-button-primary:not(:disabled).fc-button-active,.fc .fc-button-primary:not(:disabled):active{background-color:var(--fc-button-active-bg-color);border-color:var(--fc-button-active-border-color);color:var(--fc-button-text-color)}.fc .fc-button-primary:not(:disabled).fc-button-active:focus,.fc .fc-button-primary:not(:disabled):active:focus{box-shadow:0 0 0 .2rem rgba(76,91,106,.5)}.fc .fc-button .fc-icon{font-size:1.5em;vertical-align:middle}.fc .fc-button-group{display:inline-flex;position:relative;vertical-align:middle}.fc .fc-button-group>.fc-button{flex:1 1 auto;position:relative}.fc .fc-button-group>.fc-button.fc-button-active,.fc .fc-button-group>.fc-button:active,.fc .fc-button-group>.fc-button:focus,.fc .fc-button-group>.fc-button:hover{z-index:1}.fc-direction-ltr .fc-button-group>.fc-button:not(:first-child){border-bottom-left-radius:0;border-top-left-radius:0;margin-left:-1px}.fc-direction-ltr .fc-button-group>.fc-button:not(:last-child){border-bottom-right-radius:0;border-top-right-radius:0}.fc-direction-rtl .fc-button-group>.fc-button:not(:first-child){border-bottom-right-radius:0;border-top-right-radius:0;margin-right:-1px}.fc-direction-rtl .fc-button-group>.fc-button:not(:last-child){border-bottom-left-radius:0;border-top-left-radius:0}.fc .fc-toolbar{align-items:center;display:flex;justify-content:space-between}.fc .fc-toolbar.fc-header-toolbar{margin-bottom:1.5em}.fc .fc-toolbar.fc-footer-toolbar{margin-top:1.5em}.fc .fc-toolbar-title{font-size:1.75em;margin:0}.fc-direction-ltr .fc-toolbar>*>:not(:first-child){margin-left:.75em}.fc-direction-rtl .fc-toolbar>*>:not(:first-child){margin-right:.75em}.fc-direction-rtl .fc-toolbar-ltr{flex-direction:row-reverse}.fc .fc-scroller{-webkit-overflow-scrolling:touch;position:relative}.fc .fc-scroller-liquid{height:100%}.fc .fc-scroller-liquid-absolute{bottom:0;left:0;position:absolute;right:0;top:0}.fc .fc-scroller-harness{direction:ltr;overflow:hidden;position:relative}.fc .fc-scroller-harness-liquid{height:100%}.fc-direction-rtl .fc-scroller-harness>.fc-scroller{direction:rtl}.fc-theme-standard .fc-scrollgrid{border:1px solid var(--fc-border-color)}.fc .fc-scrollgrid,.fc .fc-scrollgrid table{table-layout:fixed;width:100%}.fc .fc-scrollgrid table{border-left-style:hidden;border-right-style:hidden;border-top-style:hidden}.fc .fc-scrollgrid{border-bottom-width:0;border-collapse:separate;border-right-width:0}.fc .fc-scrollgrid-liquid{height:100%}.fc .fc-scrollgrid-section,.fc .fc-scrollgrid-section table,.fc .fc-scrollgrid-section>td{height:1px}.fc .fc-scrollgrid-section-liquid>td{height:100%}.fc .fc-scrollgrid-section>*{border-left-width:0;border-top-width:0}.fc .fc-scrollgrid-section-footer>*,.fc .fc-scrollgrid-section-header>*{border-bottom-width:0}.fc .fc-scrollgrid-section-body table,.fc .fc-scrollgrid-section-footer table{border-bottom-style:hidden}.fc .fc-scrollgrid-section-sticky>*{background:var(--fc-page-bg-color);position:sticky;z-index:3}.fc .fc-scrollgrid-section-header.fc-scrollgrid-section-sticky>*{top:0}.fc .fc-scrollgrid-section-footer.fc-scrollgrid-section-sticky>*{bottom:0}.fc .fc-scrollgrid-sticky-shim{height:1px;margin-bottom:-1px}.fc-sticky{position:sticky}.fc .fc-view-harness{flex-grow:1;position:relative}.fc .fc-view-harness-active>.fc-view{bottom:0;left:0;position:absolute;right:0;top:0}.fc .fc-col-header-cell-cushion{display:inline-block;padding:2px 4px}.fc .fc-bg-event,.fc .fc-highlight,.fc .fc-non-business{bottom:0;left:0;position:absolute;right:0;top:0}.fc .fc-non-business{background:var(--fc-non-business-color)}.fc .fc-bg-event{background:var(--fc-bg-event-color);opacity:var(--fc-bg-event-opacity)}.fc .fc-bg-event .fc-event-title{font-size:var(--fc-small-font-size);font-style:italic;margin:.5em}.fc .fc-highlight{background:var(--fc-highlight-color)}.fc .fc-cell-shaded,.fc .fc-day-disabled{background:var(--fc-neutral-bg-color)}a.fc-event,a.fc-event:hover{text-decoration:none}.fc-event.fc-event-draggable,.fc-event[href]{cursor:pointer}.fc-event .fc-event-main{position:relative;z-index:2}.fc-event-dragging:not(.fc-event-selected){opacity:.75}.fc-event-dragging.fc-event-selected{box-shadow:0 2px 7px rgba(0,0,0,.3)}.fc-event .fc-event-resizer{display:none;position:absolute;z-index:4}.fc-event-selected .fc-event-resizer,.fc-event:hover .fc-event-resizer{display:block}.fc-event-selected .fc-event-resizer{background:var(--fc-page-bg-color);border-color:inherit;border-radius:calc(var(--fc-event-resizer-dot-total-width)/2);border-style:solid;border-width:var(--fc-event-resizer-dot-border-width);height:var(--fc-event-resizer-dot-total-width);width:var(--fc-event-resizer-dot-total-width)}.fc-event-selected .fc-event-resizer:before{bottom:-20px;content:\"\";left:-20px;position:absolute;right:-20px;top:-20px}.fc-event-selected,.fc-event:focus{box-shadow:0 2px 5px rgba(0,0,0,.2)}.fc-event-selected:before,.fc-event:focus:before{bottom:0;content:\"\";left:0;position:absolute;right:0;top:0;z-index:3}.fc-event-selected:after,.fc-event:focus:after{background:var(--fc-event-selected-overlay-color);bottom:-1px;content:\"\";left:-1px;position:absolute;right:-1px;top:-1px;z-index:1}.fc-h-event{background-color:var(--fc-event-bg-color);border:1px solid var(--fc-event-border-color);display:block}.fc-h-event .fc-event-main{color:var(--fc-event-text-color)}.fc-h-event .fc-event-main-frame{display:flex}.fc-h-event .fc-event-time{max-width:100%;overflow:hidden}.fc-h-event .fc-event-title-container{flex-grow:1;flex-shrink:1;min-width:0}.fc-h-event .fc-event-title{display:inline-block;left:0;max-width:100%;overflow:hidden;right:0;vertical-align:top}.fc-h-event.fc-event-selected:before{bottom:-10px;top:-10px}.fc-direction-ltr .fc-daygrid-block-event:not(.fc-event-start),.fc-direction-rtl .fc-daygrid-block-event:not(.fc-event-end){border-bottom-left-radius:0;border-left-width:0;border-top-left-radius:0}.fc-direction-ltr .fc-daygrid-block-event:not(.fc-event-end),.fc-direction-rtl .fc-daygrid-block-event:not(.fc-event-start){border-bottom-right-radius:0;border-right-width:0;border-top-right-radius:0}.fc-h-event:not(.fc-event-selected) .fc-event-resizer{bottom:0;top:0;width:var(--fc-event-resizer-thickness)}.fc-direction-ltr .fc-h-event:not(.fc-event-selected) .fc-event-resizer-start,.fc-direction-rtl .fc-h-event:not(.fc-event-selected) .fc-event-resizer-end{cursor:w-resize;left:calc(var(--fc-event-resizer-thickness)*-.5)}.fc-direction-ltr .fc-h-event:not(.fc-event-selected) .fc-event-resizer-end,.fc-direction-rtl .fc-h-event:not(.fc-event-selected) .fc-event-resizer-start{cursor:e-resize;right:calc(var(--fc-event-resizer-thickness)*-.5)}.fc-h-event.fc-event-selected .fc-event-resizer{margin-top:calc(var(--fc-event-resizer-dot-total-width)*-.5);top:50%}.fc-direction-ltr .fc-h-event.fc-event-selected .fc-event-resizer-start,.fc-direction-rtl .fc-h-event.fc-event-selected .fc-event-resizer-end{left:calc(var(--fc-event-resizer-dot-total-width)*-.5)}.fc-direction-ltr .fc-h-event.fc-event-selected .fc-event-resizer-end,.fc-direction-rtl .fc-h-event.fc-event-selected .fc-event-resizer-start{right:calc(var(--fc-event-resizer-dot-total-width)*-.5)}.fc .fc-popover{box-shadow:0 2px 6px rgba(0,0,0,.15);position:absolute;z-index:9999}.fc .fc-popover-header{align-items:center;display:flex;flex-direction:row;justify-content:space-between;padding:3px 4px}.fc .fc-popover-title{margin:0 2px}.fc .fc-popover-close{cursor:pointer;font-size:1.1em;opacity:.65}.fc-theme-standard .fc-popover{background:var(--fc-page-bg-color);border:1px solid var(--fc-border-color)}.fc-theme-standard .fc-popover-header{background:var(--fc-neutral-bg-color)}";
+    injectStyles(css_248z);
+
+    function removeElement(el) {
+        if (el.parentNode) {
+            el.parentNode.removeChild(el);
+        }
+    }
+    // Querying
+    // ----------------------------------------------------------------------------------------------------------------
+    function elementClosest(el, selector) {
+        if (el.closest) {
+            return el.closest(selector);
+            // really bad fallback for IE
+            // from https://developer.mozilla.org/en-US/docs/Web/API/Element/closest
+        }
+        if (!document.documentElement.contains(el)) {
+            return null;
+        }
+        do {
+            if (elementMatches(el, selector)) {
+                return el;
+            }
+            el = (el.parentElement || el.parentNode);
+        } while (el !== null && el.nodeType === 1);
+        return null;
+    }
+    function elementMatches(el, selector) {
+        let method = el.matches || el.matchesSelector || el.msMatchesSelector;
+        return method.call(el, selector);
+    }
+    // accepts multiple subject els
+    // returns a real array. good for methods like forEach
+    // TODO: accept the document
+    function findElements(container, selector) {
+        let containers = container instanceof HTMLElement ? [container] : container;
+        let allMatches = [];
+        for (let i = 0; i < containers.length; i += 1) {
+            let matches = containers[i].querySelectorAll(selector);
+            for (let j = 0; j < matches.length; j += 1) {
+                allMatches.push(matches[j]);
+            }
+        }
+        return allMatches;
+    }
+    // accepts multiple subject els
+    // only queries direct child elements // TODO: rename to findDirectChildren!
+    function findDirectChildren(parent, selector) {
+        let parents = parent instanceof HTMLElement ? [parent] : parent;
+        let allMatches = [];
+        for (let i = 0; i < parents.length; i += 1) {
+            let childNodes = parents[i].children; // only ever elements
+            for (let j = 0; j < childNodes.length; j += 1) {
+                let childNode = childNodes[j];
+                if (!selector || elementMatches(childNode, selector)) {
+                    allMatches.push(childNode);
+                }
+            }
+        }
+        return allMatches;
+    }
+    // Style
+    // ----------------------------------------------------------------------------------------------------------------
+    const PIXEL_PROP_RE = /(top|left|right|bottom|width|height)$/i;
+    function applyStyle(el, props) {
+        for (let propName in props) {
+            applyStyleProp(el, propName, props[propName]);
+        }
+    }
+    function applyStyleProp(el, name, val) {
+        if (val == null) {
+            el.style[name] = '';
+        }
+        else if (typeof val === 'number' && PIXEL_PROP_RE.test(name)) {
+            el.style[name] = `${val}px`;
+        }
+        else {
+            el.style[name] = val;
+        }
+    }
+    // Event Handling
+    // ----------------------------------------------------------------------------------------------------------------
+    // if intercepting bubbled events at the document/window/body level,
+    // and want to see originating element (the 'target'), use this util instead
+    // of `ev.target` because it goes within web-component boundaries.
+    function getEventTargetViaRoot(ev) {
+        var _a, _b;
+        return (_b = (_a = ev.composedPath) === null || _a === void 0 ? void 0 : _a.call(ev)[0]) !== null && _b !== void 0 ? _b : ev.target;
+    }
+    // Unique ID for DOM attribute
+    let guid$1 = 0;
+    function getUniqueDomId() {
+        guid$1 += 1;
+        return 'fc-dom-' + guid$1;
+    }
+
+    // Stops a mouse/touch event from doing it's native browser action
+    function preventDefault(ev) {
+        ev.preventDefault();
+    }
+    // Event Delegation
+    // ----------------------------------------------------------------------------------------------------------------
+    function buildDelegationHandler(selector, handler) {
+        return (ev) => {
+            let matchedChild = elementClosest(ev.target, selector);
+            if (matchedChild) {
+                handler.call(matchedChild, ev, matchedChild);
+            }
+        };
+    }
+    function listenBySelector(container, eventType, selector, handler) {
+        let attachedHandler = buildDelegationHandler(selector, handler);
+        container.addEventListener(eventType, attachedHandler);
+        return () => {
+            container.removeEventListener(eventType, attachedHandler);
+        };
+    }
+    function listenToHoverBySelector(container, selector, onMouseEnter, onMouseLeave) {
+        let currentMatchedChild;
+        return listenBySelector(container, 'mouseover', selector, (mouseOverEv, matchedChild) => {
+            if (matchedChild !== currentMatchedChild) {
+                currentMatchedChild = matchedChild;
+                onMouseEnter(mouseOverEv, matchedChild);
+                let realOnMouseLeave = (mouseLeaveEv) => {
+                    currentMatchedChild = null;
+                    onMouseLeave(mouseLeaveEv, matchedChild);
+                    matchedChild.removeEventListener('mouseleave', realOnMouseLeave);
+                };
+                // listen to the next mouseleave, and then unattach
+                matchedChild.addEventListener('mouseleave', realOnMouseLeave);
+            }
+        });
+    }
+    // Animation
+    // ----------------------------------------------------------------------------------------------------------------
+    const transitionEventNames = [
+        'webkitTransitionEnd',
+        'otransitionend',
+        'oTransitionEnd',
+        'msTransitionEnd',
+        'transitionend',
+    ];
+    // triggered only when the next single subsequent transition finishes
+    function whenTransitionDone(el, callback) {
+        let realCallback = (ev) => {
+            callback(ev);
+            transitionEventNames.forEach((eventName) => {
+                el.removeEventListener(eventName, realCallback);
+            });
+        };
+        transitionEventNames.forEach((eventName) => {
+            el.addEventListener(eventName, realCallback); // cross-browser way to determine when the transition finishes
+        });
+    }
+    // ARIA workarounds
+    // ----------------------------------------------------------------------------------------------------------------
+    function createAriaClickAttrs(handler) {
+        return Object.assign({ onClick: handler }, createAriaKeyboardAttrs(handler));
+    }
+    function createAriaKeyboardAttrs(handler) {
+        return {
+            tabIndex: 0,
+            onKeyDown(ev) {
+                if (ev.key === 'Enter' || ev.key === ' ') {
+                    handler(ev);
+                    ev.preventDefault(); // if space, don't scroll down page
+                }
+            },
+        };
+    }
+
+    let guidNumber = 0;
+    function guid() {
+        guidNumber += 1;
+        return String(guidNumber);
+    }
+    /* FullCalendar-specific DOM Utilities
+    ----------------------------------------------------------------------------------------------------------------------*/
+    // Make the mouse cursor express that an event is not allowed in the current area
+    function disableCursor() {
+        document.body.classList.add('fc-not-allowed');
+    }
+    // Returns the mouse cursor to its original look
+    function enableCursor() {
+        document.body.classList.remove('fc-not-allowed');
+    }
+    /* Selection
+    ----------------------------------------------------------------------------------------------------------------------*/
+    function preventSelection(el) {
+        el.style.userSelect = 'none';
+        el.style.webkitUserSelect = 'none';
+        el.addEventListener('selectstart', preventDefault);
+    }
+    function allowSelection(el) {
+        el.style.userSelect = '';
+        el.style.webkitUserSelect = '';
+        el.removeEventListener('selectstart', preventDefault);
+    }
+    /* Context Menu
+    ----------------------------------------------------------------------------------------------------------------------*/
+    function preventContextMenu(el) {
+        el.addEventListener('contextmenu', preventDefault);
+    }
+    function allowContextMenu(el) {
+        el.removeEventListener('contextmenu', preventDefault);
+    }
+    function parseFieldSpecs(input) {
+        let specs = [];
+        let tokens = [];
+        let i;
+        let token;
+        if (typeof input === 'string') {
+            tokens = input.split(/\s*,\s*/);
+        }
+        else if (typeof input === 'function') {
+            tokens = [input];
+        }
+        else if (Array.isArray(input)) {
+            tokens = input;
+        }
+        for (i = 0; i < tokens.length; i += 1) {
+            token = tokens[i];
+            if (typeof token === 'string') {
+                specs.push(token.charAt(0) === '-' ?
+                    { field: token.substring(1), order: -1 } :
+                    { field: token, order: 1 });
+            }
+            else if (typeof token === 'function') {
+                specs.push({ func: token });
+            }
+        }
+        return specs;
+    }
+    function compareByFieldSpecs(obj0, obj1, fieldSpecs) {
+        let i;
+        let cmp;
+        for (i = 0; i < fieldSpecs.length; i += 1) {
+            cmp = compareByFieldSpec(obj0, obj1, fieldSpecs[i]);
+            if (cmp) {
+                return cmp;
+            }
+        }
+        return 0;
+    }
+    function compareByFieldSpec(obj0, obj1, fieldSpec) {
+        if (fieldSpec.func) {
+            return fieldSpec.func(obj0, obj1);
+        }
+        return flexibleCompare(obj0[fieldSpec.field], obj1[fieldSpec.field])
+            * (fieldSpec.order || 1);
+    }
+    function flexibleCompare(a, b) {
+        if (!a && !b) {
+            return 0;
+        }
+        if (b == null) {
+            return -1;
+        }
+        if (a == null) {
+            return 1;
+        }
+        if (typeof a === 'string' || typeof b === 'string') {
+            return String(a).localeCompare(String(b));
+        }
+        return a - b;
+    }
+    /* String Utilities
+    ----------------------------------------------------------------------------------------------------------------------*/
+    function padStart(val, len) {
+        let s = String(val);
+        return '000'.substr(0, len - s.length) + s;
+    }
+    function formatWithOrdinals(formatter, args, fallbackText) {
+        if (typeof formatter === 'function') {
+            return formatter(...args);
+        }
+        if (typeof formatter === 'string') { // non-blank string
+            return args.reduce((str, arg, index) => (str.replace('$' + index, arg || '')), formatter);
+        }
+        return fallbackText;
+    }
+    /* Number Utilities
+    ----------------------------------------------------------------------------------------------------------------------*/
+    function compareNumbers(a, b) {
+        return a - b;
+    }
+    function isInt(n) {
+        return n % 1 === 0;
+    }
+    /* FC-specific DOM dimension stuff
+    ----------------------------------------------------------------------------------------------------------------------*/
+    function computeSmallestCellWidth(cellEl) {
+        let allWidthEl = cellEl.querySelector('.fc-scrollgrid-shrink-frame');
+        let contentWidthEl = cellEl.querySelector('.fc-scrollgrid-shrink-cushion');
+        if (!allWidthEl) {
+            throw new Error('needs fc-scrollgrid-shrink-frame className'); // TODO: use const
+        }
+        if (!contentWidthEl) {
+            throw new Error('needs fc-scrollgrid-shrink-cushion className');
+        }
+        return cellEl.getBoundingClientRect().width - allWidthEl.getBoundingClientRect().width + // the cell padding+border
+            contentWidthEl.getBoundingClientRect().width;
+    }
+
+    const INTERNAL_UNITS = ['years', 'months', 'days', 'milliseconds'];
+    const PARSE_RE = /^(-?)(?:(\d+)\.)?(\d+):(\d\d)(?::(\d\d)(?:\.(\d\d\d))?)?/;
+    // Parsing and Creation
+    function createDuration(input, unit) {
+        if (typeof input === 'string') {
+            return parseString(input);
+        }
+        if (typeof input === 'object' && input) { // non-null object
+            return parseObject(input);
+        }
+        if (typeof input === 'number') {
+            return parseObject({ [unit || 'milliseconds']: input });
+        }
+        return null;
+    }
+    function parseString(s) {
+        let m = PARSE_RE.exec(s);
+        if (m) {
+            let sign = m[1] ? -1 : 1;
+            return {
+                years: 0,
+                months: 0,
+                days: sign * (m[2] ? parseInt(m[2], 10) : 0),
+                milliseconds: sign * ((m[3] ? parseInt(m[3], 10) : 0) * 60 * 60 * 1000 + // hours
+                    (m[4] ? parseInt(m[4], 10) : 0) * 60 * 1000 + // minutes
+                    (m[5] ? parseInt(m[5], 10) : 0) * 1000 + // seconds
+                    (m[6] ? parseInt(m[6], 10) : 0) // ms
+                ),
+            };
+        }
+        return null;
+    }
+    function parseObject(obj) {
+        let duration = {
+            years: obj.years || obj.year || 0,
+            months: obj.months || obj.month || 0,
+            days: obj.days || obj.day || 0,
+            milliseconds: (obj.hours || obj.hour || 0) * 60 * 60 * 1000 + // hours
+                (obj.minutes || obj.minute || 0) * 60 * 1000 + // minutes
+                (obj.seconds || obj.second || 0) * 1000 + // seconds
+                (obj.milliseconds || obj.millisecond || obj.ms || 0), // ms
+        };
+        let weeks = obj.weeks || obj.week;
+        if (weeks) {
+            duration.days += weeks * 7;
+            duration.specifiedWeeks = true;
+        }
+        return duration;
+    }
+    // Equality
+    function durationsEqual(d0, d1) {
+        return d0.years === d1.years &&
+            d0.months === d1.months &&
+            d0.days === d1.days &&
+            d0.milliseconds === d1.milliseconds;
+    }
+    function asCleanDays(dur) {
+        if (!dur.years && !dur.months && !dur.milliseconds) {
+            return dur.days;
+        }
+        return 0;
+    }
+    // Simple Math
+    function addDurations(d0, d1) {
+        return {
+            years: d0.years + d1.years,
+            months: d0.months + d1.months,
+            days: d0.days + d1.days,
+            milliseconds: d0.milliseconds + d1.milliseconds,
+        };
+    }
+    function subtractDurations(d1, d0) {
+        return {
+            years: d1.years - d0.years,
+            months: d1.months - d0.months,
+            days: d1.days - d0.days,
+            milliseconds: d1.milliseconds - d0.milliseconds,
+        };
+    }
+    function multiplyDuration(d, n) {
+        return {
+            years: d.years * n,
+            months: d.months * n,
+            days: d.days * n,
+            milliseconds: d.milliseconds * n,
+        };
+    }
+    // Conversions
+    // "Rough" because they are based on average-case Gregorian months/years
+    function asRoughYears(dur) {
+        return asRoughDays(dur) / 365;
+    }
+    function asRoughMonths(dur) {
+        return asRoughDays(dur) / 30;
+    }
+    function asRoughDays(dur) {
+        return asRoughMs(dur) / 864e5;
+    }
+    function asRoughMinutes(dur) {
+        return asRoughMs(dur) / (1000 * 60);
+    }
+    function asRoughSeconds(dur) {
+        return asRoughMs(dur) / 1000;
+    }
+    function asRoughMs(dur) {
+        return dur.years * (365 * 864e5) +
+            dur.months * (30 * 864e5) +
+            dur.days * 864e5 +
+            dur.milliseconds;
+    }
+    // Advanced Math
+    function wholeDivideDurations(numerator, denominator) {
+        let res = null;
+        for (let i = 0; i < INTERNAL_UNITS.length; i += 1) {
+            let unit = INTERNAL_UNITS[i];
+            if (denominator[unit]) {
+                let localRes = numerator[unit] / denominator[unit];
+                if (!isInt(localRes) || (res !== null && res !== localRes)) {
+                    return null;
+                }
+                res = localRes;
+            }
+            else if (numerator[unit]) {
+                // needs to divide by something but can't!
+                return null;
+            }
+        }
+        return res;
+    }
+    function greatestDurationDenominator(dur) {
+        let ms = dur.milliseconds;
+        if (ms) {
+            if (ms % 1000 !== 0) {
+                return { unit: 'millisecond', value: ms };
+            }
+            if (ms % (1000 * 60) !== 0) {
+                return { unit: 'second', value: ms / 1000 };
+            }
+            if (ms % (1000 * 60 * 60) !== 0) {
+                return { unit: 'minute', value: ms / (1000 * 60) };
+            }
+            if (ms) {
+                return { unit: 'hour', value: ms / (1000 * 60 * 60) };
+            }
+        }
+        if (dur.days) {
+            if (dur.specifiedWeeks && dur.days % 7 === 0) {
+                return { unit: 'week', value: dur.days / 7 };
+            }
+            return { unit: 'day', value: dur.days };
+        }
+        if (dur.months) {
+            return { unit: 'month', value: dur.months };
+        }
+        if (dur.years) {
+            return { unit: 'year', value: dur.years };
+        }
+        return { unit: 'millisecond', value: 0 };
+    }
+
+    const { hasOwnProperty } = Object.prototype;
+    // Merges an array of objects into a single object.
+    // The second argument allows for an array of property names who's object values will be merged together.
+    function mergeProps(propObjs, complexPropsMap) {
+        let dest = {};
+        if (complexPropsMap) {
+            for (let name in complexPropsMap) {
+                if (complexPropsMap[name] === isMaybeObjectsEqual) { // implies that it's object-mergeable
+                    let complexObjs = [];
+                    // collect the trailing object values, stopping when a non-object is discovered
+                    for (let i = propObjs.length - 1; i >= 0; i -= 1) {
+                        let val = propObjs[i][name];
+                        if (typeof val === 'object' && val) { // non-null object
+                            complexObjs.unshift(val);
+                        }
+                        else if (val !== undefined) {
+                            dest[name] = val; // if there were no objects, this value will be used
+                            break;
+                        }
+                    }
+                    // if the trailing values were objects, use the merged value
+                    if (complexObjs.length) {
+                        dest[name] = mergeProps(complexObjs);
+                    }
+                }
+            }
+        }
+        // copy values into the destination, going from last to first
+        for (let i = propObjs.length - 1; i >= 0; i -= 1) {
+            let props = propObjs[i];
+            for (let name in props) {
+                if (!(name in dest)) { // if already assigned by previous props or complex props, don't reassign
+                    dest[name] = props[name];
+                }
+            }
+        }
+        return dest;
+    }
+    function filterHash(hash, func) {
+        let filtered = {};
+        for (let key in hash) {
+            if (func(hash[key], key)) {
+                filtered[key] = hash[key];
+            }
+        }
+        return filtered;
+    }
+    function mapHash(hash, func) {
+        let newHash = {};
+        for (let key in hash) {
+            newHash[key] = func(hash[key], key);
+        }
+        return newHash;
+    }
+    function arrayToHash(a) {
+        let hash = {};
+        for (let item of a) {
+            hash[item] = true;
+        }
+        return hash;
+    }
+    // TODO: reassess browser support
+    // https://caniuse.com/?search=object.values
+    function hashValuesToArray(obj) {
+        let a = [];
+        for (let key in obj) {
+            a.push(obj[key]);
+        }
+        return a;
+    }
+    function isPropsEqual(obj0, obj1) {
+        if (obj0 === obj1) {
+            return true;
+        }
+        for (let key in obj0) {
+            if (hasOwnProperty.call(obj0, key)) {
+                if (!(key in obj1)) {
+                    return false;
+                }
+            }
+        }
+        for (let key in obj1) {
+            if (hasOwnProperty.call(obj1, key)) {
+                if (obj0[key] !== obj1[key]) {
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+    const HANDLER_RE = /^on[A-Z]/;
+    function isNonHandlerPropsEqual(obj0, obj1) {
+        const keys = getUnequalProps(obj0, obj1);
+        for (let key of keys) {
+            if (!HANDLER_RE.test(key)) {
+                return false;
+            }
+        }
+        return true;
+    }
+    function getUnequalProps(obj0, obj1) {
+        let keys = [];
+        for (let key in obj0) {
+            if (hasOwnProperty.call(obj0, key)) {
+                if (!(key in obj1)) {
+                    keys.push(key);
+                }
+            }
+        }
+        for (let key in obj1) {
+            if (hasOwnProperty.call(obj1, key)) {
+                if (obj0[key] !== obj1[key]) {
+                    keys.push(key);
+                }
+            }
+        }
+        return keys;
+    }
+    function compareObjs(oldProps, newProps, equalityFuncs = {}) {
+        if (oldProps === newProps) {
+            return true;
+        }
+        for (let key in newProps) {
+            if (key in oldProps && isObjValsEqual(oldProps[key], newProps[key], equalityFuncs[key])) ;
+            else {
+                return false;
+            }
+        }
+        // check for props that were omitted in the new
+        for (let key in oldProps) {
+            if (!(key in newProps)) {
+                return false;
+            }
+        }
+        return true;
+    }
+    /*
+    assumed "true" equality for handler names like "onReceiveSomething"
+    */
+    function isObjValsEqual(val0, val1, comparator) {
+        if (val0 === val1 || comparator === true) {
+            return true;
+        }
+        if (comparator) {
+            return comparator(val0, val1);
+        }
+        return false;
+    }
+    function collectFromHash(hash, startIndex = 0, endIndex, step = 1) {
+        let res = [];
+        if (endIndex == null) {
+            endIndex = Object.keys(hash).length;
+        }
+        for (let i = startIndex; i < endIndex; i += step) {
+            let val = hash[i];
+            if (val !== undefined) { // will disregard undefined for sparse arrays
+                res.push(val);
+            }
+        }
+        return res;
+    }
+
+    // TODO: new util arrayify?
+    function removeExact(array, exactVal) {
+        let removeCnt = 0;
+        let i = 0;
+        while (i < array.length) {
+            if (array[i] === exactVal) {
+                array.splice(i, 1);
+                removeCnt += 1;
+            }
+            else {
+                i += 1;
+            }
+        }
+        return removeCnt;
+    }
+    function isArraysEqual(a0, a1, equalityFunc) {
+        if (a0 === a1) {
+            return true;
+        }
+        let len = a0.length;
+        let i;
+        if (len !== a1.length) { // not array? or not same length?
+            return false;
+        }
+        for (i = 0; i < len; i += 1) {
+            if (!(equalityFunc ? equalityFunc(a0[i], a1[i]) : a0[i] === a1[i])) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    const DAY_IDS = ['sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat'];
+    // Adding
+    function addWeeks(m, n) {
+        let a = dateToUtcArray(m);
+        a[2] += n * 7;
+        return arrayToUtcDate(a);
+    }
+    function addDays(m, n) {
+        let a = dateToUtcArray(m);
+        a[2] += n;
+        return arrayToUtcDate(a);
+    }
+    function addMs(m, n) {
+        let a = dateToUtcArray(m);
+        a[6] += n;
+        return arrayToUtcDate(a);
+    }
+    // Diffing (all return floats)
+    // TODO: why not use ranges?
+    function diffWeeks(m0, m1) {
+        return diffDays(m0, m1) / 7;
+    }
+    function diffDays(m0, m1) {
+        return (m1.valueOf() - m0.valueOf()) / (1000 * 60 * 60 * 24);
+    }
+    function diffHours(m0, m1) {
+        return (m1.valueOf() - m0.valueOf()) / (1000 * 60 * 60);
+    }
+    function diffMinutes(m0, m1) {
+        return (m1.valueOf() - m0.valueOf()) / (1000 * 60);
+    }
+    function diffSeconds(m0, m1) {
+        return (m1.valueOf() - m0.valueOf()) / 1000;
+    }
+    function diffDayAndTime(m0, m1) {
+        let m0day = startOfDay(m0);
+        let m1day = startOfDay(m1);
+        return {
+            years: 0,
+            months: 0,
+            days: Math.round(diffDays(m0day, m1day)),
+            milliseconds: (m1.valueOf() - m1day.valueOf()) - (m0.valueOf() - m0day.valueOf()),
+        };
+    }
+    // Diffing Whole Units
+    function diffWholeWeeks(m0, m1) {
+        let d = diffWholeDays(m0, m1);
+        if (d !== null && d % 7 === 0) {
+            return d / 7;
+        }
+        return null;
+    }
+    function diffWholeDays(m0, m1) {
+        if (timeAsMs(m0) === timeAsMs(m1)) {
+            return Math.round(diffDays(m0, m1));
+        }
+        return null;
+    }
+    // Start-Of
+    function startOfDay(m) {
+        return arrayToUtcDate([
+            m.getUTCFullYear(),
+            m.getUTCMonth(),
+            m.getUTCDate(),
+        ]);
+    }
+    function startOfHour(m) {
+        return arrayToUtcDate([
+            m.getUTCFullYear(),
+            m.getUTCMonth(),
+            m.getUTCDate(),
+            m.getUTCHours(),
+        ]);
+    }
+    function startOfMinute(m) {
+        return arrayToUtcDate([
+            m.getUTCFullYear(),
+            m.getUTCMonth(),
+            m.getUTCDate(),
+            m.getUTCHours(),
+            m.getUTCMinutes(),
+        ]);
+    }
+    function startOfSecond(m) {
+        return arrayToUtcDate([
+            m.getUTCFullYear(),
+            m.getUTCMonth(),
+            m.getUTCDate(),
+            m.getUTCHours(),
+            m.getUTCMinutes(),
+            m.getUTCSeconds(),
+        ]);
+    }
+    // Week Computation
+    function weekOfYear(marker, dow, doy) {
+        let y = marker.getUTCFullYear();
+        let w = weekOfGivenYear(marker, y, dow, doy);
+        if (w < 1) {
+            return weekOfGivenYear(marker, y - 1, dow, doy);
+        }
+        let nextW = weekOfGivenYear(marker, y + 1, dow, doy);
+        if (nextW >= 1) {
+            return Math.min(w, nextW);
+        }
+        return w;
+    }
+    function weekOfGivenYear(marker, year, dow, doy) {
+        let firstWeekStart = arrayToUtcDate([year, 0, 1 + firstWeekOffset(year, dow, doy)]);
+        let dayStart = startOfDay(marker);
+        let days = Math.round(diffDays(firstWeekStart, dayStart));
+        return Math.floor(days / 7) + 1; // zero-indexed
+    }
+    // start-of-first-week - start-of-year
+    function firstWeekOffset(year, dow, doy) {
+        // first-week day -- which january is always in the first week (4 for iso, 1 for other)
+        let fwd = 7 + dow - doy;
+        // first-week day local weekday -- which local weekday is fwd
+        let fwdlw = (7 + arrayToUtcDate([year, 0, fwd]).getUTCDay() - dow) % 7;
+        return -fwdlw + fwd - 1;
+    }
+    // Array Conversion
+    function dateToLocalArray(date) {
+        return [
+            date.getFullYear(),
+            date.getMonth(),
+            date.getDate(),
+            date.getHours(),
+            date.getMinutes(),
+            date.getSeconds(),
+            date.getMilliseconds(),
+        ];
+    }
+    function arrayToLocalDate(a) {
+        return new Date(a[0], a[1] || 0, a[2] == null ? 1 : a[2], // day of month
+        a[3] || 0, a[4] || 0, a[5] || 0);
+    }
+    function dateToUtcArray(date) {
+        return [
+            date.getUTCFullYear(),
+            date.getUTCMonth(),
+            date.getUTCDate(),
+            date.getUTCHours(),
+            date.getUTCMinutes(),
+            date.getUTCSeconds(),
+            date.getUTCMilliseconds(),
+        ];
+    }
+    function arrayToUtcDate(a) {
+        // according to web standards (and Safari), a month index is required.
+        // massage if only given a year.
+        if (a.length === 1) {
+            a = a.concat([0]);
+        }
+        return new Date(Date.UTC(...a));
+    }
+    // Other Utils
+    function isValidDate(m) {
+        return !isNaN(m.valueOf());
+    }
+    function timeAsMs(m) {
+        return m.getUTCHours() * 1000 * 60 * 60 +
+            m.getUTCMinutes() * 1000 * 60 +
+            m.getUTCSeconds() * 1000 +
+            m.getUTCMilliseconds();
+    }
+
+    // timeZoneOffset is in minutes
+    function buildIsoString(marker, timeZoneOffset, stripZeroTime = false) {
+        let s = marker.toISOString();
+        s = s.replace('.000', '');
+        if (stripZeroTime) {
+            s = s.replace('T00:00:00Z', '');
+        }
+        if (s.length > 10) { // time part wasn't stripped, can add timezone info
+            if (timeZoneOffset == null) {
+                s = s.replace('Z', '');
+            }
+            else if (timeZoneOffset !== 0) {
+                s = s.replace('Z', formatTimeZoneOffset(timeZoneOffset, true));
+            }
+            // otherwise, its UTC-0 and we want to keep the Z
+        }
+        return s;
+    }
+    // formats the date, but with no time part
+    // TODO: somehow merge with buildIsoString and stripZeroTime
+    // TODO: rename. omit "string"
+    function formatDayString(marker) {
+        return marker.toISOString().replace(/T.*$/, '');
+    }
+    function formatIsoMonthStr(marker) {
+        return marker.toISOString().match(/^\d{4}-\d{2}/)[0];
+    }
+    // TODO: use Date::toISOString and use everything after the T?
+    function formatIsoTimeString(marker) {
+        return padStart(marker.getUTCHours(), 2) + ':' +
+            padStart(marker.getUTCMinutes(), 2) + ':' +
+            padStart(marker.getUTCSeconds(), 2);
+    }
+    function formatTimeZoneOffset(minutes, doIso = false) {
+        let sign = minutes < 0 ? '-' : '+';
+        let abs = Math.abs(minutes);
+        let hours = Math.floor(abs / 60);
+        let mins = Math.round(abs % 60);
+        if (doIso) {
+            return `${sign + padStart(hours, 2)}:${padStart(mins, 2)}`;
+        }
+        return `GMT${sign}${hours}${mins ? `:${padStart(mins, 2)}` : ''}`;
+    }
+
+    function memoize(workerFunc, resEquality, teardownFunc) {
+        let currentArgs;
+        let currentRes;
+        return function (...newArgs) {
+            if (!currentArgs) {
+                currentRes = workerFunc.apply(this, newArgs);
+            }
+            else if (!isArraysEqual(currentArgs, newArgs)) {
+                if (teardownFunc) {
+                    teardownFunc(currentRes);
+                }
+                let res = workerFunc.apply(this, newArgs);
+                if (!resEquality || !resEquality(res, currentRes)) {
+                    currentRes = res;
+                }
+            }
+            currentArgs = newArgs;
+            return currentRes;
+        };
+    }
+    function memoizeObjArg(workerFunc, resEquality, teardownFunc) {
+        let currentArg;
+        let currentRes;
+        return (newArg) => {
+            if (!currentArg) {
+                currentRes = workerFunc.call(this, newArg);
+            }
+            else if (!isPropsEqual(currentArg, newArg)) {
+                if (teardownFunc) {
+                    teardownFunc(currentRes);
+                }
+                let res = workerFunc.call(this, newArg);
+                if (!resEquality || !resEquality(res, currentRes)) {
+                    currentRes = res;
+                }
+            }
+            currentArg = newArg;
+            return currentRes;
+        };
+    }
+    function memoizeArraylike(// used at all?
+    workerFunc, resEquality, teardownFunc) {
+        let currentArgSets = [];
+        let currentResults = [];
+        return (newArgSets) => {
+            let currentLen = currentArgSets.length;
+            let newLen = newArgSets.length;
+            let i = 0;
+            for (; i < currentLen; i += 1) {
+                if (!newArgSets[i]) { // one of the old sets no longer exists
+                    if (teardownFunc) {
+                        teardownFunc(currentResults[i]);
+                    }
+                }
+                else if (!isArraysEqual(currentArgSets[i], newArgSets[i])) {
+                    if (teardownFunc) {
+                        teardownFunc(currentResults[i]);
+                    }
+                    let res = workerFunc.apply(this, newArgSets[i]);
+                    if (!resEquality || !resEquality(res, currentResults[i])) {
+                        currentResults[i] = res;
+                    }
+                }
+            }
+            for (; i < newLen; i += 1) {
+                currentResults[i] = workerFunc.apply(this, newArgSets[i]);
+            }
+            currentArgSets = newArgSets;
+            currentResults.splice(newLen); // remove excess
+            return currentResults;
+        };
+    }
+    function memoizeHashlike(workerFunc, resEquality, teardownFunc) {
+        let currentArgHash = {};
+        let currentResHash = {};
+        return (newArgHash) => {
+            let newResHash = {};
+            for (let key in newArgHash) {
+                if (!currentResHash[key]) {
+                    newResHash[key] = workerFunc.apply(this, newArgHash[key]);
+                }
+                else if (!isArraysEqual(currentArgHash[key], newArgHash[key])) {
+                    if (teardownFunc) {
+                        teardownFunc(currentResHash[key]);
+                    }
+                    let res = workerFunc.apply(this, newArgHash[key]);
+                    newResHash[key] = (resEquality && resEquality(res, currentResHash[key]))
+                        ? currentResHash[key]
+                        : res;
+                }
+                else {
+                    newResHash[key] = currentResHash[key];
+                }
+            }
+            currentArgHash = newArgHash;
+            currentResHash = newResHash;
+            return newResHash;
+        };
+    }
+
+    const EXTENDED_SETTINGS_AND_SEVERITIES = {
+        week: 3,
+        separator: 9,
+        omitZeroMinute: 9,
+        meridiem: 9,
+        omitCommas: 9,
+    };
+    const STANDARD_DATE_PROP_SEVERITIES = {
+        timeZoneName: 7,
+        era: 6,
+        year: 5,
+        month: 4,
+        day: 2,
+        weekday: 2,
+        hour: 1,
+        minute: 1,
+        second: 1,
+    };
+    const MERIDIEM_RE = /\s*([ap])\.?m\.?/i; // eats up leading spaces too
+    const COMMA_RE = /,/g; // we need re for globalness
+    const MULTI_SPACE_RE = /\s+/g;
+    const LTR_RE = /\u200e/g; // control character
+    const UTC_RE = /UTC|GMT/;
+    class NativeFormatter {
+        constructor(formatSettings) {
+            let standardDateProps = {};
+            let extendedSettings = {};
+            let smallestUnitNum = 9; // the smallest unit in the formatter (9 is a sentinel, beyond max)
+            for (let name in formatSettings) {
+                if (name in EXTENDED_SETTINGS_AND_SEVERITIES) {
+                    extendedSettings[name] = formatSettings[name];
+                    const severity = EXTENDED_SETTINGS_AND_SEVERITIES[name];
+                    if (severity < 9) {
+                        smallestUnitNum = Math.min(EXTENDED_SETTINGS_AND_SEVERITIES[name], smallestUnitNum);
+                    }
+                }
+                else {
+                    standardDateProps[name] = formatSettings[name];
+                    if (name in STANDARD_DATE_PROP_SEVERITIES) { // TODO: what about hour12? no severity
+                        smallestUnitNum = Math.min(STANDARD_DATE_PROP_SEVERITIES[name], smallestUnitNum);
+                    }
+                }
+            }
+            this.standardDateProps = standardDateProps;
+            this.extendedSettings = extendedSettings;
+            this.smallestUnitNum = smallestUnitNum;
+            this.buildFormattingFunc = memoize(buildFormattingFunc);
+        }
+        format(date, context) {
+            return this.buildFormattingFunc(this.standardDateProps, this.extendedSettings, context)(date);
+        }
+        formatRange(start, end, context, betterDefaultSeparator) {
+            let { standardDateProps, extendedSettings } = this;
+            let diffSeverity = computeMarkerDiffSeverity(start.marker, end.marker, context.calendarSystem);
+            if (!diffSeverity) {
+                return this.format(start, context);
+            }
+            let biggestUnitForPartial = diffSeverity;
+            if (biggestUnitForPartial > 1 && // the two dates are different in a way that's larger scale than time
+                (standardDateProps.year === 'numeric' || standardDateProps.year === '2-digit') &&
+                (standardDateProps.month === 'numeric' || standardDateProps.month === '2-digit') &&
+                (standardDateProps.day === 'numeric' || standardDateProps.day === '2-digit')) {
+                biggestUnitForPartial = 1; // make it look like the dates are only different in terms of time
+            }
+            let full0 = this.format(start, context);
+            let full1 = this.format(end, context);
+            if (full0 === full1) {
+                return full0;
+            }
+            let partialDateProps = computePartialFormattingOptions(standardDateProps, biggestUnitForPartial);
+            let partialFormattingFunc = buildFormattingFunc(partialDateProps, extendedSettings, context);
+            let partial0 = partialFormattingFunc(start);
+            let partial1 = partialFormattingFunc(end);
+            let insertion = findCommonInsertion(full0, partial0, full1, partial1);
+            let separator = extendedSettings.separator || betterDefaultSeparator || context.defaultSeparator || '';
+            if (insertion) {
+                return insertion.before + partial0 + separator + partial1 + insertion.after;
+            }
+            return full0 + separator + full1;
+        }
+        getSmallestUnit() {
+            switch (this.smallestUnitNum) {
+                case 7:
+                case 6:
+                case 5:
+                    return 'year';
+                case 4:
+                    return 'month';
+                case 3:
+                    return 'week';
+                case 2:
+                    return 'day';
+                default:
+                    return 'time'; // really?
+            }
+        }
+    }
+    function buildFormattingFunc(standardDateProps, extendedSettings, context) {
+        let standardDatePropCnt = Object.keys(standardDateProps).length;
+        if (standardDatePropCnt === 1 && standardDateProps.timeZoneName === 'short') {
+            return (date) => (formatTimeZoneOffset(date.timeZoneOffset));
+        }
+        if (standardDatePropCnt === 0 && extendedSettings.week) {
+            return (date) => (formatWeekNumber(context.computeWeekNumber(date.marker), context.weekText, context.weekTextLong, context.locale, extendedSettings.week));
+        }
+        return buildNativeFormattingFunc(standardDateProps, extendedSettings, context);
+    }
+    function buildNativeFormattingFunc(standardDateProps, extendedSettings, context) {
+        standardDateProps = Object.assign({}, standardDateProps); // copy
+        extendedSettings = Object.assign({}, extendedSettings); // copy
+        sanitizeSettings(standardDateProps, extendedSettings);
+        standardDateProps.timeZone = 'UTC'; // we leverage the only guaranteed timeZone for our UTC markers
+        let normalFormat = new Intl.DateTimeFormat(context.locale.codes, standardDateProps);
+        let zeroFormat; // needed?
+        if (extendedSettings.omitZeroMinute) {
+            let zeroProps = Object.assign({}, standardDateProps);
+            delete zeroProps.minute; // seconds and ms were already considered in sanitizeSettings
+            zeroFormat = new Intl.DateTimeFormat(context.locale.codes, zeroProps);
+        }
+        return (date) => {
+            let { marker } = date;
+            let format;
+            if (zeroFormat && !marker.getUTCMinutes()) {
+                format = zeroFormat;
+            }
+            else {
+                format = normalFormat;
+            }
+            let s = format.format(marker);
+            return postProcess(s, date, standardDateProps, extendedSettings, context);
+        };
+    }
+    function sanitizeSettings(standardDateProps, extendedSettings) {
+        // deal with a browser inconsistency where formatting the timezone
+        // requires that the hour/minute be present.
+        if (standardDateProps.timeZoneName) {
+            if (!standardDateProps.hour) {
+                standardDateProps.hour = '2-digit';
+            }
+            if (!standardDateProps.minute) {
+                standardDateProps.minute = '2-digit';
+            }
+        }
+        // only support short timezone names
+        if (standardDateProps.timeZoneName === 'long') {
+            standardDateProps.timeZoneName = 'short';
+        }
+        // if requesting to display seconds, MUST display minutes
+        if (extendedSettings.omitZeroMinute && (standardDateProps.second || standardDateProps.millisecond)) {
+            delete extendedSettings.omitZeroMinute;
+        }
+    }
+    function postProcess(s, date, standardDateProps, extendedSettings, context) {
+        s = s.replace(LTR_RE, ''); // remove left-to-right control chars. do first. good for other regexes
+        if (standardDateProps.timeZoneName === 'short') {
+            s = injectTzoStr(s, (context.timeZone === 'UTC' || date.timeZoneOffset == null) ?
+                'UTC' : // important to normalize for IE, which does "GMT"
+                formatTimeZoneOffset(date.timeZoneOffset));
+        }
+        if (extendedSettings.omitCommas) {
+            s = s.replace(COMMA_RE, '').trim();
+        }
+        if (extendedSettings.omitZeroMinute) {
+            s = s.replace(':00', ''); // zeroFormat doesn't always achieve this
+        }
+        // ^ do anything that might create adjacent spaces before this point,
+        // because MERIDIEM_RE likes to eat up loading spaces
+        if (extendedSettings.meridiem === false) {
+            s = s.replace(MERIDIEM_RE, '').trim();
+        }
+        else if (extendedSettings.meridiem === 'narrow') { // a/p
+            s = s.replace(MERIDIEM_RE, (m0, m1) => m1.toLocaleLowerCase());
+        }
+        else if (extendedSettings.meridiem === 'short') { // am/pm
+            s = s.replace(MERIDIEM_RE, (m0, m1) => `${m1.toLocaleLowerCase()}m`);
+        }
+        else if (extendedSettings.meridiem === 'lowercase') { // other meridiem transformers already converted to lowercase
+            s = s.replace(MERIDIEM_RE, (m0) => m0.toLocaleLowerCase());
+        }
+        s = s.replace(MULTI_SPACE_RE, ' ');
+        s = s.trim();
+        return s;
+    }
+    function injectTzoStr(s, tzoStr) {
+        let replaced = false;
+        s = s.replace(UTC_RE, () => {
+            replaced = true;
+            return tzoStr;
+        });
+        // IE11 doesn't include UTC/GMT in the original string, so append to end
+        if (!replaced) {
+            s += ` ${tzoStr}`;
+        }
+        return s;
+    }
+    function formatWeekNumber(num, weekText, weekTextLong, locale, display) {
+        let parts = [];
+        if (display === 'long') {
+            parts.push(weekTextLong);
+        }
+        else if (display === 'short' || display === 'narrow') {
+            parts.push(weekText);
+        }
+        if (display === 'long' || display === 'short') {
+            parts.push(' ');
+        }
+        parts.push(locale.simpleNumberFormat.format(num));
+        if (locale.options.direction === 'rtl') { // TODO: use control characters instead?
+            parts.reverse();
+        }
+        return parts.join('');
+    }
+    // Range Formatting Utils
+    // 0 = exactly the same
+    // 1 = different by time
+    // and bigger
+    function computeMarkerDiffSeverity(d0, d1, ca) {
+        if (ca.getMarkerYear(d0) !== ca.getMarkerYear(d1)) {
+            return 5;
+        }
+        if (ca.getMarkerMonth(d0) !== ca.getMarkerMonth(d1)) {
+            return 4;
+        }
+        if (ca.getMarkerDay(d0) !== ca.getMarkerDay(d1)) {
+            return 2;
+        }
+        if (timeAsMs(d0) !== timeAsMs(d1)) {
+            return 1;
+        }
+        return 0;
+    }
+    function computePartialFormattingOptions(options, biggestUnit) {
+        let partialOptions = {};
+        for (let name in options) {
+            if (!(name in STANDARD_DATE_PROP_SEVERITIES) || // not a date part prop (like timeZone)
+                STANDARD_DATE_PROP_SEVERITIES[name] <= biggestUnit) {
+                partialOptions[name] = options[name];
+            }
+        }
+        return partialOptions;
+    }
+    function findCommonInsertion(full0, partial0, full1, partial1) {
+        let i0 = 0;
+        while (i0 < full0.length) {
+            let found0 = full0.indexOf(partial0, i0);
+            if (found0 === -1) {
+                break;
+            }
+            let before0 = full0.substr(0, found0);
+            i0 = found0 + partial0.length;
+            let after0 = full0.substr(i0);
+            let i1 = 0;
+            while (i1 < full1.length) {
+                let found1 = full1.indexOf(partial1, i1);
+                if (found1 === -1) {
+                    break;
+                }
+                let before1 = full1.substr(0, found1);
+                i1 = found1 + partial1.length;
+                let after1 = full1.substr(i1);
+                if (before0 === before1 && after0 === after1) {
+                    return {
+                        before: before0,
+                        after: after0,
+                    };
+                }
+            }
+        }
+        return null;
+    }
+
+    function expandZonedMarker(dateInfo, calendarSystem) {
+        let a = calendarSystem.markerToArray(dateInfo.marker);
+        return {
+            marker: dateInfo.marker,
+            timeZoneOffset: dateInfo.timeZoneOffset,
+            array: a,
+            year: a[0],
+            month: a[1],
+            day: a[2],
+            hour: a[3],
+            minute: a[4],
+            second: a[5],
+            millisecond: a[6],
+        };
+    }
+
+    function createVerboseFormattingArg(start, end, context, betterDefaultSeparator) {
+        let startInfo = expandZonedMarker(start, context.calendarSystem);
+        let endInfo = end ? expandZonedMarker(end, context.calendarSystem) : null;
+        return {
+            date: startInfo,
+            start: startInfo,
+            end: endInfo,
+            timeZone: context.timeZone,
+            localeCodes: context.locale.codes,
+            defaultSeparator: betterDefaultSeparator || context.defaultSeparator,
+        };
+    }
+
+    /*
+    TODO: fix the terminology of "formatter" vs "formatting func"
+    */
+    /*
+    At the time of instantiation, this object does not know which cmd-formatting system it will use.
+    It receives this at the time of formatting, as a setting.
+    */
+    class CmdFormatter {
+        constructor(cmdStr) {
+            this.cmdStr = cmdStr;
+        }
+        format(date, context, betterDefaultSeparator) {
+            return context.cmdFormatter(this.cmdStr, createVerboseFormattingArg(date, null, context, betterDefaultSeparator));
+        }
+        formatRange(start, end, context, betterDefaultSeparator) {
+            return context.cmdFormatter(this.cmdStr, createVerboseFormattingArg(start, end, context, betterDefaultSeparator));
+        }
+    }
+
+    class FuncFormatter {
+        constructor(func) {
+            this.func = func;
+        }
+        format(date, context, betterDefaultSeparator) {
+            return this.func(createVerboseFormattingArg(date, null, context, betterDefaultSeparator));
+        }
+        formatRange(start, end, context, betterDefaultSeparator) {
+            return this.func(createVerboseFormattingArg(start, end, context, betterDefaultSeparator));
+        }
+    }
+
+    function createFormatter(input) {
+        if (typeof input === 'object' && input) { // non-null object
+            return new NativeFormatter(input);
+        }
+        if (typeof input === 'string') {
+            return new CmdFormatter(input);
+        }
+        if (typeof input === 'function') {
+            return new FuncFormatter(input);
+        }
+        return null;
+    }
+
+    // base options
+    // ------------
+    const BASE_OPTION_REFINERS = {
+        navLinkDayClick: identity,
+        navLinkWeekClick: identity,
+        duration: createDuration,
+        bootstrapFontAwesome: identity,
+        buttonIcons: identity,
+        customButtons: identity,
+        defaultAllDayEventDuration: createDuration,
+        defaultTimedEventDuration: createDuration,
+        nextDayThreshold: createDuration,
+        scrollTime: createDuration,
+        scrollTimeReset: Boolean,
+        slotMinTime: createDuration,
+        slotMaxTime: createDuration,
+        dayPopoverFormat: createFormatter,
+        slotDuration: createDuration,
+        snapDuration: createDuration,
+        headerToolbar: identity,
+        footerToolbar: identity,
+        defaultRangeSeparator: String,
+        titleRangeSeparator: String,
+        forceEventDuration: Boolean,
+        dayHeaders: Boolean,
+        dayHeaderFormat: createFormatter,
+        dayHeaderClassNames: identity,
+        dayHeaderContent: identity,
+        dayHeaderDidMount: identity,
+        dayHeaderWillUnmount: identity,
+        dayCellClassNames: identity,
+        dayCellContent: identity,
+        dayCellDidMount: identity,
+        dayCellWillUnmount: identity,
+        initialView: String,
+        aspectRatio: Number,
+        weekends: Boolean,
+        weekNumberCalculation: identity,
+        weekNumbers: Boolean,
+        weekNumberClassNames: identity,
+        weekNumberContent: identity,
+        weekNumberDidMount: identity,
+        weekNumberWillUnmount: identity,
+        editable: Boolean,
+        viewClassNames: identity,
+        viewDidMount: identity,
+        viewWillUnmount: identity,
+        nowIndicator: Boolean,
+        nowIndicatorClassNames: identity,
+        nowIndicatorContent: identity,
+        nowIndicatorDidMount: identity,
+        nowIndicatorWillUnmount: identity,
+        showNonCurrentDates: Boolean,
+        lazyFetching: Boolean,
+        startParam: String,
+        endParam: String,
+        timeZoneParam: String,
+        timeZone: String,
+        locales: identity,
+        locale: identity,
+        themeSystem: String,
+        dragRevertDuration: Number,
+        dragScroll: Boolean,
+        allDayMaintainDuration: Boolean,
+        unselectAuto: Boolean,
+        dropAccept: identity,
+        eventOrder: parseFieldSpecs,
+        eventOrderStrict: Boolean,
+        handleWindowResize: Boolean,
+        windowResizeDelay: Number,
+        longPressDelay: Number,
+        eventDragMinDistance: Number,
+        expandRows: Boolean,
+        height: identity,
+        contentHeight: identity,
+        direction: String,
+        weekNumberFormat: createFormatter,
+        eventResizableFromStart: Boolean,
+        displayEventTime: Boolean,
+        displayEventEnd: Boolean,
+        weekText: String,
+        weekTextLong: String,
+        progressiveEventRendering: Boolean,
+        businessHours: identity,
+        initialDate: identity,
+        now: identity,
+        eventDataTransform: identity,
+        stickyHeaderDates: identity,
+        stickyFooterScrollbar: identity,
+        viewHeight: identity,
+        defaultAllDay: Boolean,
+        eventSourceFailure: identity,
+        eventSourceSuccess: identity,
+        eventDisplay: String,
+        eventStartEditable: Boolean,
+        eventDurationEditable: Boolean,
+        eventOverlap: identity,
+        eventConstraint: identity,
+        eventAllow: identity,
+        eventBackgroundColor: String,
+        eventBorderColor: String,
+        eventTextColor: String,
+        eventColor: String,
+        eventClassNames: identity,
+        eventContent: identity,
+        eventDidMount: identity,
+        eventWillUnmount: identity,
+        selectConstraint: identity,
+        selectOverlap: identity,
+        selectAllow: identity,
+        droppable: Boolean,
+        unselectCancel: String,
+        slotLabelFormat: identity,
+        slotLaneClassNames: identity,
+        slotLaneContent: identity,
+        slotLaneDidMount: identity,
+        slotLaneWillUnmount: identity,
+        slotLabelClassNames: identity,
+        slotLabelContent: identity,
+        slotLabelDidMount: identity,
+        slotLabelWillUnmount: identity,
+        dayMaxEvents: identity,
+        dayMaxEventRows: identity,
+        dayMinWidth: Number,
+        slotLabelInterval: createDuration,
+        allDayText: String,
+        allDayClassNames: identity,
+        allDayContent: identity,
+        allDayDidMount: identity,
+        allDayWillUnmount: identity,
+        slotMinWidth: Number,
+        navLinks: Boolean,
+        eventTimeFormat: createFormatter,
+        rerenderDelay: Number,
+        moreLinkText: identity,
+        moreLinkHint: identity,
+        selectMinDistance: Number,
+        selectable: Boolean,
+        selectLongPressDelay: Number,
+        eventLongPressDelay: Number,
+        selectMirror: Boolean,
+        eventMaxStack: Number,
+        eventMinHeight: Number,
+        eventMinWidth: Number,
+        eventShortHeight: Number,
+        slotEventOverlap: Boolean,
+        plugins: identity,
+        firstDay: Number,
+        dayCount: Number,
+        dateAlignment: String,
+        dateIncrement: createDuration,
+        hiddenDays: identity,
+        fixedWeekCount: Boolean,
+        validRange: identity,
+        visibleRange: identity,
+        titleFormat: identity,
+        eventInteractive: Boolean,
+        // only used by list-view, but languages define the value, so we need it in base options
+        noEventsText: String,
+        viewHint: identity,
+        navLinkHint: identity,
+        closeHint: String,
+        timeHint: String,
+        eventHint: String,
+        moreLinkClick: identity,
+        moreLinkClassNames: identity,
+        moreLinkContent: identity,
+        moreLinkDidMount: identity,
+        moreLinkWillUnmount: identity,
+        monthStartFormat: createFormatter,
+        // for connectors
+        // (can't be part of plugin system b/c must be provided at runtime)
+        handleCustomRendering: identity,
+        customRenderingMetaMap: identity,
+        customRenderingReplaces: Boolean,
+    };
+    // do NOT give a type here. need `typeof BASE_OPTION_DEFAULTS` to give real results.
+    // raw values.
+    const BASE_OPTION_DEFAULTS = {
+        eventDisplay: 'auto',
+        defaultRangeSeparator: ' - ',
+        titleRangeSeparator: ' \u2013 ',
+        defaultTimedEventDuration: '01:00:00',
+        defaultAllDayEventDuration: { day: 1 },
+        forceEventDuration: false,
+        nextDayThreshold: '00:00:00',
+        dayHeaders: true,
+        initialView: '',
+        aspectRatio: 1.35,
+        headerToolbar: {
+            start: 'title',
+            center: '',
+            end: 'today prev,next',
+        },
+        weekends: true,
+        weekNumbers: false,
+        weekNumberCalculation: 'local',
+        editable: false,
+        nowIndicator: false,
+        scrollTime: '06:00:00',
+        scrollTimeReset: true,
+        slotMinTime: '00:00:00',
+        slotMaxTime: '24:00:00',
+        showNonCurrentDates: true,
+        lazyFetching: true,
+        startParam: 'start',
+        endParam: 'end',
+        timeZoneParam: 'timeZone',
+        timeZone: 'local',
+        locales: [],
+        locale: '',
+        themeSystem: 'standard',
+        dragRevertDuration: 500,
+        dragScroll: true,
+        allDayMaintainDuration: false,
+        unselectAuto: true,
+        dropAccept: '*',
+        eventOrder: 'start,-duration,allDay,title',
+        dayPopoverFormat: { month: 'long', day: 'numeric', year: 'numeric' },
+        handleWindowResize: true,
+        windowResizeDelay: 100,
+        longPressDelay: 1000,
+        eventDragMinDistance: 5,
+        expandRows: false,
+        navLinks: false,
+        selectable: false,
+        eventMinHeight: 15,
+        eventMinWidth: 30,
+        eventShortHeight: 30,
+        monthStartFormat: { month: 'long', day: 'numeric' },
+    };
+    // calendar listeners
+    // ------------------
+    const CALENDAR_LISTENER_REFINERS = {
+        datesSet: identity,
+        eventsSet: identity,
+        eventAdd: identity,
+        eventChange: identity,
+        eventRemove: identity,
+        windowResize: identity,
+        eventClick: identity,
+        eventMouseEnter: identity,
+        eventMouseLeave: identity,
+        select: identity,
+        unselect: identity,
+        loading: identity,
+        // internal
+        _unmount: identity,
+        _beforeprint: identity,
+        _afterprint: identity,
+        _noEventDrop: identity,
+        _noEventResize: identity,
+        _resize: identity,
+        _scrollRequest: identity,
+    };
+    // calendar-specific options
+    // -------------------------
+    const CALENDAR_OPTION_REFINERS = {
+        buttonText: identity,
+        buttonHints: identity,
+        views: identity,
+        plugins: identity,
+        initialEvents: identity,
+        events: identity,
+        eventSources: identity,
+    };
+    const COMPLEX_OPTION_COMPARATORS = {
+        headerToolbar: isMaybeObjectsEqual,
+        footerToolbar: isMaybeObjectsEqual,
+        buttonText: isMaybeObjectsEqual,
+        buttonHints: isMaybeObjectsEqual,
+        buttonIcons: isMaybeObjectsEqual,
+        dateIncrement: isMaybeObjectsEqual,
+        plugins: isMaybeArraysEqual,
+        events: isMaybeArraysEqual,
+        eventSources: isMaybeArraysEqual,
+        ['resources']: isMaybeArraysEqual,
+    };
+    function isMaybeObjectsEqual(a, b) {
+        if (typeof a === 'object' && typeof b === 'object' && a && b) { // both non-null objects
+            return isPropsEqual(a, b);
+        }
+        return a === b;
+    }
+    function isMaybeArraysEqual(a, b) {
+        if (Array.isArray(a) && Array.isArray(b)) {
+            return isArraysEqual(a, b);
+        }
+        return a === b;
+    }
+    // view-specific options
+    // ---------------------
+    const VIEW_OPTION_REFINERS = {
+        type: String,
+        component: identity,
+        buttonText: String,
+        buttonTextKey: String,
+        dateProfileGeneratorClass: identity,
+        usesMinMaxTime: Boolean,
+        classNames: identity,
+        content: identity,
+        didMount: identity,
+        willUnmount: identity,
+    };
+    // util funcs
+    // ----------------------------------------------------------------------------------------------------
+    function mergeRawOptions(optionSets) {
+        return mergeProps(optionSets, COMPLEX_OPTION_COMPARATORS);
+    }
+    function refineProps(input, refiners) {
+        let refined = {};
+        let extra = {};
+        for (let propName in refiners) {
+            if (propName in input) {
+                refined[propName] = refiners[propName](input[propName]);
+            }
+        }
+        for (let propName in input) {
+            if (!(propName in refiners)) {
+                extra[propName] = input[propName];
+            }
+        }
+        return { refined, extra };
+    }
+    function identity(raw) {
+        return raw;
+    }
+
+    function createEventInstance(defId, range, forcedStartTzo, forcedEndTzo) {
+        return {
+            instanceId: guid(),
+            defId,
+            range,
+            forcedStartTzo: forcedStartTzo == null ? null : forcedStartTzo,
+            forcedEndTzo: forcedEndTzo == null ? null : forcedEndTzo,
+        };
+    }
+
+    function parseRecurring(refined, defaultAllDay, dateEnv, recurringTypes) {
+        for (let i = 0; i < recurringTypes.length; i += 1) {
+            let parsed = recurringTypes[i].parse(refined, dateEnv);
+            if (parsed) {
+                let { allDay } = refined;
+                if (allDay == null) {
+                    allDay = defaultAllDay;
+                    if (allDay == null) {
+                        allDay = parsed.allDayGuess;
+                        if (allDay == null) {
+                            allDay = false;
+                        }
+                    }
+                }
+                return {
+                    allDay,
+                    duration: parsed.duration,
+                    typeData: parsed.typeData,
+                    typeId: i,
+                };
+            }
+        }
+        return null;
+    }
+    function expandRecurring(eventStore, framingRange, context) {
+        let { dateEnv, pluginHooks, options } = context;
+        let { defs, instances } = eventStore;
+        // remove existing recurring instances
+        // TODO: bad. always expand events as a second step
+        instances = filterHash(instances, (instance) => !defs[instance.defId].recurringDef);
+        for (let defId in defs) {
+            let def = defs[defId];
+            if (def.recurringDef) {
+                let { duration } = def.recurringDef;
+                if (!duration) {
+                    duration = def.allDay ?
+                        options.defaultAllDayEventDuration :
+                        options.defaultTimedEventDuration;
+                }
+                let starts = expandRecurringRanges(def, duration, framingRange, dateEnv, pluginHooks.recurringTypes);
+                for (let start of starts) {
+                    let instance = createEventInstance(defId, {
+                        start,
+                        end: dateEnv.add(start, duration),
+                    });
+                    instances[instance.instanceId] = instance;
+                }
+            }
+        }
+        return { defs, instances };
+    }
+    /*
+    Event MUST have a recurringDef
+    */
+    function expandRecurringRanges(eventDef, duration, framingRange, dateEnv, recurringTypes) {
+        let typeDef = recurringTypes[eventDef.recurringDef.typeId];
+        let markers = typeDef.expand(eventDef.recurringDef.typeData, {
+            start: dateEnv.subtract(framingRange.start, duration),
+            end: framingRange.end,
+        }, dateEnv);
+        // the recurrence plugins don't guarantee that all-day events are start-of-day, so we have to
+        if (eventDef.allDay) {
+            markers = markers.map(startOfDay);
+        }
+        return markers;
+    }
+
+    function parseEvents(rawEvents, eventSource, context, allowOpenRange, defIdMap, instanceIdMap) {
+        let eventStore = createEmptyEventStore();
+        let eventRefiners = buildEventRefiners(context);
+        for (let rawEvent of rawEvents) {
+            let tuple = parseEvent(rawEvent, eventSource, context, allowOpenRange, eventRefiners, defIdMap, instanceIdMap);
+            if (tuple) {
+                eventTupleToStore(tuple, eventStore);
+            }
+        }
+        return eventStore;
+    }
+    function eventTupleToStore(tuple, eventStore = createEmptyEventStore()) {
+        eventStore.defs[tuple.def.defId] = tuple.def;
+        if (tuple.instance) {
+            eventStore.instances[tuple.instance.instanceId] = tuple.instance;
+        }
+        return eventStore;
+    }
+    // retrieves events that have the same groupId as the instance specified by `instanceId`
+    // or they are the same as the instance.
+    // why might instanceId not be in the store? an event from another calendar?
+    function getRelevantEvents(eventStore, instanceId) {
+        let instance = eventStore.instances[instanceId];
+        if (instance) {
+            let def = eventStore.defs[instance.defId];
+            // get events/instances with same group
+            let newStore = filterEventStoreDefs(eventStore, (lookDef) => isEventDefsGrouped(def, lookDef));
+            // add the original
+            // TODO: wish we could use eventTupleToStore or something like it
+            newStore.defs[def.defId] = def;
+            newStore.instances[instance.instanceId] = instance;
+            return newStore;
+        }
+        return createEmptyEventStore();
+    }
+    function isEventDefsGrouped(def0, def1) {
+        return Boolean(def0.groupId && def0.groupId === def1.groupId);
+    }
+    function createEmptyEventStore() {
+        return { defs: {}, instances: {} };
+    }
+    function mergeEventStores(store0, store1) {
+        return {
+            defs: Object.assign(Object.assign({}, store0.defs), store1.defs),
+            instances: Object.assign(Object.assign({}, store0.instances), store1.instances),
+        };
+    }
+    function filterEventStoreDefs(eventStore, filterFunc) {
+        let defs = filterHash(eventStore.defs, filterFunc);
+        let instances = filterHash(eventStore.instances, (instance) => (defs[instance.defId] // still exists?
+        ));
+        return { defs, instances };
+    }
+    function excludeSubEventStore(master, sub) {
+        let { defs, instances } = master;
+        let filteredDefs = {};
+        let filteredInstances = {};
+        for (let defId in defs) {
+            if (!sub.defs[defId]) { // not explicitly excluded
+                filteredDefs[defId] = defs[defId];
+            }
+        }
+        for (let instanceId in instances) {
+            if (!sub.instances[instanceId] && // not explicitly excluded
+                filteredDefs[instances[instanceId].defId] // def wasn't filtered away
+            ) {
+                filteredInstances[instanceId] = instances[instanceId];
+            }
+        }
+        return {
+            defs: filteredDefs,
+            instances: filteredInstances,
+        };
+    }
+
+    function normalizeConstraint(input, context) {
+        if (Array.isArray(input)) {
+            return parseEvents(input, null, context, true); // allowOpenRange=true
+        }
+        if (typeof input === 'object' && input) { // non-null object
+            return parseEvents([input], null, context, true); // allowOpenRange=true
+        }
+        if (input != null) {
+            return String(input);
+        }
+        return null;
+    }
+
+    function parseClassNames(raw) {
+        if (Array.isArray(raw)) {
+            return raw;
+        }
+        if (typeof raw === 'string') {
+            return raw.split(/\s+/);
+        }
+        return [];
+    }
+
+    // TODO: better called "EventSettings" or "EventConfig"
+    // TODO: move this file into structs
+    // TODO: separate constraint/overlap/allow, because selection uses only that, not other props
+    const EVENT_UI_REFINERS = {
+        display: String,
+        editable: Boolean,
+        startEditable: Boolean,
+        durationEditable: Boolean,
+        constraint: identity,
+        overlap: identity,
+        allow: identity,
+        className: parseClassNames,
+        classNames: parseClassNames,
+        color: String,
+        backgroundColor: String,
+        borderColor: String,
+        textColor: String,
+    };
+    const EMPTY_EVENT_UI = {
+        display: null,
+        startEditable: null,
+        durationEditable: null,
+        constraints: [],
+        overlap: null,
+        allows: [],
+        backgroundColor: '',
+        borderColor: '',
+        textColor: '',
+        classNames: [],
+    };
+    function createEventUi(refined, context) {
+        let constraint = normalizeConstraint(refined.constraint, context);
+        return {
+            display: refined.display || null,
+            startEditable: refined.startEditable != null ? refined.startEditable : refined.editable,
+            durationEditable: refined.durationEditable != null ? refined.durationEditable : refined.editable,
+            constraints: constraint != null ? [constraint] : [],
+            overlap: refined.overlap != null ? refined.overlap : null,
+            allows: refined.allow != null ? [refined.allow] : [],
+            backgroundColor: refined.backgroundColor || refined.color || '',
+            borderColor: refined.borderColor || refined.color || '',
+            textColor: refined.textColor || '',
+            classNames: (refined.className || []).concat(refined.classNames || []), // join singular and plural
+        };
+    }
+    // TODO: prevent against problems with <2 args!
+    function combineEventUis(uis) {
+        return uis.reduce(combineTwoEventUis, EMPTY_EVENT_UI);
+    }
+    function combineTwoEventUis(item0, item1) {
+        return {
+            display: item1.display != null ? item1.display : item0.display,
+            startEditable: item1.startEditable != null ? item1.startEditable : item0.startEditable,
+            durationEditable: item1.durationEditable != null ? item1.durationEditable : item0.durationEditable,
+            constraints: item0.constraints.concat(item1.constraints),
+            overlap: typeof item1.overlap === 'boolean' ? item1.overlap : item0.overlap,
+            allows: item0.allows.concat(item1.allows),
+            backgroundColor: item1.backgroundColor || item0.backgroundColor,
+            borderColor: item1.borderColor || item0.borderColor,
+            textColor: item1.textColor || item0.textColor,
+            classNames: item0.classNames.concat(item1.classNames),
+        };
+    }
+
+    const EVENT_NON_DATE_REFINERS = {
+        id: String,
+        groupId: String,
+        title: String,
+        url: String,
+        interactive: Boolean,
+    };
+    const EVENT_DATE_REFINERS = {
+        start: identity,
+        end: identity,
+        date: identity,
+        allDay: Boolean,
+    };
+    const EVENT_REFINERS = Object.assign(Object.assign(Object.assign({}, EVENT_NON_DATE_REFINERS), EVENT_DATE_REFINERS), { extendedProps: identity });
+    function parseEvent(raw, eventSource, context, allowOpenRange, refiners = buildEventRefiners(context), defIdMap, instanceIdMap) {
+        let { refined, extra } = refineEventDef(raw, context, refiners);
+        let defaultAllDay = computeIsDefaultAllDay(eventSource, context);
+        let recurringRes = parseRecurring(refined, defaultAllDay, context.dateEnv, context.pluginHooks.recurringTypes);
+        if (recurringRes) {
+            let def = parseEventDef(refined, extra, eventSource ? eventSource.sourceId : '', recurringRes.allDay, Boolean(recurringRes.duration), context, defIdMap);
+            def.recurringDef = {
+                typeId: recurringRes.typeId,
+                typeData: recurringRes.typeData,
+                duration: recurringRes.duration,
+            };
+            return { def, instance: null };
+        }
+        let singleRes = parseSingle(refined, defaultAllDay, context, allowOpenRange);
+        if (singleRes) {
+            let def = parseEventDef(refined, extra, eventSource ? eventSource.sourceId : '', singleRes.allDay, singleRes.hasEnd, context, defIdMap);
+            let instance = createEventInstance(def.defId, singleRes.range, singleRes.forcedStartTzo, singleRes.forcedEndTzo);
+            if (instanceIdMap && def.publicId && instanceIdMap[def.publicId]) {
+                instance.instanceId = instanceIdMap[def.publicId];
+            }
+            return { def, instance };
+        }
+        return null;
+    }
+    function refineEventDef(raw, context, refiners = buildEventRefiners(context)) {
+        return refineProps(raw, refiners);
+    }
+    function buildEventRefiners(context) {
+        return Object.assign(Object.assign(Object.assign({}, EVENT_UI_REFINERS), EVENT_REFINERS), context.pluginHooks.eventRefiners);
+    }
+    /*
+    Will NOT populate extendedProps with the leftover properties.
+    Will NOT populate date-related props.
+    */
+    function parseEventDef(refined, extra, sourceId, allDay, hasEnd, context, defIdMap) {
+        let def = {
+            title: refined.title || '',
+            groupId: refined.groupId || '',
+            publicId: refined.id || '',
+            url: refined.url || '',
+            recurringDef: null,
+            defId: ((defIdMap && refined.id) ? defIdMap[refined.id] : '') || guid(),
+            sourceId,
+            allDay,
+            hasEnd,
+            interactive: refined.interactive,
+            ui: createEventUi(refined, context),
+            extendedProps: Object.assign(Object.assign({}, (refined.extendedProps || {})), extra),
+        };
+        for (let memberAdder of context.pluginHooks.eventDefMemberAdders) {
+            Object.assign(def, memberAdder(refined));
+        }
+        // help out EventImpl from having user modify props
+        Object.freeze(def.ui.classNames);
+        Object.freeze(def.extendedProps);
+        return def;
+    }
+    function parseSingle(refined, defaultAllDay, context, allowOpenRange) {
+        let { allDay } = refined;
+        let startMeta;
+        let startMarker = null;
+        let hasEnd = false;
+        let endMeta;
+        let endMarker = null;
+        let startInput = refined.start != null ? refined.start : refined.date;
+        startMeta = context.dateEnv.createMarkerMeta(startInput);
+        if (startMeta) {
+            startMarker = startMeta.marker;
+        }
+        else if (!allowOpenRange) {
+            return null;
+        }
+        if (refined.end != null) {
+            endMeta = context.dateEnv.createMarkerMeta(refined.end);
+        }
+        if (allDay == null) {
+            if (defaultAllDay != null) {
+                allDay = defaultAllDay;
+            }
+            else {
+                // fall back to the date props LAST
+                allDay = (!startMeta || startMeta.isTimeUnspecified) &&
+                    (!endMeta || endMeta.isTimeUnspecified);
+            }
+        }
+        if (allDay && startMarker) {
+            startMarker = startOfDay(startMarker);
+        }
+        if (endMeta) {
+            endMarker = endMeta.marker;
+            if (allDay) {
+                endMarker = startOfDay(endMarker);
+            }
+            if (startMarker && endMarker <= startMarker) {
+                endMarker = null;
+            }
+        }
+        if (endMarker) {
+            hasEnd = true;
+        }
+        else if (!allowOpenRange) {
+            hasEnd = context.options.forceEventDuration || false;
+            endMarker = context.dateEnv.add(startMarker, allDay ?
+                context.options.defaultAllDayEventDuration :
+                context.options.defaultTimedEventDuration);
+        }
+        return {
+            allDay,
+            hasEnd,
+            range: { start: startMarker, end: endMarker },
+            forcedStartTzo: startMeta ? startMeta.forcedTzo : null,
+            forcedEndTzo: endMeta ? endMeta.forcedTzo : null,
+        };
+    }
+    function computeIsDefaultAllDay(eventSource, context) {
+        let res = null;
+        if (eventSource) {
+            res = eventSource.defaultAllDay;
+        }
+        if (res == null) {
+            res = context.options.defaultAllDay;
+        }
+        return res;
+    }
+
+    const DEF_DEFAULTS = {
+        startTime: '09:00',
+        endTime: '17:00',
+        daysOfWeek: [1, 2, 3, 4, 5],
+        display: 'inverse-background',
+        classNames: 'fc-non-business',
+        groupId: '_businessHours', // so multiple defs get grouped
+    };
+    /*
+    TODO: pass around as EventDefHash!!!
+    */
+    function parseBusinessHours(input, context) {
+        return parseEvents(refineInputs(input), null, context);
+    }
+    function refineInputs(input) {
+        let rawDefs;
+        if (input === true) {
+            rawDefs = [{}]; // will get DEF_DEFAULTS verbatim
+        }
+        else if (Array.isArray(input)) {
+            // if specifying an array, every sub-definition NEEDS a day-of-week
+            rawDefs = input.filter((rawDef) => rawDef.daysOfWeek);
+        }
+        else if (typeof input === 'object' && input) { // non-null object
+            rawDefs = [input];
+        }
+        else { // is probably false
+            rawDefs = [];
+        }
+        rawDefs = rawDefs.map((rawDef) => (Object.assign(Object.assign({}, DEF_DEFAULTS), rawDef)));
+        return rawDefs;
+    }
+
+    /* Date stuff that doesn't belong in datelib core
+    ----------------------------------------------------------------------------------------------------------------------*/
+    // given a timed range, computes an all-day range that has the same exact duration,
+    // but whose start time is aligned with the start of the day.
+    function computeAlignedDayRange(timedRange) {
+        let dayCnt = Math.floor(diffDays(timedRange.start, timedRange.end)) || 1;
+        let start = startOfDay(timedRange.start);
+        let end = addDays(start, dayCnt);
+        return { start, end };
+    }
+    // given a timed range, computes an all-day range based on how for the end date bleeds into the next day
+    // TODO: give nextDayThreshold a default arg
+    function computeVisibleDayRange(timedRange, nextDayThreshold = createDuration(0)) {
+        let startDay = null;
+        let endDay = null;
+        if (timedRange.end) {
+            endDay = startOfDay(timedRange.end);
+            let endTimeMS = timedRange.end.valueOf() - endDay.valueOf(); // # of milliseconds into `endDay`
+            // If the end time is actually inclusively part of the next day and is equal to or
+            // beyond the next day threshold, adjust the end to be the exclusive end of `endDay`.
+            // Otherwise, leaving it as inclusive will cause it to exclude `endDay`.
+            if (endTimeMS && endTimeMS >= asRoughMs(nextDayThreshold)) {
+                endDay = addDays(endDay, 1);
+            }
+        }
+        if (timedRange.start) {
+            startDay = startOfDay(timedRange.start); // the beginning of the day the range starts
+            // If end is within `startDay` but not past nextDayThreshold, assign the default duration of one day.
+            if (endDay && endDay <= startDay) {
+                endDay = addDays(startDay, 1);
+            }
+        }
+        return { start: startDay, end: endDay };
+    }
+    // spans from one day into another?
+    function isMultiDayRange(range) {
+        let visibleRange = computeVisibleDayRange(range);
+        return diffDays(visibleRange.start, visibleRange.end) > 1;
+    }
+    function diffDates(date0, date1, dateEnv, largeUnit) {
+        if (largeUnit === 'year') {
+            return createDuration(dateEnv.diffWholeYears(date0, date1), 'year');
+        }
+        if (largeUnit === 'month') {
+            return createDuration(dateEnv.diffWholeMonths(date0, date1), 'month');
+        }
+        return diffDayAndTime(date0, date1); // returns a duration
+    }
+
+    function pointInsideRect(point, rect) {
+        return point.left >= rect.left &&
+            point.left < rect.right &&
+            point.top >= rect.top &&
+            point.top < rect.bottom;
+    }
+    // Returns a new rectangle that is the intersection of the two rectangles. If they don't intersect, returns false
+    function intersectRects(rect1, rect2) {
+        let res = {
+            left: Math.max(rect1.left, rect2.left),
+            right: Math.min(rect1.right, rect2.right),
+            top: Math.max(rect1.top, rect2.top),
+            bottom: Math.min(rect1.bottom, rect2.bottom),
+        };
+        if (res.left < res.right && res.top < res.bottom) {
+            return res;
+        }
+        return false;
+    }
+    function translateRect(rect, deltaX, deltaY) {
+        return {
+            left: rect.left + deltaX,
+            right: rect.right + deltaX,
+            top: rect.top + deltaY,
+            bottom: rect.bottom + deltaY,
+        };
+    }
+    // Returns a new point that will have been moved to reside within the given rectangle
+    function constrainPoint(point, rect) {
+        return {
+            left: Math.min(Math.max(point.left, rect.left), rect.right),
+            top: Math.min(Math.max(point.top, rect.top), rect.bottom),
+        };
+    }
+    // Returns a point that is the center of the given rectangle
+    function getRectCenter(rect) {
+        return {
+            left: (rect.left + rect.right) / 2,
+            top: (rect.top + rect.bottom) / 2,
+        };
+    }
+    // Subtracts point2's coordinates from point1's coordinates, returning a delta
+    function diffPoints(point1, point2) {
+        return {
+            left: point1.left - point2.left,
+            top: point1.top - point2.top,
+        };
+    }
+
+    let canVGrowWithinCell;
+    function getCanVGrowWithinCell() {
+        if (canVGrowWithinCell == null) {
+            canVGrowWithinCell = computeCanVGrowWithinCell();
+        }
+        return canVGrowWithinCell;
+    }
+    function computeCanVGrowWithinCell() {
+        // for SSR, because this function is call immediately at top-level
+        // TODO: just make this logic execute top-level, immediately, instead of doing lazily
+        if (typeof document === 'undefined') {
+            return true;
+        }
+        let el = document.createElement('div');
+        el.style.position = 'absolute';
+        el.style.top = '0px';
+        el.style.left = '0px';
+        el.innerHTML = '<table><tr><td><div></div></td></tr></table>';
+        el.querySelector('table').style.height = '100px';
+        el.querySelector('div').style.height = '100%';
+        document.body.appendChild(el);
+        let div = el.querySelector('div');
+        let possible = div.offsetHeight > 0;
+        document.body.removeChild(el);
+        return possible;
+    }
+
+    const EMPTY_EVENT_STORE = createEmptyEventStore(); // for purecomponents. TODO: keep elsewhere
+    class Splitter {
+        constructor() {
+            this.getKeysForEventDefs = memoize(this._getKeysForEventDefs);
+            this.splitDateSelection = memoize(this._splitDateSpan);
+            this.splitEventStore = memoize(this._splitEventStore);
+            this.splitIndividualUi = memoize(this._splitIndividualUi);
+            this.splitEventDrag = memoize(this._splitInteraction);
+            this.splitEventResize = memoize(this._splitInteraction);
+            this.eventUiBuilders = {}; // TODO: typescript protection
+        }
+        splitProps(props) {
+            let keyInfos = this.getKeyInfo(props);
+            let defKeys = this.getKeysForEventDefs(props.eventStore);
+            let dateSelections = this.splitDateSelection(props.dateSelection);
+            let individualUi = this.splitIndividualUi(props.eventUiBases, defKeys); // the individual *bases*
+            let eventStores = this.splitEventStore(props.eventStore, defKeys);
+            let eventDrags = this.splitEventDrag(props.eventDrag);
+            let eventResizes = this.splitEventResize(props.eventResize);
+            let splitProps = {};
+            this.eventUiBuilders = mapHash(keyInfos, (info, key) => this.eventUiBuilders[key] || memoize(buildEventUiForKey));
+            for (let key in keyInfos) {
+                let keyInfo = keyInfos[key];
+                let eventStore = eventStores[key] || EMPTY_EVENT_STORE;
+                let buildEventUi = this.eventUiBuilders[key];
+                splitProps[key] = {
+                    businessHours: keyInfo.businessHours || props.businessHours,
+                    dateSelection: dateSelections[key] || null,
+                    eventStore,
+                    eventUiBases: buildEventUi(props.eventUiBases[''], keyInfo.ui, individualUi[key]),
+                    eventSelection: eventStore.instances[props.eventSelection] ? props.eventSelection : '',
+                    eventDrag: eventDrags[key] || null,
+                    eventResize: eventResizes[key] || null,
+                };
+            }
+            return splitProps;
+        }
+        _splitDateSpan(dateSpan) {
+            let dateSpans = {};
+            if (dateSpan) {
+                let keys = this.getKeysForDateSpan(dateSpan);
+                for (let key of keys) {
+                    dateSpans[key] = dateSpan;
+                }
+            }
+            return dateSpans;
+        }
+        _getKeysForEventDefs(eventStore) {
+            return mapHash(eventStore.defs, (eventDef) => this.getKeysForEventDef(eventDef));
+        }
+        _splitEventStore(eventStore, defKeys) {
+            let { defs, instances } = eventStore;
+            let splitStores = {};
+            for (let defId in defs) {
+                for (let key of defKeys[defId]) {
+                    if (!splitStores[key]) {
+                        splitStores[key] = createEmptyEventStore();
+                    }
+                    splitStores[key].defs[defId] = defs[defId];
+                }
+            }
+            for (let instanceId in instances) {
+                let instance = instances[instanceId];
+                for (let key of defKeys[instance.defId]) {
+                    if (splitStores[key]) { // must have already been created
+                        splitStores[key].instances[instanceId] = instance;
+                    }
+                }
+            }
+            return splitStores;
+        }
+        _splitIndividualUi(eventUiBases, defKeys) {
+            let splitHashes = {};
+            for (let defId in eventUiBases) {
+                if (defId) { // not the '' key
+                    for (let key of defKeys[defId]) {
+                        if (!splitHashes[key]) {
+                            splitHashes[key] = {};
+                        }
+                        splitHashes[key][defId] = eventUiBases[defId];
+                    }
+                }
+            }
+            return splitHashes;
+        }
+        _splitInteraction(interaction) {
+            let splitStates = {};
+            if (interaction) {
+                let affectedStores = this._splitEventStore(interaction.affectedEvents, this._getKeysForEventDefs(interaction.affectedEvents));
+                // can't rely on defKeys because event data is mutated
+                let mutatedKeysByDefId = this._getKeysForEventDefs(interaction.mutatedEvents);
+                let mutatedStores = this._splitEventStore(interaction.mutatedEvents, mutatedKeysByDefId);
+                let populate = (key) => {
+                    if (!splitStates[key]) {
+                        splitStates[key] = {
+                            affectedEvents: affectedStores[key] || EMPTY_EVENT_STORE,
+                            mutatedEvents: mutatedStores[key] || EMPTY_EVENT_STORE,
+                            isEvent: interaction.isEvent,
+                        };
+                    }
+                };
+                for (let key in affectedStores) {
+                    populate(key);
+                }
+                for (let key in mutatedStores) {
+                    populate(key);
+                }
+            }
+            return splitStates;
+        }
+    }
+    function buildEventUiForKey(allUi, eventUiForKey, individualUi) {
+        let baseParts = [];
+        if (allUi) {
+            baseParts.push(allUi);
+        }
+        if (eventUiForKey) {
+            baseParts.push(eventUiForKey);
+        }
+        let stuff = {
+            '': combineEventUis(baseParts),
+        };
+        if (individualUi) {
+            Object.assign(stuff, individualUi);
+        }
+        return stuff;
+    }
+
+    function parseRange(input, dateEnv) {
+        let start = null;
+        let end = null;
+        if (input.start) {
+            start = dateEnv.createMarker(input.start);
+        }
+        if (input.end) {
+            end = dateEnv.createMarker(input.end);
+        }
+        if (!start && !end) {
+            return null;
+        }
+        if (start && end && end < start) {
+            return null;
+        }
+        return { start, end };
+    }
+    // SIDE-EFFECT: will mutate ranges.
+    // Will return a new array result.
+    function invertRanges(ranges, constraintRange) {
+        let invertedRanges = [];
+        let { start } = constraintRange; // the end of the previous range. the start of the new range
+        let i;
+        let dateRange;
+        // ranges need to be in order. required for our date-walking algorithm
+        ranges.sort(compareRanges);
+        for (i = 0; i < ranges.length; i += 1) {
+            dateRange = ranges[i];
+            // add the span of time before the event (if there is any)
+            if (dateRange.start > start) { // compare millisecond time (skip any ambig logic)
+                invertedRanges.push({ start, end: dateRange.start });
+            }
+            if (dateRange.end > start) {
+                start = dateRange.end;
+            }
+        }
+        // add the span of time after the last event (if there is any)
+        if (start < constraintRange.end) { // compare millisecond time (skip any ambig logic)
+            invertedRanges.push({ start, end: constraintRange.end });
+        }
+        return invertedRanges;
+    }
+    function compareRanges(range0, range1) {
+        return range0.start.valueOf() - range1.start.valueOf(); // earlier ranges go first
+    }
+    function intersectRanges(range0, range1) {
+        let { start, end } = range0;
+        let newRange = null;
+        if (range1.start !== null) {
+            if (start === null) {
+                start = range1.start;
+            }
+            else {
+                start = new Date(Math.max(start.valueOf(), range1.start.valueOf()));
+            }
+        }
+        if (range1.end != null) {
+            if (end === null) {
+                end = range1.end;
+            }
+            else {
+                end = new Date(Math.min(end.valueOf(), range1.end.valueOf()));
+            }
+        }
+        if (start === null || end === null || start < end) {
+            newRange = { start, end };
+        }
+        return newRange;
+    }
+    function rangesEqual(range0, range1) {
+        return (range0.start === null ? null : range0.start.valueOf()) === (range1.start === null ? null : range1.start.valueOf()) &&
+            (range0.end === null ? null : range0.end.valueOf()) === (range1.end === null ? null : range1.end.valueOf());
+    }
+    function rangesIntersect(range0, range1) {
+        return (range0.end === null || range1.start === null || range0.end > range1.start) &&
+            (range0.start === null || range1.end === null || range0.start < range1.end);
+    }
+    function rangeContainsRange(outerRange, innerRange) {
+        return (outerRange.start === null || (innerRange.start !== null && innerRange.start >= outerRange.start)) &&
+            (outerRange.end === null || (innerRange.end !== null && innerRange.end <= outerRange.end));
+    }
+    function rangeContainsMarker(range, date) {
+        return (range.start === null || date >= range.start) &&
+            (range.end === null || date < range.end);
+    }
+    // If the given date is not within the given range, move it inside.
+    // (If it's past the end, make it one millisecond before the end).
+    function constrainMarkerToRange(date, range) {
+        if (range.start != null && date < range.start) {
+            return range.start;
+        }
+        if (range.end != null && date >= range.end) {
+            return new Date(range.end.valueOf() - 1);
+        }
+        return date;
+    }
+
+    function getDateMeta(date, todayRange, nowDate, dateProfile) {
+        return {
+            dow: date.getUTCDay(),
+            isDisabled: Boolean(dateProfile && (!dateProfile.activeRange || !rangeContainsMarker(dateProfile.activeRange, date))),
+            isOther: Boolean(dateProfile && !rangeContainsMarker(dateProfile.currentRange, date)),
+            isToday: Boolean(todayRange && rangeContainsMarker(todayRange, date)),
+            isPast: Boolean(nowDate ? (date < nowDate) : todayRange ? (date < todayRange.start) : false),
+            isFuture: Boolean(nowDate ? (date > nowDate) : todayRange ? (date >= todayRange.end) : false),
+        };
+    }
+    function getDayClassNames(meta, theme) {
+        let classNames = [
+            'fc-day',
+            `fc-day-${DAY_IDS[meta.dow]}`,
+        ];
+        if (meta.isDisabled) {
+            classNames.push('fc-day-disabled');
+        }
+        else {
+            if (meta.isToday) {
+                classNames.push('fc-day-today');
+                classNames.push(theme.getClass('today'));
+            }
+            if (meta.isPast) {
+                classNames.push('fc-day-past');
+            }
+            if (meta.isFuture) {
+                classNames.push('fc-day-future');
+            }
+            if (meta.isOther) {
+                classNames.push('fc-day-other');
+            }
+        }
+        return classNames;
+    }
+    function getSlotClassNames(meta, theme) {
+        let classNames = [
+            'fc-slot',
+            `fc-slot-${DAY_IDS[meta.dow]}`,
+        ];
+        if (meta.isDisabled) {
+            classNames.push('fc-slot-disabled');
+        }
+        else {
+            if (meta.isToday) {
+                classNames.push('fc-slot-today');
+                classNames.push(theme.getClass('today'));
+            }
+            if (meta.isPast) {
+                classNames.push('fc-slot-past');
+            }
+            if (meta.isFuture) {
+                classNames.push('fc-slot-future');
+            }
+        }
+        return classNames;
+    }
+
+    const DAY_FORMAT = createFormatter({ year: 'numeric', month: 'long', day: 'numeric' });
+    const WEEK_FORMAT = createFormatter({ week: 'long' });
+    function buildNavLinkAttrs(context, dateMarker, viewType = 'day', isTabbable = true) {
+        const { dateEnv, options, calendarApi } = context;
+        let dateStr = dateEnv.format(dateMarker, viewType === 'week' ? WEEK_FORMAT : DAY_FORMAT);
+        if (options.navLinks) {
+            let zonedDate = dateEnv.toDate(dateMarker);
+            const handleInteraction = (ev) => {
+                let customAction = viewType === 'day' ? options.navLinkDayClick :
+                    viewType === 'week' ? options.navLinkWeekClick : null;
+                if (typeof customAction === 'function') {
+                    customAction.call(calendarApi, dateEnv.toDate(dateMarker), ev);
+                }
+                else {
+                    if (typeof customAction === 'string') {
+                        viewType = customAction;
+                    }
+                    calendarApi.zoomTo(dateMarker, viewType);
+                }
+            };
+            return Object.assign({ title: formatWithOrdinals(options.navLinkHint, [dateStr, zonedDate], dateStr), 'data-navlink': '' }, (isTabbable
+                ? createAriaClickAttrs(handleInteraction)
+                : { onClick: handleInteraction }));
+        }
+        return { 'aria-label': dateStr };
+    }
+
+    let _isRtlScrollbarOnLeft = null;
+    function getIsRtlScrollbarOnLeft() {
+        if (_isRtlScrollbarOnLeft === null) {
+            _isRtlScrollbarOnLeft = computeIsRtlScrollbarOnLeft();
+        }
+        return _isRtlScrollbarOnLeft;
+    }
+    function computeIsRtlScrollbarOnLeft() {
+        let outerEl = document.createElement('div');
+        applyStyle(outerEl, {
+            position: 'absolute',
+            top: -1000,
+            left: 0,
+            border: 0,
+            padding: 0,
+            overflow: 'scroll',
+            direction: 'rtl',
+        });
+        outerEl.innerHTML = '<div></div>';
+        document.body.appendChild(outerEl);
+        let innerEl = outerEl.firstChild;
+        let res = innerEl.getBoundingClientRect().left > outerEl.getBoundingClientRect().left;
+        removeElement(outerEl);
+        return res;
+    }
+
+    let _scrollbarWidths;
+    function getScrollbarWidths() {
+        if (!_scrollbarWidths) {
+            _scrollbarWidths = computeScrollbarWidths();
+        }
+        return _scrollbarWidths;
+    }
+    function computeScrollbarWidths() {
+        let el = document.createElement('div');
+        el.style.overflow = 'scroll';
+        el.style.position = 'absolute';
+        el.style.top = '-9999px';
+        el.style.left = '-9999px';
+        document.body.appendChild(el);
+        let res = computeScrollbarWidthsForEl(el);
+        document.body.removeChild(el);
+        return res;
+    }
+    // WARNING: will include border
+    function computeScrollbarWidthsForEl(el) {
+        return {
+            x: el.offsetHeight - el.clientHeight,
+            y: el.offsetWidth - el.clientWidth,
+        };
+    }
+
+    function computeEdges(el, getPadding = false) {
+        let computedStyle = window.getComputedStyle(el);
+        let borderLeft = parseInt(computedStyle.borderLeftWidth, 10) || 0;
+        let borderRight = parseInt(computedStyle.borderRightWidth, 10) || 0;
+        let borderTop = parseInt(computedStyle.borderTopWidth, 10) || 0;
+        let borderBottom = parseInt(computedStyle.borderBottomWidth, 10) || 0;
+        let badScrollbarWidths = computeScrollbarWidthsForEl(el); // includes border!
+        let scrollbarLeftRight = badScrollbarWidths.y - borderLeft - borderRight;
+        let scrollbarBottom = badScrollbarWidths.x - borderTop - borderBottom;
+        let res = {
+            borderLeft,
+            borderRight,
+            borderTop,
+            borderBottom,
+            scrollbarBottom,
+            scrollbarLeft: 0,
+            scrollbarRight: 0,
+        };
+        if (getIsRtlScrollbarOnLeft() && computedStyle.direction === 'rtl') { // is the scrollbar on the left side?
+            res.scrollbarLeft = scrollbarLeftRight;
+        }
+        else {
+            res.scrollbarRight = scrollbarLeftRight;
+        }
+        if (getPadding) {
+            res.paddingLeft = parseInt(computedStyle.paddingLeft, 10) || 0;
+            res.paddingRight = parseInt(computedStyle.paddingRight, 10) || 0;
+            res.paddingTop = parseInt(computedStyle.paddingTop, 10) || 0;
+            res.paddingBottom = parseInt(computedStyle.paddingBottom, 10) || 0;
+        }
+        return res;
+    }
+    function computeInnerRect(el, goWithinPadding = false, doFromWindowViewport) {
+        let outerRect = doFromWindowViewport ? el.getBoundingClientRect() : computeRect(el);
+        let edges = computeEdges(el, goWithinPadding);
+        let res = {
+            left: outerRect.left + edges.borderLeft + edges.scrollbarLeft,
+            right: outerRect.right - edges.borderRight - edges.scrollbarRight,
+            top: outerRect.top + edges.borderTop,
+            bottom: outerRect.bottom - edges.borderBottom - edges.scrollbarBottom,
+        };
+        if (goWithinPadding) {
+            res.left += edges.paddingLeft;
+            res.right -= edges.paddingRight;
+            res.top += edges.paddingTop;
+            res.bottom -= edges.paddingBottom;
+        }
+        return res;
+    }
+    function computeRect(el) {
+        let rect = el.getBoundingClientRect();
+        return {
+            left: rect.left + window.scrollX,
+            top: rect.top + window.scrollY,
+            right: rect.right + window.scrollX,
+            bottom: rect.bottom + window.scrollY,
+        };
+    }
+    function computeClippedClientRect(el) {
+        let clippingParents = getClippingParents(el);
+        let rect = el.getBoundingClientRect();
+        for (let clippingParent of clippingParents) {
+            let intersection = intersectRects(rect, clippingParent.getBoundingClientRect());
+            if (intersection) {
+                rect = intersection;
+            }
+            else {
+                return null;
+            }
+        }
+        return rect;
+    }
+    // does not return window
+    function getClippingParents(el) {
+        let parents = [];
+        while (el instanceof HTMLElement) { // will stop when gets to document or null
+            let computedStyle = window.getComputedStyle(el);
+            if (computedStyle.position === 'fixed') {
+                break;
+            }
+            if ((/(auto|scroll)/).test(computedStyle.overflow + computedStyle.overflowY + computedStyle.overflowX)) {
+                parents.push(el);
+            }
+            el = el.parentNode;
+        }
+        return parents;
+    }
+
+    /*
+    given a function that resolves a result asynchronously.
+    the function can either call passed-in success and failure callbacks,
+    or it can return a promise.
+    if you need to pass additional params to func, bind them first.
+    */
+    function unpromisify(func, normalizedSuccessCallback, normalizedFailureCallback) {
+        // guard against success/failure callbacks being called more than once
+        // and guard against a promise AND callback being used together.
+        let isResolved = false;
+        let wrappedSuccess = function (res) {
+            if (!isResolved) {
+                isResolved = true;
+                normalizedSuccessCallback(res);
+            }
+        };
+        let wrappedFailure = function (error) {
+            if (!isResolved) {
+                isResolved = true;
+                normalizedFailureCallback(error);
+            }
+        };
+        let res = func(wrappedSuccess, wrappedFailure);
+        if (res && typeof res.then === 'function') {
+            res.then(wrappedSuccess, wrappedFailure);
+        }
+    }
+
+    class Emitter {
+        constructor() {
+            this.handlers = {};
+            this.thisContext = null;
+        }
+        setThisContext(thisContext) {
+            this.thisContext = thisContext;
+        }
+        setOptions(options) {
+            this.options = options;
+        }
+        on(type, handler) {
+            addToHash(this.handlers, type, handler);
+        }
+        off(type, handler) {
+            removeFromHash(this.handlers, type, handler);
+        }
+        trigger(type, ...args) {
+            let attachedHandlers = this.handlers[type] || [];
+            let optionHandler = this.options && this.options[type];
+            let handlers = [].concat(optionHandler || [], attachedHandlers);
+            for (let handler of handlers) {
+                handler.apply(this.thisContext, args);
+            }
+        }
+        hasHandlers(type) {
+            return Boolean((this.handlers[type] && this.handlers[type].length) ||
+                (this.options && this.options[type]));
+        }
+    }
+    function addToHash(hash, type, handler) {
+        (hash[type] || (hash[type] = []))
+            .push(handler);
+    }
+    function removeFromHash(hash, type, handler) {
+        if (handler) {
+            if (hash[type]) {
+                hash[type] = hash[type].filter((func) => func !== handler);
+            }
+        }
+        else {
+            delete hash[type]; // remove all handler funcs for this type
+        }
+    }
+
+    /*
+    Records offset information for a set of elements, relative to an origin element.
+    Can record the left/right OR the top/bottom OR both.
+    Provides methods for querying the cache by position.
+    */
+    class PositionCache {
+        constructor(originEl, els, isHorizontal, isVertical) {
+            this.els = els;
+            let originClientRect = this.originClientRect = originEl.getBoundingClientRect(); // relative to viewport top-left
+            if (isHorizontal) {
+                this.buildElHorizontals(originClientRect.left);
+            }
+            if (isVertical) {
+                this.buildElVerticals(originClientRect.top);
+            }
+        }
+        // Populates the left/right internal coordinate arrays
+        buildElHorizontals(originClientLeft) {
+            let lefts = [];
+            let rights = [];
+            for (let el of this.els) {
+                let rect = el.getBoundingClientRect();
+                lefts.push(rect.left - originClientLeft);
+                rights.push(rect.right - originClientLeft);
+            }
+            this.lefts = lefts;
+            this.rights = rights;
+        }
+        // Populates the top/bottom internal coordinate arrays
+        buildElVerticals(originClientTop) {
+            let tops = [];
+            let bottoms = [];
+            for (let el of this.els) {
+                let rect = el.getBoundingClientRect();
+                tops.push(rect.top - originClientTop);
+                bottoms.push(rect.bottom - originClientTop);
+            }
+            this.tops = tops;
+            this.bottoms = bottoms;
+        }
+        // Given a left offset (from document left), returns the index of the el that it horizontally intersects.
+        // If no intersection is made, returns undefined.
+        leftToIndex(leftPosition) {
+            let { lefts, rights } = this;
+            let len = lefts.length;
+            let i;
+            for (i = 0; i < len; i += 1) {
+                if (leftPosition >= lefts[i] && leftPosition < rights[i]) {
+                    return i;
+                }
+            }
+            return undefined; // TODO: better
+        }
+        // Given a top offset (from document top), returns the index of the el that it vertically intersects.
+        // If no intersection is made, returns undefined.
+        topToIndex(topPosition) {
+            let { tops, bottoms } = this;
+            let len = tops.length;
+            let i;
+            for (i = 0; i < len; i += 1) {
+                if (topPosition >= tops[i] && topPosition < bottoms[i]) {
+                    return i;
+                }
+            }
+            return undefined; // TODO: better
+        }
+        // Gets the width of the element at the given index
+        getWidth(leftIndex) {
+            return this.rights[leftIndex] - this.lefts[leftIndex];
+        }
+        // Gets the height of the element at the given index
+        getHeight(topIndex) {
+            return this.bottoms[topIndex] - this.tops[topIndex];
+        }
+        similarTo(otherCache) {
+            return similarNumArrays(this.tops || [], otherCache.tops || []) &&
+                similarNumArrays(this.bottoms || [], otherCache.bottoms || []) &&
+                similarNumArrays(this.lefts || [], otherCache.lefts || []) &&
+                similarNumArrays(this.rights || [], otherCache.rights || []);
+        }
+    }
+    function similarNumArrays(a, b) {
+        const len = a.length;
+        if (len !== b.length) {
+            return false;
+        }
+        for (let i = 0; i < len; i++) {
+            if (Math.round(a[i]) !== Math.round(b[i])) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    /* eslint max-classes-per-file: "off" */
+    /*
+    An object for getting/setting scroll-related information for an element.
+    Internally, this is done very differently for window versus DOM element,
+    so this object serves as a common interface.
+    */
+    class ScrollController {
+        getMaxScrollTop() {
+            return this.getScrollHeight() - this.getClientHeight();
+        }
+        getMaxScrollLeft() {
+            return this.getScrollWidth() - this.getClientWidth();
+        }
+        canScrollVertically() {
+            return this.getMaxScrollTop() > 0;
+        }
+        canScrollHorizontally() {
+            return this.getMaxScrollLeft() > 0;
+        }
+        canScrollUp() {
+            return this.getScrollTop() > 0;
+        }
+        canScrollDown() {
+            return this.getScrollTop() < this.getMaxScrollTop();
+        }
+        canScrollLeft() {
+            return this.getScrollLeft() > 0;
+        }
+        canScrollRight() {
+            return this.getScrollLeft() < this.getMaxScrollLeft();
+        }
+    }
+    class ElementScrollController extends ScrollController {
+        constructor(el) {
+            super();
+            this.el = el;
+        }
+        getScrollTop() {
+            return this.el.scrollTop;
+        }
+        getScrollLeft() {
+            return this.el.scrollLeft;
+        }
+        setScrollTop(top) {
+            this.el.scrollTop = top;
+        }
+        setScrollLeft(left) {
+            this.el.scrollLeft = left;
+        }
+        getScrollWidth() {
+            return this.el.scrollWidth;
+        }
+        getScrollHeight() {
+            return this.el.scrollHeight;
+        }
+        getClientHeight() {
+            return this.el.clientHeight;
+        }
+        getClientWidth() {
+            return this.el.clientWidth;
+        }
+    }
+    class WindowScrollController extends ScrollController {
+        getScrollTop() {
+            return window.scrollY;
+        }
+        getScrollLeft() {
+            return window.scrollX;
+        }
+        setScrollTop(n) {
+            window.scroll(window.scrollX, n);
+        }
+        setScrollLeft(n) {
+            window.scroll(n, window.scrollY);
+        }
+        getScrollWidth() {
+            return document.documentElement.scrollWidth;
+        }
+        getScrollHeight() {
+            return document.documentElement.scrollHeight;
+        }
+        getClientHeight() {
+            return document.documentElement.clientHeight;
+        }
+        getClientWidth() {
+            return document.documentElement.clientWidth;
+        }
+    }
+
+    class Theme {
+        constructor(calendarOptions) {
+            if (this.iconOverrideOption) {
+                this.setIconOverride(calendarOptions[this.iconOverrideOption]);
+            }
+        }
+        setIconOverride(iconOverrideHash) {
+            let iconClassesCopy;
+            let buttonName;
+            if (typeof iconOverrideHash === 'object' && iconOverrideHash) { // non-null object
+                iconClassesCopy = Object.assign({}, this.iconClasses);
+                for (buttonName in iconOverrideHash) {
+                    iconClassesCopy[buttonName] = this.applyIconOverridePrefix(iconOverrideHash[buttonName]);
+                }
+                this.iconClasses = iconClassesCopy;
+            }
+            else if (iconOverrideHash === false) {
+                this.iconClasses = {};
+            }
+        }
+        applyIconOverridePrefix(className) {
+            let prefix = this.iconOverridePrefix;
+            if (prefix && className.indexOf(prefix) !== 0) { // if not already present
+                className = prefix + className;
+            }
+            return className;
+        }
+        getClass(key) {
+            return this.classes[key] || '';
+        }
+        getIconClass(buttonName, isRtl) {
+            let className;
+            if (isRtl && this.rtlIconClasses) {
+                className = this.rtlIconClasses[buttonName] || this.iconClasses[buttonName];
+            }
+            else {
+                className = this.iconClasses[buttonName];
+            }
+            if (className) {
+                return `${this.baseIconClass} ${className}`;
+            }
+            return '';
+        }
+        getCustomButtonIconClass(customButtonProps) {
+            let className;
+            if (this.iconOverrideCustomButtonOption) {
+                className = customButtonProps[this.iconOverrideCustomButtonOption];
+                if (className) {
+                    return `${this.baseIconClass} ${this.applyIconOverridePrefix(className)}`;
+                }
+            }
+            return '';
+        }
+    }
+    Theme.prototype.classes = {};
+    Theme.prototype.iconClasses = {};
+    Theme.prototype.baseIconClass = '';
+    Theme.prototype.iconOverridePrefix = '';
+
+    var n,l$1,u$1,i$1,t,r$1,o,f$1,e$1,c$1={},s=[],a$1=/acit|ex(?:s|g|n|p|$)|rph|grid|ows|mnc|ntw|ine[ch]|zoo|^ord|itera/i;function h(n,l){for(var u in l)n[u]=l[u];return n}function v$1(n){var l=n.parentNode;l&&l.removeChild(n);}function y(l,u,i){var t,r,o,f={};for(o in u)"key"==o?t=u[o]:"ref"==o?r=u[o]:f[o]=u[o];if(arguments.length>2&&(f.children=arguments.length>3?n.call(arguments,2):i),"function"==typeof l&&null!=l.defaultProps)for(o in l.defaultProps)void 0===f[o]&&(f[o]=l.defaultProps[o]);return p(l,f,t,r,null)}function p(n,i,t,r,o){var f={type:n,props:i,key:t,ref:r,__k:null,__:null,__b:0,__e:null,__d:void 0,__c:null,__h:null,constructor:void 0,__v:null==o?++u$1:o};return null==o&&null!=l$1.vnode&&l$1.vnode(f),f}function d(){return {current:null}}function _(n){return n.children}function k$1(n,l,u,i,t){var r;for(r in u)"children"===r||"key"===r||r in l||g$2(n,r,null,u[r],i);for(r in l)t&&"function"!=typeof l[r]||"children"===r||"key"===r||"value"===r||"checked"===r||u[r]===l[r]||g$2(n,r,l[r],u[r],i);}function b$1(n,l,u){"-"===l[0]?n.setProperty(l,null==u?"":u):n[l]=null==u?"":"number"!=typeof u||a$1.test(l)?u:u+"px";}function g$2(n,l,u,i,t){var r;n:if("style"===l)if("string"==typeof u)n.style.cssText=u;else {if("string"==typeof i&&(n.style.cssText=i=""),i)for(l in i)u&&l in u||b$1(n.style,l,"");if(u)for(l in u)i&&u[l]===i[l]||b$1(n.style,l,u[l]);}else if("o"===l[0]&&"n"===l[1])r=l!==(l=l.replace(/Capture$/,"")),l=l.toLowerCase()in n?l.toLowerCase().slice(2):l.slice(2),n.l||(n.l={}),n.l[l+r]=u,u?i||n.addEventListener(l,r?w$2:m$1,r):n.removeEventListener(l,r?w$2:m$1,r);else if("dangerouslySetInnerHTML"!==l){if(t)l=l.replace(/xlink(H|:h)/,"h").replace(/sName$/,"s");else if("width"!==l&&"height"!==l&&"href"!==l&&"list"!==l&&"form"!==l&&"tabIndex"!==l&&"download"!==l&&l in n)try{n[l]=null==u?"":u;break n}catch(n){}"function"==typeof u||(null==u||!1===u&&-1==l.indexOf("-")?n.removeAttribute(l):n.setAttribute(l,u));}}function m$1(n){t=!0;try{return this.l[n.type+!1](l$1.event?l$1.event(n):n)}finally{t=!1;}}function w$2(n){t=!0;try{return this.l[n.type+!0](l$1.event?l$1.event(n):n)}finally{t=!1;}}function x$1(n,l){this.props=n,this.context=l;}function A(n,l){if(null==l)return n.__?A(n.__,n.__.__k.indexOf(n)+1):null;for(var u;l<n.__k.length;l++)if(null!=(u=n.__k[l])&&null!=u.__e)return u.__e;return "function"==typeof n.type?A(n):null}function P$1(n){var l,u;if(null!=(n=n.__)&&null!=n.__c){for(n.__e=n.__c.base=null,l=0;l<n.__k.length;l++)if(null!=(u=n.__k[l])&&null!=u.__e){n.__e=n.__c.base=u.__e;break}return P$1(n)}}function C$1(n){t?setTimeout(n):f$1(n);}function T$1(n){(!n.__d&&(n.__d=!0)&&r$1.push(n)&&!$$1.__r++||o!==l$1.debounceRendering)&&((o=l$1.debounceRendering)||C$1)($$1);}function $$1(){var n,l,u,i,t,o,f,e;for(r$1.sort(function(n,l){return n.__v.__b-l.__v.__b});n=r$1.shift();)n.__d&&(l=r$1.length,i=void 0,t=void 0,f=(o=(u=n).__v).__e,(e=u.__P)&&(i=[],(t=h({},o)).__v=o.__v+1,M(e,o,t,u.__n,void 0!==e.ownerSVGElement,null!=o.__h?[f]:null,i,null==f?A(o):f,o.__h),N(i,o),o.__e!=f&&P$1(o)),r$1.length>l&&r$1.sort(function(n,l){return n.__v.__b-l.__v.__b}));$$1.__r=0;}function H$1(n,l,u,i,t,r,o,f,e,a){var h,v,y,d,k,b,g,m=i&&i.__k||s,w=m.length;for(u.__k=[],h=0;h<l.length;h++)if(null!=(d=u.__k[h]=null==(d=l[h])||"boolean"==typeof d?null:"string"==typeof d||"number"==typeof d||"bigint"==typeof d?p(null,d,null,null,d):Array.isArray(d)?p(_,{children:d},null,null,null):d.__b>0?p(d.type,d.props,d.key,d.ref?d.ref:null,d.__v):d)){if(d.__=u,d.__b=u.__b+1,null===(y=m[h])||y&&d.key==y.key&&d.type===y.type)m[h]=void 0;else for(v=0;v<w;v++){if((y=m[v])&&d.key==y.key&&d.type===y.type){m[v]=void 0;break}y=null;}M(n,d,y=y||c$1,t,r,o,f,e,a),k=d.__e,(v=d.ref)&&y.ref!=v&&(g||(g=[]),y.ref&&g.push(y.ref,null,d),g.push(v,d.__c||k,d)),null!=k?(null==b&&(b=k),"function"==typeof d.type&&d.__k===y.__k?d.__d=e=I$1(d,e,n):e=z$1(n,d,y,m,k,e),"function"==typeof u.type&&(u.__d=e)):e&&y.__e==e&&e.parentNode!=n&&(e=A(y));}for(u.__e=b,h=w;h--;)null!=m[h]&&("function"==typeof u.type&&null!=m[h].__e&&m[h].__e==u.__d&&(u.__d=L$1(i).nextSibling),q(m[h],m[h]));if(g)for(h=0;h<g.length;h++)S(g[h],g[++h],g[++h]);}function I$1(n,l,u){for(var i,t=n.__k,r=0;t&&r<t.length;r++)(i=t[r])&&(i.__=n,l="function"==typeof i.type?I$1(i,l,u):z$1(u,i,i,t,i.__e,l));return l}function j$2(n,l){return l=l||[],null==n||"boolean"==typeof n||(Array.isArray(n)?n.some(function(n){j$2(n,l);}):l.push(n)),l}function z$1(n,l,u,i,t,r){var o,f,e;if(void 0!==l.__d)o=l.__d,l.__d=void 0;else if(null==u||t!=r||null==t.parentNode)n:if(null==r||r.parentNode!==n)n.appendChild(t),o=null;else {for(f=r,e=0;(f=f.nextSibling)&&e<i.length;e+=1)if(f==t)break n;n.insertBefore(t,r),o=r;}return void 0!==o?o:t.nextSibling}function L$1(n){var l,u,i;if(null==n.type||"string"==typeof n.type)return n.__e;if(n.__k)for(l=n.__k.length-1;l>=0;l--)if((u=n.__k[l])&&(i=L$1(u)))return i;return null}function M(n,u,i,t,r,o,f,e,c){var s,a,v,y,p,d,k,b,g,m,w,A,P,C,T,$=u.type;if(void 0!==u.constructor)return null;null!=i.__h&&(c=i.__h,e=u.__e=i.__e,u.__h=null,o=[e]),(s=l$1.__b)&&s(u);try{n:if("function"==typeof $){if(b=u.props,g=(s=$.contextType)&&t[s.__c],m=s?g?g.props.value:s.__:t,i.__c?k=(a=u.__c=i.__c).__=a.__E:("prototype"in $&&$.prototype.render?u.__c=a=new $(b,m):(u.__c=a=new x$1(b,m),a.constructor=$,a.render=B$1),g&&g.sub(a),a.props=b,a.state||(a.state={}),a.context=m,a.__n=t,v=a.__d=!0,a.__h=[],a._sb=[]),null==a.__s&&(a.__s=a.state),null!=$.getDerivedStateFromProps&&(a.__s==a.state&&(a.__s=h({},a.__s)),h(a.__s,$.getDerivedStateFromProps(b,a.__s))),y=a.props,p=a.state,a.__v=u,v)null==$.getDerivedStateFromProps&&null!=a.componentWillMount&&a.componentWillMount(),null!=a.componentDidMount&&a.__h.push(a.componentDidMount);else {if(null==$.getDerivedStateFromProps&&b!==y&&null!=a.componentWillReceiveProps&&a.componentWillReceiveProps(b,m),!a.__e&&null!=a.shouldComponentUpdate&&!1===a.shouldComponentUpdate(b,a.__s,m)||u.__v===i.__v){for(u.__v!==i.__v&&(a.props=b,a.state=a.__s,a.__d=!1),u.__e=i.__e,u.__k=i.__k,u.__k.forEach(function(n){n&&(n.__=u);}),w=0;w<a._sb.length;w++)a.__h.push(a._sb[w]);a._sb=[],a.__h.length&&f.push(a);break n}null!=a.componentWillUpdate&&a.componentWillUpdate(b,a.__s,m),null!=a.componentDidUpdate&&a.__h.push(function(){a.componentDidUpdate(y,p,d);});}if(a.context=m,a.props=b,a.__P=n,A=l$1.__r,P=0,"prototype"in $&&$.prototype.render){for(a.state=a.__s,a.__d=!1,A&&A(u),s=a.render(a.props,a.state,a.context),C=0;C<a._sb.length;C++)a.__h.push(a._sb[C]);a._sb=[];}else do{a.__d=!1,A&&A(u),s=a.render(a.props,a.state,a.context),a.state=a.__s;}while(a.__d&&++P<25);a.state=a.__s,null!=a.getChildContext&&(t=h(h({},t),a.getChildContext())),v||null==a.getSnapshotBeforeUpdate||(d=a.getSnapshotBeforeUpdate(y,p)),T=null!=s&&s.type===_&&null==s.key?s.props.children:s,H$1(n,Array.isArray(T)?T:[T],u,i,t,r,o,f,e,c),a.base=u.__e,u.__h=null,a.__h.length&&f.push(a),k&&(a.__E=a.__=null),a.__e=!1;}else null==o&&u.__v===i.__v?(u.__k=i.__k,u.__e=i.__e):u.__e=O(i.__e,u,i,t,r,o,f,c);(s=l$1.diffed)&&s(u);}catch(n){u.__v=null,(c||null!=o)&&(u.__e=e,u.__h=!!c,o[o.indexOf(e)]=null),l$1.__e(n,u,i);}}function N(n,u){l$1.__c&&l$1.__c(u,n),n.some(function(u){try{n=u.__h,u.__h=[],n.some(function(n){n.call(u);});}catch(n){l$1.__e(n,u.__v);}});}function O(l,u,i,t,r,o,f,e){var s,a,h,y=i.props,p=u.props,d=u.type,_=0;if("svg"===d&&(r=!0),null!=o)for(;_<o.length;_++)if((s=o[_])&&"setAttribute"in s==!!d&&(d?s.localName===d:3===s.nodeType)){l=s,o[_]=null;break}if(null==l){if(null===d)return document.createTextNode(p);l=r?document.createElementNS("http://www.w3.org/2000/svg",d):document.createElement(d,p.is&&p),o=null,e=!1;}if(null===d)y===p||e&&l.data===p||(l.data=p);else {if(o=o&&n.call(l.childNodes),a=(y=i.props||c$1).dangerouslySetInnerHTML,h=p.dangerouslySetInnerHTML,!e){if(null!=o)for(y={},_=0;_<l.attributes.length;_++)y[l.attributes[_].name]=l.attributes[_].value;(h||a)&&(h&&(a&&h.__html==a.__html||h.__html===l.innerHTML)||(l.innerHTML=h&&h.__html||""));}if(k$1(l,p,y,r,e),h)u.__k=[];else if(_=u.props.children,H$1(l,Array.isArray(_)?_:[_],u,i,t,r&&"foreignObject"!==d,o,f,o?o[0]:i.__k&&A(i,0),e),null!=o)for(_=o.length;_--;)null!=o[_]&&v$1(o[_]);e||("value"in p&&void 0!==(_=p.value)&&(_!==l.value||"progress"===d&&!_||"option"===d&&_!==y.value)&&g$2(l,"value",_,y.value,!1),"checked"in p&&void 0!==(_=p.checked)&&_!==l.checked&&g$2(l,"checked",_,y.checked,!1));}return l}function S(n,u,i){try{"function"==typeof n?n(u):n.current=u;}catch(n){l$1.__e(n,i);}}function q(n,u,i){var t,r;if(l$1.unmount&&l$1.unmount(n),(t=n.ref)&&(t.current&&t.current!==n.__e||S(t,null,u)),null!=(t=n.__c)){if(t.componentWillUnmount)try{t.componentWillUnmount();}catch(n){l$1.__e(n,u);}t.base=t.__P=null,n.__c=void 0;}if(t=n.__k)for(r=0;r<t.length;r++)t[r]&&q(t[r],u,i||"function"!=typeof n.type);i||null==n.__e||v$1(n.__e),n.__=n.__e=n.__d=void 0;}function B$1(n,l,u){return this.constructor(n,u)}function D$1(u,i,t){var r,o,f;l$1.__&&l$1.__(u,i),o=(r="function"==typeof t)?null:t&&t.__k||i.__k,f=[],M(i,u=(!r&&t||i).__k=y(_,null,[u]),o||c$1,c$1,void 0!==i.ownerSVGElement,!r&&t?[t]:o?null:i.firstChild?n.call(i.childNodes):null,f,!r&&t?t:o?o.__e:i.firstChild,r),N(f,u);}function E(n,l){D$1(n,l,E);}function F$1(l,u,i){var t,r,o,f=h({},l.props);for(o in u)"key"==o?t=u[o]:"ref"==o?r=u[o]:f[o]=u[o];return arguments.length>2&&(f.children=arguments.length>3?n.call(arguments,2):i),p(l.type,f,t||l.key,r||l.ref,null)}function G$1(n,l){var u={__c:l="__cC"+e$1++,__:n,Consumer:function(n,l){return n.children(l)},Provider:function(n){var u,i;return this.getChildContext||(u=[],(i={})[l]=this,this.getChildContext=function(){return i},this.shouldComponentUpdate=function(n){this.props.value!==n.value&&u.some(function(n){n.__e=!0,T$1(n);});},this.sub=function(n){u.push(n);var l=n.componentWillUnmount;n.componentWillUnmount=function(){u.splice(u.indexOf(n),1),l&&l.call(n);};}),n.children}};return u.Provider.__=u.Consumer.contextType=u}n=s.slice,l$1={__e:function(n,l,u,i){for(var t,r,o;l=l.__;)if((t=l.__c)&&!t.__)try{if((r=t.constructor)&&null!=r.getDerivedStateFromError&&(t.setState(r.getDerivedStateFromError(n)),o=t.__d),null!=t.componentDidCatch&&(t.componentDidCatch(n,i||{}),o=t.__d),o)return t.__E=t}catch(l){n=l;}throw n}},u$1=0,i$1=function(n){return null!=n&&void 0===n.constructor},t=!1,x$1.prototype.setState=function(n,l){var u;u=null!=this.__s&&this.__s!==this.state?this.__s:this.__s=h({},this.state),"function"==typeof n&&(n=n(h({},u),this.props)),n&&h(u,n),null!=n&&this.__v&&(l&&this._sb.push(l),T$1(this));},x$1.prototype.forceUpdate=function(n){this.__v&&(this.__e=!0,n&&this.__h.push(n),T$1(this));},x$1.prototype.render=_,r$1=[],f$1="function"==typeof Promise?Promise.prototype.then.bind(Promise.resolve()):setTimeout,$$1.__r=0,e$1=0;
+
+    var r,u,i,f=[],c=[],e=l$1.__b,a=l$1.__r,v=l$1.diffed,l=l$1.__c,m=l$1.unmount;function b(){for(var t;t=f.shift();)if(t.__P&&t.__H)try{t.__H.__h.forEach(k),t.__H.__h.forEach(w$1),t.__H.__h=[];}catch(r){t.__H.__h=[],l$1.__e(r,t.__v);}}l$1.__b=function(n){r=null,e&&e(n);},l$1.__r=function(n){a&&a(n);var i=(r=n.__c).__H;i&&(u===r?(i.__h=[],r.__h=[],i.__.forEach(function(n){n.__N&&(n.__=n.__N),n.__V=c,n.__N=n.i=void 0;})):(i.__h.forEach(k),i.__h.forEach(w$1),i.__h=[])),u=r;},l$1.diffed=function(t){v&&v(t);var o=t.__c;o&&o.__H&&(o.__H.__h.length&&(1!==f.push(o)&&i===l$1.requestAnimationFrame||((i=l$1.requestAnimationFrame)||j$1)(b)),o.__H.__.forEach(function(n){n.i&&(n.__H=n.i),n.__V!==c&&(n.__=n.__V),n.i=void 0,n.__V=c;})),u=r=null;},l$1.__c=function(t,r){r.some(function(t){try{t.__h.forEach(k),t.__h=t.__h.filter(function(n){return !n.__||w$1(n)});}catch(u){r.some(function(n){n.__h&&(n.__h=[]);}),r=[],l$1.__e(u,t.__v);}}),l&&l(t,r);},l$1.unmount=function(t){m&&m(t);var r,u=t.__c;u&&u.__H&&(u.__H.__.forEach(function(n){try{k(n);}catch(n){r=n;}}),u.__H=void 0,r&&l$1.__e(r,u.__v));};var g$1="function"==typeof requestAnimationFrame;function j$1(n){var t,r=function(){clearTimeout(u),g$1&&cancelAnimationFrame(t),setTimeout(n);},u=setTimeout(r,100);g$1&&(t=requestAnimationFrame(r));}function k(n){var t=r,u=n.__c;"function"==typeof u&&(n.__c=void 0,u()),r=t;}function w$1(n){var t=r;n.__c=n.__(),r=t;}
+
+    function g(n,t){for(var e in t)n[e]=t[e];return n}function C(n,t){for(var e in n)if("__source"!==e&&!(e in t))return !0;for(var r in t)if("__source"!==r&&n[r]!==t[r])return !0;return !1}function w(n){this.props=n;}(w.prototype=new x$1).isPureReactComponent=!0,w.prototype.shouldComponentUpdate=function(n,t){return C(this.props,n)||C(this.state,t)};var x=l$1.__b;l$1.__b=function(n){n.type&&n.type.__f&&n.ref&&(n.props.ref=n.ref,n.ref=null),x&&x(n);};var T=l$1.__e;l$1.__e=function(n,t,e,r){if(n.then)for(var u,o=t;o=o.__;)if((u=o.__c)&&u.__c)return null==t.__e&&(t.__e=e.__e,t.__k=e.__k),u.__c(n,t);T(n,t,e,r);};var I=l$1.unmount;function L(n,t,e){return n&&(n.__c&&n.__c.__H&&(n.__c.__H.__.forEach(function(n){"function"==typeof n.__c&&n.__c();}),n.__c.__H=null),null!=(n=g({},n)).__c&&(n.__c.__P===e&&(n.__c.__P=t),n.__c=null),n.__k=n.__k&&n.__k.map(function(n){return L(n,t,e)})),n}function U(n,t,e){return n&&(n.__v=null,n.__k=n.__k&&n.__k.map(function(n){return U(n,t,e)}),n.__c&&n.__c.__P===t&&(n.__e&&e.insertBefore(n.__e,n.__d),n.__c.__e=!0,n.__c.__P=e)),n}function D(){this.__u=0,this.t=null,this.__b=null;}function F(n){var t=n.__.__c;return t&&t.__a&&t.__a(n)}function V(){this.u=null,this.o=null;}l$1.unmount=function(n){var t=n.__c;t&&t.__R&&t.__R(),t&&!0===n.__h&&(n.type=null),I&&I(n);},(D.prototype=new x$1).__c=function(n,t){var e=t.__c,r=this;null==r.t&&(r.t=[]),r.t.push(e);var u=F(r.__v),o=!1,i=function(){o||(o=!0,e.__R=null,u?u(l):l());};e.__R=i;var l=function(){if(!--r.__u){if(r.state.__a){var n=r.state.__a;r.__v.__k[0]=U(n,n.__c.__P,n.__c.__O);}var t;for(r.setState({__a:r.__b=null});t=r.t.pop();)t.forceUpdate();}},c=!0===t.__h;r.__u++||c||r.setState({__a:r.__b=r.__v.__k[0]}),n.then(i,i);},D.prototype.componentWillUnmount=function(){this.t=[];},D.prototype.render=function(n,e){if(this.__b){if(this.__v.__k){var r=document.createElement("div"),o=this.__v.__k[0].__c;this.__v.__k[0]=L(this.__b,r,o.__O=o.__P);}this.__b=null;}var i=e.__a&&y(_,null,n.fallback);return i&&(i.__h=null),[y(_,null,e.__a?null:n.children),i]};var W=function(n,t,e){if(++e[1]===e[0]&&n.o.delete(t),n.props.revealOrder&&("t"!==n.props.revealOrder[0]||!n.o.size))for(e=n.u;e;){for(;e.length>3;)e.pop()();if(e[1]<e[0])break;n.u=e=e[2];}};function P(n){return this.getChildContext=function(){return n.context},n.children}function $(n){var e=this,r=n.i;e.componentWillUnmount=function(){D$1(null,e.l),e.l=null,e.i=null;},e.i&&e.i!==r&&e.componentWillUnmount(),n.__v?(e.l||(e.i=r,e.l={nodeType:1,parentNode:r,childNodes:[],appendChild:function(n){this.childNodes.push(n),e.i.appendChild(n);},insertBefore:function(n,t){this.childNodes.push(n),e.i.appendChild(n);},removeChild:function(n){this.childNodes.splice(this.childNodes.indexOf(n)>>>1,1),e.i.removeChild(n);}}),D$1(y(P,{context:e.context},n.__v),e.l)):e.l&&e.componentWillUnmount();}function j(n,e){var r=y($,{__v:n,i:e});return r.containerInfo=e,r}(V.prototype=new x$1).__a=function(n){var t=this,e=F(t.__v),r=t.o.get(n);return r[0]++,function(u){var o=function(){t.props.revealOrder?(r.push(u),W(t,n,r)):u();};e?e(o):o();}},V.prototype.render=function(n){this.u=null,this.o=new Map;var t=j$2(n.children);n.revealOrder&&"b"===n.revealOrder[0]&&t.reverse();for(var e=t.length;e--;)this.o.set(t[e],this.u=[1,0,this.u]);return n.children},V.prototype.componentDidUpdate=V.prototype.componentDidMount=function(){var n=this;this.o.forEach(function(t,e){W(n,e,t);});};var z="undefined"!=typeof Symbol&&Symbol.for&&Symbol.for("react.element")||60103,B=/^(?:accent|alignment|arabic|baseline|cap|clip(?!PathU)|color|dominant|fill|flood|font|glyph(?!R)|horiz|image|letter|lighting|marker(?!H|W|U)|overline|paint|pointer|shape|stop|strikethrough|stroke|text(?!L)|transform|underline|unicode|units|v|vector|vert|word|writing|x(?!C))[A-Z]/,H="undefined"!=typeof document,Z=function(n){return ("undefined"!=typeof Symbol&&"symbol"==typeof Symbol()?/fil|che|rad/i:/fil|che|ra/i).test(n)};x$1.prototype.isReactComponent={},["componentWillMount","componentWillReceiveProps","componentWillUpdate"].forEach(function(t){Object.defineProperty(x$1.prototype,t,{configurable:!0,get:function(){return this["UNSAFE_"+t]},set:function(n){Object.defineProperty(this,t,{configurable:!0,writable:!0,value:n});}});});var G=l$1.event;function J(){}function K(){return this.cancelBubble}function Q(){return this.defaultPrevented}l$1.event=function(n){return G&&(n=G(n)),n.persist=J,n.isPropagationStopped=K,n.isDefaultPrevented=Q,n.nativeEvent=n};var nn={configurable:!0,get:function(){return this.class}},tn=l$1.vnode;l$1.vnode=function(n){var t=n.type,e=n.props,u=e;if("string"==typeof t){var o=-1===t.indexOf("-");for(var i in u={},e){var l=e[i];H&&"children"===i&&"noscript"===t||"value"===i&&"defaultValue"in e&&null==l||("defaultValue"===i&&"value"in e&&null==e.value?i="value":"download"===i&&!0===l?l="":/ondoubleclick/i.test(i)?i="ondblclick":/^onchange(textarea|input)/i.test(i+t)&&!Z(e.type)?i="oninput":/^onfocus$/i.test(i)?i="onfocusin":/^onblur$/i.test(i)?i="onfocusout":/^on(Ani|Tra|Tou|BeforeInp|Compo)/.test(i)?i=i.toLowerCase():o&&B.test(i)?i=i.replace(/[A-Z0-9]/g,"-$&").toLowerCase():null===l&&(l=void 0),/^oninput$/i.test(i)&&(i=i.toLowerCase(),u[i]&&(i="oninputCapture")),u[i]=l);}"select"==t&&u.multiple&&Array.isArray(u.value)&&(u.value=j$2(e.children).forEach(function(n){n.props.selected=-1!=u.value.indexOf(n.props.value);})),"select"==t&&null!=u.defaultValue&&(u.value=j$2(e.children).forEach(function(n){n.props.selected=u.multiple?-1!=u.defaultValue.indexOf(n.props.value):u.defaultValue==n.props.value;})),n.props=u,e.class!=e.className&&(nn.enumerable="className"in e,null!=e.className&&(u.class=e.className),Object.defineProperty(u,"className",nn));}n.$$typeof=z,tn&&tn(n);};var en=l$1.__r;l$1.__r=function(n){en&&en(n),n.__c;};
+
+    /*
+    NOTE: this can be a public API, especially createElement for hooks.
+    See examples/typescript-scheduler/src/index.ts
+    */
+    function flushSync(runBeforeFlush) {
+        runBeforeFlush();
+        let oldDebounceRendering = l$1.debounceRendering; // orig
+        let callbackQ = [];
+        function execCallbackSync(callback) {
+            callbackQ.push(callback);
+        }
+        l$1.debounceRendering = execCallbackSync;
+        D$1(y(FakeComponent, {}), document.createElement('div'));
+        while (callbackQ.length) {
+            callbackQ.shift()();
+        }
+        l$1.debounceRendering = oldDebounceRendering;
+    }
+    class FakeComponent extends x$1 {
+        render() { return y('div', {}); }
+        componentDidMount() { this.setState({}); }
+    }
+    // TODO: use preact/compat instead?
+    function createContext(defaultValue) {
+        let ContextType = G$1(defaultValue);
+        let origProvider = ContextType.Provider;
+        ContextType.Provider = function () {
+            let isNew = !this.getChildContext;
+            let children = origProvider.apply(this, arguments); // eslint-disable-line prefer-rest-params
+            if (isNew) {
+                let subs = [];
+                this.shouldComponentUpdate = (_props) => {
+                    if (this.props.value !== _props.value) {
+                        subs.forEach((c) => {
+                            c.context = _props.value;
+                            c.forceUpdate();
+                        });
+                    }
+                };
+                this.sub = (c) => {
+                    subs.push(c);
+                    let old = c.componentWillUnmount;
+                    c.componentWillUnmount = () => {
+                        subs.splice(subs.indexOf(c), 1);
+                        old && old.call(c);
+                    };
+                };
+            }
+            return children;
+        };
+        return ContextType;
+    }
+
+    var preact = {
+        __proto__: null,
+        flushSync: flushSync,
+        createContext: createContext,
+        createPortal: j,
+        Component: x$1,
+        Fragment: _,
+        cloneElement: F$1,
+        createElement: y,
+        createRef: d,
+        h: y,
+        hydrate: E,
+        get isValidElement () { return i$1; },
+        get options () { return l$1; },
+        render: D$1,
+        toChildArray: j$2
+    };
+
+    class ScrollResponder {
+        constructor(execFunc, emitter, scrollTime, scrollTimeReset) {
+            this.execFunc = execFunc;
+            this.emitter = emitter;
+            this.scrollTime = scrollTime;
+            this.scrollTimeReset = scrollTimeReset;
+            this.handleScrollRequest = (request) => {
+                this.queuedRequest = Object.assign({}, this.queuedRequest || {}, request);
+                this.drain();
+            };
+            emitter.on('_scrollRequest', this.handleScrollRequest);
+            this.fireInitialScroll();
+        }
+        detach() {
+            this.emitter.off('_scrollRequest', this.handleScrollRequest);
+        }
+        update(isDatesNew) {
+            if (isDatesNew && this.scrollTimeReset) {
+                this.fireInitialScroll(); // will drain
+            }
+            else {
+                this.drain();
+            }
+        }
+        fireInitialScroll() {
+            this.handleScrollRequest({
+                time: this.scrollTime,
+            });
+        }
+        drain() {
+            if (this.queuedRequest && this.execFunc(this.queuedRequest)) {
+                this.queuedRequest = null;
+            }
+        }
+    }
+
+    const ViewContextType = createContext({}); // for Components
+    function buildViewContext(viewSpec, viewApi, viewOptions, dateProfileGenerator, dateEnv, nowManager, theme, pluginHooks, dispatch, getCurrentData, emitter, calendarApi, registerInteractiveComponent, unregisterInteractiveComponent) {
+        return {
+            dateEnv,
+            nowManager,
+            options: viewOptions,
+            pluginHooks,
+            emitter,
+            dispatch,
+            getCurrentData,
+            calendarApi,
+            viewSpec,
+            viewApi,
+            dateProfileGenerator,
+            theme,
+            isRtl: viewOptions.direction === 'rtl',
+            addResizeHandler(handler) {
+                emitter.on('_resize', handler);
+            },
+            removeResizeHandler(handler) {
+                emitter.off('_resize', handler);
+            },
+            createScrollResponder(execFunc) {
+                return new ScrollResponder(execFunc, emitter, createDuration(viewOptions.scrollTime), viewOptions.scrollTimeReset);
+            },
+            registerInteractiveComponent,
+            unregisterInteractiveComponent,
+        };
+    }
+
+    /* eslint max-classes-per-file: off */
+    class PureComponent extends x$1 {
+        shouldComponentUpdate(nextProps, nextState) {
+            if (this.debug) {
+                // eslint-disable-next-line no-console
+                console.log(getUnequalProps(nextProps, this.props), getUnequalProps(nextState, this.state));
+            }
+            return !compareObjs(this.props, nextProps, this.propEquality) ||
+                !compareObjs(this.state, nextState, this.stateEquality);
+        }
+        // HACK for freakin' React StrictMode
+        safeSetState(newState) {
+            if (!compareObjs(this.state, Object.assign(Object.assign({}, this.state), newState), this.stateEquality)) {
+                this.setState(newState);
+            }
+        }
+    }
+    PureComponent.addPropsEquality = addPropsEquality;
+    PureComponent.addStateEquality = addStateEquality;
+    PureComponent.contextType = ViewContextType;
+    PureComponent.prototype.propEquality = {};
+    PureComponent.prototype.stateEquality = {};
+    class BaseComponent extends PureComponent {
+    }
+    BaseComponent.contextType = ViewContextType;
+    function addPropsEquality(propEquality) {
+        let hash = Object.create(this.prototype.propEquality);
+        Object.assign(hash, propEquality);
+        this.prototype.propEquality = hash;
+    }
+    function addStateEquality(stateEquality) {
+        let hash = Object.create(this.prototype.stateEquality);
+        Object.assign(hash, stateEquality);
+        this.prototype.stateEquality = hash;
+    }
+    // use other one
+    function setRef(ref, current) {
+        if (typeof ref === 'function') {
+            ref(current);
+        }
+        else if (ref) {
+            // see https://github.com/facebook/react/issues/13029
+            ref.current = current;
+        }
+    }
+
+    /*
+    an INTERACTABLE date component
+
+    PURPOSES:
+    - hook up to fg, fill, and mirror renderers
+    - interface for dragging and hits
+    */
+    class DateComponent extends BaseComponent {
+        constructor() {
+            super(...arguments);
+            this.uid = guid();
+        }
+        // Hit System
+        // -----------------------------------------------------------------------------------------------------------------
+        prepareHits() {
+        }
+        queryHit(positionLeft, positionTop, elWidth, elHeight) {
+            return null; // this should be abstract
+        }
+        // Pointer Interaction Utils
+        // -----------------------------------------------------------------------------------------------------------------
+        isValidSegDownEl(el) {
+            return !this.props.eventDrag && // HACK
+                !this.props.eventResize && // HACK
+                !elementClosest(el, '.fc-event-mirror');
+        }
+        isValidDateDownEl(el) {
+            return !elementClosest(el, '.fc-event:not(.fc-bg-event)') &&
+                !elementClosest(el, '.fc-more-link') && // a "more.." link
+                !elementClosest(el, 'a[data-navlink]') && // a clickable nav link
+                !elementClosest(el, '.fc-popover'); // hack
+        }
+    }
+
+    class DateProfileGenerator {
+        constructor(props) {
+            this.props = props;
+            this.initHiddenDays();
+        }
+        /* Date Range Computation
+        ------------------------------------------------------------------------------------------------------------------*/
+        // Builds a structure with info about what the dates/ranges will be for the "prev" view.
+        buildPrev(currentDateProfile, currentDate, forceToValid) {
+            let { dateEnv } = this.props;
+            let prevDate = dateEnv.subtract(dateEnv.startOf(currentDate, currentDateProfile.currentRangeUnit), // important for start-of-month
+            currentDateProfile.dateIncrement);
+            return this.build(prevDate, -1, forceToValid);
+        }
+        // Builds a structure with info about what the dates/ranges will be for the "next" view.
+        buildNext(currentDateProfile, currentDate, forceToValid) {
+            let { dateEnv } = this.props;
+            let nextDate = dateEnv.add(dateEnv.startOf(currentDate, currentDateProfile.currentRangeUnit), // important for start-of-month
+            currentDateProfile.dateIncrement);
+            return this.build(nextDate, 1, forceToValid);
+        }
+        // Builds a structure holding dates/ranges for rendering around the given date.
+        // Optional direction param indicates whether the date is being incremented/decremented
+        // from its previous value. decremented = -1, incremented = 1 (default).
+        build(currentDate, direction, forceToValid = true) {
+            let { props } = this;
+            let validRange;
+            let currentInfo;
+            let isRangeAllDay;
+            let renderRange;
+            let activeRange;
+            let isValid;
+            validRange = this.buildValidRange();
+            validRange = this.trimHiddenDays(validRange);
+            if (forceToValid) {
+                currentDate = constrainMarkerToRange(currentDate, validRange);
+            }
+            currentInfo = this.buildCurrentRangeInfo(currentDate, direction);
+            isRangeAllDay = /^(year|month|week|day)$/.test(currentInfo.unit);
+            renderRange = this.buildRenderRange(this.trimHiddenDays(currentInfo.range), currentInfo.unit, isRangeAllDay);
+            renderRange = this.trimHiddenDays(renderRange);
+            activeRange = renderRange;
+            if (!props.showNonCurrentDates) {
+                activeRange = intersectRanges(activeRange, currentInfo.range);
+            }
+            activeRange = this.adjustActiveRange(activeRange);
+            activeRange = intersectRanges(activeRange, validRange); // might return null
+            // it's invalid if the originally requested date is not contained,
+            // or if the range is completely outside of the valid range.
+            isValid = rangesIntersect(currentInfo.range, validRange);
+            // HACK: constrain to render-range so `currentDate` is more useful to view rendering
+            if (!rangeContainsMarker(renderRange, currentDate)) {
+                currentDate = renderRange.start;
+            }
+            return {
+                currentDate,
+                // constraint for where prev/next operations can go and where events can be dragged/resized to.
+                // an object with optional start and end properties.
+                validRange,
+                // range the view is formally responsible for.
+                // for example, a month view might have 1st-31st, excluding padded dates
+                currentRange: currentInfo.range,
+                // name of largest unit being displayed, like "month" or "week"
+                currentRangeUnit: currentInfo.unit,
+                isRangeAllDay,
+                // dates that display events and accept drag-n-drop
+                // will be `null` if no dates accept events
+                activeRange,
+                // date range with a rendered skeleton
+                // includes not-active days that need some sort of DOM
+                renderRange,
+                // Duration object that denotes the first visible time of any given day
+                slotMinTime: props.slotMinTime,
+                // Duration object that denotes the exclusive visible end time of any given day
+                slotMaxTime: props.slotMaxTime,
+                isValid,
+                // how far the current date will move for a prev/next operation
+                dateIncrement: this.buildDateIncrement(currentInfo.duration),
+                // pass a fallback (might be null) ^
+            };
+        }
+        // Builds an object with optional start/end properties.
+        // Indicates the minimum/maximum dates to display.
+        // not responsible for trimming hidden days.
+        buildValidRange() {
+            let input = this.props.validRangeInput;
+            let simpleInput = typeof input === 'function'
+                ? input.call(this.props.calendarApi, this.props.dateEnv.toDate(this.props.nowManager.getDateMarker()))
+                : input;
+            return this.refineRange(simpleInput) ||
+                { start: null, end: null }; // completely open-ended
+        }
+        // Builds a structure with info about the "current" range, the range that is
+        // highlighted as being the current month for example.
+        // See build() for a description of `direction`.
+        // Guaranteed to have `range` and `unit` properties. `duration` is optional.
+        buildCurrentRangeInfo(date, direction) {
+            let { props } = this;
+            let duration = null;
+            let unit = null;
+            let range = null;
+            let dayCount;
+            if (props.duration) {
+                duration = props.duration;
+                unit = props.durationUnit;
+                range = this.buildRangeFromDuration(date, direction, duration, unit);
+            }
+            else if ((dayCount = this.props.dayCount)) {
+                unit = 'day';
+                range = this.buildRangeFromDayCount(date, direction, dayCount);
+            }
+            else if ((range = this.buildCustomVisibleRange(date))) {
+                unit = props.dateEnv.greatestWholeUnit(range.start, range.end).unit;
+            }
+            else {
+                duration = this.getFallbackDuration();
+                unit = greatestDurationDenominator(duration).unit;
+                range = this.buildRangeFromDuration(date, direction, duration, unit);
+            }
+            return { duration, unit, range };
+        }
+        getFallbackDuration() {
+            return createDuration({ day: 1 });
+        }
+        // Returns a new activeRange to have time values (un-ambiguate)
+        // slotMinTime or slotMaxTime causes the range to expand.
+        adjustActiveRange(range) {
+            let { dateEnv, usesMinMaxTime, slotMinTime, slotMaxTime } = this.props;
+            let { start, end } = range;
+            if (usesMinMaxTime) {
+                // expand active range if slotMinTime is negative (why not when positive?)
+                if (asRoughDays(slotMinTime) < 0) {
+                    start = startOfDay(start); // necessary?
+                    start = dateEnv.add(start, slotMinTime);
+                }
+                // expand active range if slotMaxTime is beyond one day (why not when negative?)
+                if (asRoughDays(slotMaxTime) > 1) {
+                    end = startOfDay(end); // necessary?
+                    end = addDays(end, -1);
+                    end = dateEnv.add(end, slotMaxTime);
+                }
+            }
+            return { start, end };
+        }
+        // Builds the "current" range when it is specified as an explicit duration.
+        // `unit` is the already-computed greatestDurationDenominator unit of duration.
+        buildRangeFromDuration(date, direction, duration, unit) {
+            let { dateEnv, dateAlignment } = this.props;
+            let start;
+            let end;
+            let res;
+            // compute what the alignment should be
+            if (!dateAlignment) {
+                let { dateIncrement } = this.props;
+                if (dateIncrement) {
+                    // use the smaller of the two units
+                    if (asRoughMs(dateIncrement) < asRoughMs(duration)) {
+                        dateAlignment = greatestDurationDenominator(dateIncrement).unit;
+                    }
+                    else {
+                        dateAlignment = unit;
+                    }
+                }
+                else {
+                    dateAlignment = unit;
+                }
+            }
+            // if the view displays a single day or smaller
+            if (asRoughDays(duration) <= 1) {
+                if (this.isHiddenDay(start)) {
+                    start = this.skipHiddenDays(start, direction);
+                    start = startOfDay(start);
+                }
+            }
+            function computeRes() {
+                start = dateEnv.startOf(date, dateAlignment);
+                end = dateEnv.add(start, duration);
+                res = { start, end };
+            }
+            computeRes();
+            // if range is completely enveloped by hidden days, go past the hidden days
+            if (!this.trimHiddenDays(res)) {
+                date = this.skipHiddenDays(date, direction);
+                computeRes();
+            }
+            return res;
+        }
+        // Builds the "current" range when a dayCount is specified.
+        buildRangeFromDayCount(date, direction, dayCount) {
+            let { dateEnv, dateAlignment } = this.props;
+            let runningCount = 0;
+            let start = date;
+            let end;
+            if (dateAlignment) {
+                start = dateEnv.startOf(start, dateAlignment);
+            }
+            start = startOfDay(start);
+            start = this.skipHiddenDays(start, direction);
+            end = start;
+            do {
+                end = addDays(end, 1);
+                if (!this.isHiddenDay(end)) {
+                    runningCount += 1;
+                }
+            } while (runningCount < dayCount);
+            return { start, end };
+        }
+        // Builds a normalized range object for the "visible" range,
+        // which is a way to define the currentRange and activeRange at the same time.
+        buildCustomVisibleRange(date) {
+            let { props } = this;
+            let input = props.visibleRangeInput;
+            let simpleInput = typeof input === 'function'
+                ? input.call(props.calendarApi, props.dateEnv.toDate(date))
+                : input;
+            let range = this.refineRange(simpleInput);
+            if (range && (range.start == null || range.end == null)) {
+                return null;
+            }
+            return range;
+        }
+        // Computes the range that will represent the element/cells for *rendering*,
+        // but which may have voided days/times.
+        // not responsible for trimming hidden days.
+        buildRenderRange(currentRange, currentRangeUnit, isRangeAllDay) {
+            return currentRange;
+        }
+        // Compute the duration value that should be added/substracted to the current date
+        // when a prev/next operation happens.
+        buildDateIncrement(fallback) {
+            let { dateIncrement } = this.props;
+            let customAlignment;
+            if (dateIncrement) {
+                return dateIncrement;
+            }
+            if ((customAlignment = this.props.dateAlignment)) {
+                return createDuration(1, customAlignment);
+            }
+            if (fallback) {
+                return fallback;
+            }
+            return createDuration({ days: 1 });
+        }
+        refineRange(rangeInput) {
+            if (rangeInput) {
+                let range = parseRange(rangeInput, this.props.dateEnv);
+                if (range) {
+                    range = computeVisibleDayRange(range);
+                }
+                return range;
+            }
+            return null;
+        }
+        /* Hidden Days
+        ------------------------------------------------------------------------------------------------------------------*/
+        // Initializes internal variables related to calculating hidden days-of-week
+        initHiddenDays() {
+            let hiddenDays = this.props.hiddenDays || []; // array of day-of-week indices that are hidden
+            let isHiddenDayHash = []; // is the day-of-week hidden? (hash with day-of-week-index -> bool)
+            let dayCnt = 0;
+            let i;
+            if (this.props.weekends === false) {
+                hiddenDays.push(0, 6); // 0=sunday, 6=saturday
+            }
+            for (i = 0; i < 7; i += 1) {
+                if (!(isHiddenDayHash[i] = hiddenDays.indexOf(i) !== -1)) {
+                    dayCnt += 1;
+                }
+            }
+            if (!dayCnt) {
+                throw new Error('invalid hiddenDays'); // all days were hidden? bad.
+            }
+            this.isHiddenDayHash = isHiddenDayHash;
+        }
+        // Remove days from the beginning and end of the range that are computed as hidden.
+        // If the whole range is trimmed off, returns null
+        trimHiddenDays(range) {
+            let { start, end } = range;
+            if (start) {
+                start = this.skipHiddenDays(start);
+            }
+            if (end) {
+                end = this.skipHiddenDays(end, -1, true);
+            }
+            if (start == null || end == null || start < end) {
+                return { start, end };
+            }
+            return null;
+        }
+        // Is the current day hidden?
+        // `day` is a day-of-week index (0-6), or a Date (used for UTC)
+        isHiddenDay(day) {
+            if (day instanceof Date) {
+                day = day.getUTCDay();
+            }
+            return this.isHiddenDayHash[day];
+        }
+        // Incrementing the current day until it is no longer a hidden day, returning a copy.
+        // DOES NOT CONSIDER validRange!
+        // If the initial value of `date` is not a hidden day, don't do anything.
+        // Pass `isExclusive` as `true` if you are dealing with an end date.
+        // `inc` defaults to `1` (increment one day forward each time)
+        skipHiddenDays(date, inc = 1, isExclusive = false) {
+            while (this.isHiddenDayHash[(date.getUTCDay() + (isExclusive ? inc : 0) + 7) % 7]) {
+                date = addDays(date, inc);
+            }
+            return date;
+        }
+    }
+
+    function triggerDateSelect(selection, pev, context) {
+        context.emitter.trigger('select', Object.assign(Object.assign({}, buildDateSpanApiWithContext(selection, context)), { jsEvent: pev ? pev.origEvent : null, view: context.viewApi || context.calendarApi.view }));
+    }
+    function triggerDateUnselect(pev, context) {
+        context.emitter.trigger('unselect', {
+            jsEvent: pev ? pev.origEvent : null,
+            view: context.viewApi || context.calendarApi.view,
+        });
+    }
+    function buildDateSpanApiWithContext(dateSpan, context) {
+        let props = {};
+        for (let transform of context.pluginHooks.dateSpanTransforms) {
+            Object.assign(props, transform(dateSpan, context));
+        }
+        Object.assign(props, buildDateSpanApi(dateSpan, context.dateEnv));
+        return props;
+    }
+    // Given an event's allDay status and start date, return what its fallback end date should be.
+    // TODO: rename to computeDefaultEventEnd
+    function getDefaultEventEnd(allDay, marker, context) {
+        let { dateEnv, options } = context;
+        let end = marker;
+        if (allDay) {
+            end = startOfDay(end);
+            end = dateEnv.add(end, options.defaultAllDayEventDuration);
+        }
+        else {
+            end = dateEnv.add(end, options.defaultTimedEventDuration);
+        }
+        return end;
+    }
+
+    // applies the mutation to ALL defs/instances within the event store
+    function applyMutationToEventStore(eventStore, eventConfigBase, mutation, context) {
+        let eventConfigs = compileEventUis(eventStore.defs, eventConfigBase);
+        let dest = createEmptyEventStore();
+        for (let defId in eventStore.defs) {
+            let def = eventStore.defs[defId];
+            dest.defs[defId] = applyMutationToEventDef(def, eventConfigs[defId], mutation, context);
+        }
+        for (let instanceId in eventStore.instances) {
+            let instance = eventStore.instances[instanceId];
+            let def = dest.defs[instance.defId]; // important to grab the newly modified def
+            dest.instances[instanceId] = applyMutationToEventInstance(instance, def, eventConfigs[instance.defId], mutation, context);
+        }
+        return dest;
+    }
+    function applyMutationToEventDef(eventDef, eventConfig, mutation, context) {
+        let standardProps = mutation.standardProps || {};
+        // if hasEnd has not been specified, guess a good value based on deltas.
+        // if duration will change, there's no way the default duration will persist,
+        // and thus, we need to mark the event as having a real end
+        if (standardProps.hasEnd == null &&
+            eventConfig.durationEditable &&
+            (mutation.startDelta || mutation.endDelta)) {
+            standardProps.hasEnd = true; // TODO: is this mutation okay?
+        }
+        let copy = Object.assign(Object.assign(Object.assign({}, eventDef), standardProps), { ui: Object.assign(Object.assign({}, eventDef.ui), standardProps.ui) });
+        if (mutation.extendedProps) {
+            copy.extendedProps = Object.assign(Object.assign({}, copy.extendedProps), mutation.extendedProps);
+        }
+        for (let applier of context.pluginHooks.eventDefMutationAppliers) {
+            applier(copy, mutation, context);
+        }
+        if (!copy.hasEnd && context.options.forceEventDuration) {
+            copy.hasEnd = true;
+        }
+        return copy;
+    }
+    function applyMutationToEventInstance(eventInstance, eventDef, // must first be modified by applyMutationToEventDef
+    eventConfig, mutation, context) {
+        let { dateEnv } = context;
+        let forceAllDay = mutation.standardProps && mutation.standardProps.allDay === true;
+        let clearEnd = mutation.standardProps && mutation.standardProps.hasEnd === false;
+        let copy = Object.assign({}, eventInstance);
+        if (forceAllDay) {
+            copy.range = computeAlignedDayRange(copy.range);
+        }
+        if (mutation.datesDelta && eventConfig.startEditable) {
+            copy.range = {
+                start: dateEnv.add(copy.range.start, mutation.datesDelta),
+                end: dateEnv.add(copy.range.end, mutation.datesDelta),
+            };
+        }
+        if (mutation.startDelta && eventConfig.durationEditable) {
+            copy.range = {
+                start: dateEnv.add(copy.range.start, mutation.startDelta),
+                end: copy.range.end,
+            };
+        }
+        if (mutation.endDelta && eventConfig.durationEditable) {
+            copy.range = {
+                start: copy.range.start,
+                end: dateEnv.add(copy.range.end, mutation.endDelta),
+            };
+        }
+        if (clearEnd) {
+            copy.range = {
+                start: copy.range.start,
+                end: getDefaultEventEnd(eventDef.allDay, copy.range.start, context),
+            };
+        }
+        // in case event was all-day but the supplied deltas were not
+        // better util for this?
+        if (eventDef.allDay) {
+            copy.range = {
+                start: startOfDay(copy.range.start),
+                end: startOfDay(copy.range.end),
+            };
+        }
+        // handle invalid durations
+        if (copy.range.end < copy.range.start) {
+            copy.range.end = getDefaultEventEnd(eventDef.allDay, copy.range.start, context);
+        }
+        return copy;
+    }
+
+    class EventSourceImpl {
+        constructor(context, internalEventSource) {
+            this.context = context;
+            this.internalEventSource = internalEventSource;
+        }
+        remove() {
+            this.context.dispatch({
+                type: 'REMOVE_EVENT_SOURCE',
+                sourceId: this.internalEventSource.sourceId,
+            });
+        }
+        refetch() {
+            this.context.dispatch({
+                type: 'FETCH_EVENT_SOURCES',
+                sourceIds: [this.internalEventSource.sourceId],
+                isRefetch: true,
+            });
+        }
+        get id() {
+            return this.internalEventSource.publicId;
+        }
+        get url() {
+            return this.internalEventSource.meta.url;
+        }
+        get format() {
+            return this.internalEventSource.meta.format; // TODO: bad. not guaranteed
+        }
+    }
+
+    class EventImpl {
+        // instance will be null if expressing a recurring event that has no current instances,
+        // OR if trying to validate an incoming external event that has no dates assigned
+        constructor(context, def, instance) {
+            this._context = context;
+            this._def = def;
+            this._instance = instance || null;
+        }
+        /*
+        TODO: make event struct more responsible for this
+        */
+        setProp(name, val) {
+            if (name in EVENT_DATE_REFINERS) {
+                console.warn('Could not set date-related prop \'name\'. Use one of the date-related methods instead.');
+                // TODO: make proper aliasing system?
+            }
+            else if (name === 'id') {
+                val = EVENT_NON_DATE_REFINERS[name](val);
+                this.mutate({
+                    standardProps: { publicId: val }, // hardcoded internal name
+                });
+            }
+            else if (name in EVENT_NON_DATE_REFINERS) {
+                val = EVENT_NON_DATE_REFINERS[name](val);
+                this.mutate({
+                    standardProps: { [name]: val },
+                });
+            }
+            else if (name in EVENT_UI_REFINERS) {
+                let ui = EVENT_UI_REFINERS[name](val);
+                if (name === 'color') {
+                    ui = { backgroundColor: val, borderColor: val };
+                }
+                else if (name === 'editable') {
+                    ui = { startEditable: val, durationEditable: val };
+                }
+                else {
+                    ui = { [name]: val };
+                }
+                this.mutate({
+                    standardProps: { ui },
+                });
+            }
+            else {
+                console.warn(`Could not set prop '${name}'. Use setExtendedProp instead.`);
+            }
+        }
+        setExtendedProp(name, val) {
+            this.mutate({
+                extendedProps: { [name]: val },
+            });
+        }
+        setStart(startInput, options = {}) {
+            let { dateEnv } = this._context;
+            let start = dateEnv.createMarker(startInput);
+            if (start && this._instance) { // TODO: warning if parsed bad
+                let instanceRange = this._instance.range;
+                let startDelta = diffDates(instanceRange.start, start, dateEnv, options.granularity); // what if parsed bad!?
+                if (options.maintainDuration) {
+                    this.mutate({ datesDelta: startDelta });
+                }
+                else {
+                    this.mutate({ startDelta });
+                }
+            }
+        }
+        setEnd(endInput, options = {}) {
+            let { dateEnv } = this._context;
+            let end;
+            if (endInput != null) {
+                end = dateEnv.createMarker(endInput);
+                if (!end) {
+                    return; // TODO: warning if parsed bad
+                }
+            }
+            if (this._instance) {
+                if (end) {
+                    let endDelta = diffDates(this._instance.range.end, end, dateEnv, options.granularity);
+                    this.mutate({ endDelta });
+                }
+                else {
+                    this.mutate({ standardProps: { hasEnd: false } });
+                }
+            }
+        }
+        setDates(startInput, endInput, options = {}) {
+            let { dateEnv } = this._context;
+            let standardProps = { allDay: options.allDay };
+            let start = dateEnv.createMarker(startInput);
+            let end;
+            if (!start) {
+                return; // TODO: warning if parsed bad
+            }
+            if (endInput != null) {
+                end = dateEnv.createMarker(endInput);
+                if (!end) { // TODO: warning if parsed bad
+                    return;
+                }
+            }
+            if (this._instance) {
+                let instanceRange = this._instance.range;
+                // when computing the diff for an event being converted to all-day,
+                // compute diff off of the all-day values the way event-mutation does.
+                if (options.allDay === true) {
+                    instanceRange = computeAlignedDayRange(instanceRange);
+                }
+                let startDelta = diffDates(instanceRange.start, start, dateEnv, options.granularity);
+                if (end) {
+                    let endDelta = diffDates(instanceRange.end, end, dateEnv, options.granularity);
+                    if (durationsEqual(startDelta, endDelta)) {
+                        this.mutate({ datesDelta: startDelta, standardProps });
+                    }
+                    else {
+                        this.mutate({ startDelta, endDelta, standardProps });
+                    }
+                }
+                else { // means "clear the end"
+                    standardProps.hasEnd = false;
+                    this.mutate({ datesDelta: startDelta, standardProps });
+                }
+            }
+        }
+        moveStart(deltaInput) {
+            let delta = createDuration(deltaInput);
+            if (delta) { // TODO: warning if parsed bad
+                this.mutate({ startDelta: delta });
+            }
+        }
+        moveEnd(deltaInput) {
+            let delta = createDuration(deltaInput);
+            if (delta) { // TODO: warning if parsed bad
+                this.mutate({ endDelta: delta });
+            }
+        }
+        moveDates(deltaInput) {
+            let delta = createDuration(deltaInput);
+            if (delta) { // TODO: warning if parsed bad
+                this.mutate({ datesDelta: delta });
+            }
+        }
+        setAllDay(allDay, options = {}) {
+            let standardProps = { allDay };
+            let { maintainDuration } = options;
+            if (maintainDuration == null) {
+                maintainDuration = this._context.options.allDayMaintainDuration;
+            }
+            if (this._def.allDay !== allDay) {
+                standardProps.hasEnd = maintainDuration;
+            }
+            this.mutate({ standardProps });
+        }
+        formatRange(formatInput) {
+            let { dateEnv } = this._context;
+            let instance = this._instance;
+            let formatter = createFormatter(formatInput);
+            if (this._def.hasEnd) {
+                return dateEnv.formatRange(instance.range.start, instance.range.end, formatter, {
+                    forcedStartTzo: instance.forcedStartTzo,
+                    forcedEndTzo: instance.forcedEndTzo,
+                });
+            }
+            return dateEnv.format(instance.range.start, formatter, {
+                forcedTzo: instance.forcedStartTzo,
+            });
+        }
+        mutate(mutation) {
+            let instance = this._instance;
+            if (instance) {
+                let def = this._def;
+                let context = this._context;
+                let { eventStore } = context.getCurrentData();
+                let relevantEvents = getRelevantEvents(eventStore, instance.instanceId);
+                let eventConfigBase = {
+                    '': {
+                        display: '',
+                        startEditable: true,
+                        durationEditable: true,
+                        constraints: [],
+                        overlap: null,
+                        allows: [],
+                        backgroundColor: '',
+                        borderColor: '',
+                        textColor: '',
+                        classNames: [],
+                    },
+                };
+                relevantEvents = applyMutationToEventStore(relevantEvents, eventConfigBase, mutation, context);
+                let oldEvent = new EventImpl(context, def, instance); // snapshot
+                this._def = relevantEvents.defs[def.defId];
+                this._instance = relevantEvents.instances[instance.instanceId];
+                context.dispatch({
+                    type: 'MERGE_EVENTS',
+                    eventStore: relevantEvents,
+                });
+                context.emitter.trigger('eventChange', {
+                    oldEvent,
+                    event: this,
+                    relatedEvents: buildEventApis(relevantEvents, context, instance),
+                    revert() {
+                        context.dispatch({
+                            type: 'RESET_EVENTS',
+                            eventStore, // the ORIGINAL store
+                        });
+                    },
+                });
+            }
+        }
+        remove() {
+            let context = this._context;
+            let asStore = eventApiToStore(this);
+            context.dispatch({
+                type: 'REMOVE_EVENTS',
+                eventStore: asStore,
+            });
+            context.emitter.trigger('eventRemove', {
+                event: this,
+                relatedEvents: [],
+                revert() {
+                    context.dispatch({
+                        type: 'MERGE_EVENTS',
+                        eventStore: asStore,
+                    });
+                },
+            });
+        }
+        get source() {
+            let { sourceId } = this._def;
+            if (sourceId) {
+                return new EventSourceImpl(this._context, this._context.getCurrentData().eventSources[sourceId]);
+            }
+            return null;
+        }
+        get start() {
+            return this._instance ?
+                this._context.dateEnv.toDate(this._instance.range.start) :
+                null;
+        }
+        get end() {
+            return (this._instance && this._def.hasEnd) ?
+                this._context.dateEnv.toDate(this._instance.range.end) :
+                null;
+        }
+        get startStr() {
+            let instance = this._instance;
+            if (instance) {
+                return this._context.dateEnv.formatIso(instance.range.start, {
+                    omitTime: this._def.allDay,
+                    forcedTzo: instance.forcedStartTzo,
+                });
+            }
+            return '';
+        }
+        get endStr() {
+            let instance = this._instance;
+            if (instance && this._def.hasEnd) {
+                return this._context.dateEnv.formatIso(instance.range.end, {
+                    omitTime: this._def.allDay,
+                    forcedTzo: instance.forcedEndTzo,
+                });
+            }
+            return '';
+        }
+        // computable props that all access the def
+        // TODO: find a TypeScript-compatible way to do this at scale
+        get id() { return this._def.publicId; }
+        get groupId() { return this._def.groupId; }
+        get allDay() { return this._def.allDay; }
+        get title() { return this._def.title; }
+        get url() { return this._def.url; }
+        get display() { return this._def.ui.display || 'auto'; } // bad. just normalize the type earlier
+        get startEditable() { return this._def.ui.startEditable; }
+        get durationEditable() { return this._def.ui.durationEditable; }
+        get constraint() { return this._def.ui.constraints[0] || null; }
+        get overlap() { return this._def.ui.overlap; }
+        get allow() { return this._def.ui.allows[0] || null; }
+        get backgroundColor() { return this._def.ui.backgroundColor; }
+        get borderColor() { return this._def.ui.borderColor; }
+        get textColor() { return this._def.ui.textColor; }
+        // NOTE: user can't modify these because Object.freeze was called in event-def parsing
+        get classNames() { return this._def.ui.classNames; }
+        get extendedProps() { return this._def.extendedProps; }
+        toPlainObject(settings = {}) {
+            let def = this._def;
+            let { ui } = def;
+            let { startStr, endStr } = this;
+            let res = {
+                allDay: def.allDay,
+            };
+            if (def.title) {
+                res.title = def.title;
+            }
+            if (startStr) {
+                res.start = startStr;
+            }
+            if (endStr) {
+                res.end = endStr;
+            }
+            if (def.publicId) {
+                res.id = def.publicId;
+            }
+            if (def.groupId) {
+                res.groupId = def.groupId;
+            }
+            if (def.url) {
+                res.url = def.url;
+            }
+            if (ui.display && ui.display !== 'auto') {
+                res.display = ui.display;
+            }
+            // TODO: what about recurring-event properties???
+            // TODO: include startEditable/durationEditable/constraint/overlap/allow
+            if (settings.collapseColor && ui.backgroundColor && ui.backgroundColor === ui.borderColor) {
+                res.color = ui.backgroundColor;
+            }
+            else {
+                if (ui.backgroundColor) {
+                    res.backgroundColor = ui.backgroundColor;
+                }
+                if (ui.borderColor) {
+                    res.borderColor = ui.borderColor;
+                }
+            }
+            if (ui.textColor) {
+                res.textColor = ui.textColor;
+            }
+            if (ui.classNames.length) {
+                res.classNames = ui.classNames;
+            }
+            if (Object.keys(def.extendedProps).length) {
+                if (settings.collapseExtendedProps) {
+                    Object.assign(res, def.extendedProps);
+                }
+                else {
+                    res.extendedProps = def.extendedProps;
+                }
+            }
+            return res;
+        }
+        toJSON() {
+            return this.toPlainObject();
+        }
+    }
+    function eventApiToStore(eventApi) {
+        let def = eventApi._def;
+        let instance = eventApi._instance;
+        return {
+            defs: { [def.defId]: def },
+            instances: instance
+                ? { [instance.instanceId]: instance }
+                : {},
+        };
+    }
+    function buildEventApis(eventStore, context, excludeInstance) {
+        let { defs, instances } = eventStore;
+        let eventApis = [];
+        let excludeInstanceId = excludeInstance ? excludeInstance.instanceId : '';
+        for (let id in instances) {
+            let instance = instances[id];
+            let def = defs[instance.defId];
+            if (instance.instanceId !== excludeInstanceId) {
+                eventApis.push(new EventImpl(context, def, instance));
+            }
+        }
+        return eventApis;
+    }
+
+    /*
+    Specifying nextDayThreshold signals that all-day ranges should be sliced.
+    */
+    function sliceEventStore(eventStore, eventUiBases, framingRange, nextDayThreshold) {
+        let inverseBgByGroupId = {};
+        let inverseBgByDefId = {};
+        let defByGroupId = {};
+        let bgRanges = [];
+        let fgRanges = [];
+        let eventUis = compileEventUis(eventStore.defs, eventUiBases);
+        for (let defId in eventStore.defs) {
+            let def = eventStore.defs[defId];
+            let ui = eventUis[def.defId];
+            if (ui.display === 'inverse-background') {
+                if (def.groupId) {
+                    inverseBgByGroupId[def.groupId] = [];
+                    if (!defByGroupId[def.groupId]) {
+                        defByGroupId[def.groupId] = def;
+                    }
+                }
+                else {
+                    inverseBgByDefId[defId] = [];
+                }
+            }
+        }
+        for (let instanceId in eventStore.instances) {
+            let instance = eventStore.instances[instanceId];
+            let def = eventStore.defs[instance.defId];
+            let ui = eventUis[def.defId];
+            let origRange = instance.range;
+            let normalRange = (!def.allDay && nextDayThreshold) ?
+                computeVisibleDayRange(origRange, nextDayThreshold) :
+                origRange;
+            let slicedRange = intersectRanges(normalRange, framingRange);
+            if (slicedRange) {
+                if (ui.display === 'inverse-background') {
+                    if (def.groupId) {
+                        inverseBgByGroupId[def.groupId].push(slicedRange);
+                    }
+                    else {
+                        inverseBgByDefId[instance.defId].push(slicedRange);
+                    }
+                }
+                else if (ui.display !== 'none') {
+                    (ui.display === 'background' ? bgRanges : fgRanges).push({
+                        def,
+                        ui,
+                        instance,
+                        range: slicedRange,
+                        isStart: normalRange.start && normalRange.start.valueOf() === slicedRange.start.valueOf(),
+                        isEnd: normalRange.end && normalRange.end.valueOf() === slicedRange.end.valueOf(),
+                    });
+                }
+            }
+        }
+        for (let groupId in inverseBgByGroupId) { // BY GROUP
+            let ranges = inverseBgByGroupId[groupId];
+            let invertedRanges = invertRanges(ranges, framingRange);
+            for (let invertedRange of invertedRanges) {
+                let def = defByGroupId[groupId];
+                let ui = eventUis[def.defId];
+                bgRanges.push({
+                    def,
+                    ui,
+                    instance: null,
+                    range: invertedRange,
+                    isStart: false,
+                    isEnd: false,
+                });
+            }
+        }
+        for (let defId in inverseBgByDefId) {
+            let ranges = inverseBgByDefId[defId];
+            let invertedRanges = invertRanges(ranges, framingRange);
+            for (let invertedRange of invertedRanges) {
+                bgRanges.push({
+                    def: eventStore.defs[defId],
+                    ui: eventUis[defId],
+                    instance: null,
+                    range: invertedRange,
+                    isStart: false,
+                    isEnd: false,
+                });
+            }
+        }
+        return { bg: bgRanges, fg: fgRanges };
+    }
+    function hasBgRendering(def) {
+        return def.ui.display === 'background' || def.ui.display === 'inverse-background';
+    }
+    function setElSeg(el, seg) {
+        el.fcSeg = seg;
+    }
+    function getElSeg(el) {
+        return el.fcSeg ||
+            el.parentNode.fcSeg || // for the harness
+            null;
+    }
+    // event ui computation
+    function compileEventUis(eventDefs, eventUiBases) {
+        return mapHash(eventDefs, (eventDef) => compileEventUi(eventDef, eventUiBases));
+    }
+    function compileEventUi(eventDef, eventUiBases) {
+        let uis = [];
+        if (eventUiBases['']) {
+            uis.push(eventUiBases['']);
+        }
+        if (eventUiBases[eventDef.defId]) {
+            uis.push(eventUiBases[eventDef.defId]);
+        }
+        uis.push(eventDef.ui);
+        return combineEventUis(uis);
+    }
+    function sortEventSegs(segs, eventOrderSpecs) {
+        let objs = segs.map(buildSegCompareObj);
+        objs.sort((obj0, obj1) => compareByFieldSpecs(obj0, obj1, eventOrderSpecs));
+        return objs.map((c) => c._seg);
+    }
+    // returns a object with all primitive props that can be compared
+    function buildSegCompareObj(seg) {
+        let { eventRange } = seg;
+        let eventDef = eventRange.def;
+        let range = eventRange.instance ? eventRange.instance.range : eventRange.range;
+        let start = range.start ? range.start.valueOf() : 0; // TODO: better support for open-range events
+        let end = range.end ? range.end.valueOf() : 0; // "
+        return Object.assign(Object.assign(Object.assign({}, eventDef.extendedProps), eventDef), { id: eventDef.publicId, start,
+            end, duration: end - start, allDay: Number(eventDef.allDay), _seg: seg });
+    }
+    function computeSegDraggable(seg, context) {
+        let { pluginHooks } = context;
+        let transformers = pluginHooks.isDraggableTransformers;
+        let { def, ui } = seg.eventRange;
+        let val = ui.startEditable;
+        for (let transformer of transformers) {
+            val = transformer(val, def, ui, context);
+        }
+        return val;
+    }
+    function computeSegStartResizable(seg, context) {
+        return seg.isStart && seg.eventRange.ui.durationEditable && context.options.eventResizableFromStart;
+    }
+    function computeSegEndResizable(seg, context) {
+        return seg.isEnd && seg.eventRange.ui.durationEditable;
+    }
+    function buildSegTimeText(seg, timeFormat, context, defaultDisplayEventTime, // defaults to true
+    defaultDisplayEventEnd, // defaults to true
+    startOverride, endOverride) {
+        let { dateEnv, options } = context;
+        let { displayEventTime, displayEventEnd } = options;
+        let eventDef = seg.eventRange.def;
+        let eventInstance = seg.eventRange.instance;
+        if (displayEventTime == null) {
+            displayEventTime = defaultDisplayEventTime !== false;
+        }
+        if (displayEventEnd == null) {
+            displayEventEnd = defaultDisplayEventEnd !== false;
+        }
+        let wholeEventStart = eventInstance.range.start;
+        let wholeEventEnd = eventInstance.range.end;
+        let segStart = startOverride || seg.start || seg.eventRange.range.start;
+        let segEnd = endOverride || seg.end || seg.eventRange.range.end;
+        let isStartDay = startOfDay(wholeEventStart).valueOf() === startOfDay(segStart).valueOf();
+        let isEndDay = startOfDay(addMs(wholeEventEnd, -1)).valueOf() === startOfDay(addMs(segEnd, -1)).valueOf();
+        if (displayEventTime && !eventDef.allDay && (isStartDay || isEndDay)) {
+            segStart = isStartDay ? wholeEventStart : segStart;
+            segEnd = isEndDay ? wholeEventEnd : segEnd;
+            if (displayEventEnd && eventDef.hasEnd) {
+                return dateEnv.formatRange(segStart, segEnd, timeFormat, {
+                    forcedStartTzo: startOverride ? null : eventInstance.forcedStartTzo,
+                    forcedEndTzo: endOverride ? null : eventInstance.forcedEndTzo,
+                });
+            }
+            return dateEnv.format(segStart, timeFormat, {
+                forcedTzo: startOverride ? null : eventInstance.forcedStartTzo, // nooooo, same
+            });
+        }
+        return '';
+    }
+    function getSegMeta(seg, todayRange, nowDate) {
+        let segRange = seg.eventRange.range;
+        return {
+            isPast: segRange.end <= (nowDate || todayRange.start),
+            isFuture: segRange.start >= (nowDate || todayRange.end),
+            isToday: todayRange && rangeContainsMarker(todayRange, segRange.start),
+        };
+    }
+    function getEventClassNames(props) {
+        let classNames = ['fc-event'];
+        if (props.isMirror) {
+            classNames.push('fc-event-mirror');
+        }
+        if (props.isDraggable) {
+            classNames.push('fc-event-draggable');
+        }
+        if (props.isStartResizable || props.isEndResizable) {
+            classNames.push('fc-event-resizable');
+        }
+        if (props.isDragging) {
+            classNames.push('fc-event-dragging');
+        }
+        if (props.isResizing) {
+            classNames.push('fc-event-resizing');
+        }
+        if (props.isSelected) {
+            classNames.push('fc-event-selected');
+        }
+        if (props.isStart) {
+            classNames.push('fc-event-start');
+        }
+        if (props.isEnd) {
+            classNames.push('fc-event-end');
+        }
+        if (props.isPast) {
+            classNames.push('fc-event-past');
+        }
+        if (props.isToday) {
+            classNames.push('fc-event-today');
+        }
+        if (props.isFuture) {
+            classNames.push('fc-event-future');
+        }
+        return classNames;
+    }
+    function buildEventRangeKey(eventRange) {
+        return eventRange.instance
+            ? eventRange.instance.instanceId
+            : `${eventRange.def.defId}:${eventRange.range.start.toISOString()}`;
+        // inverse-background events don't have specific instances. TODO: better solution
+    }
+    function getSegAnchorAttrs(seg, context) {
+        let { def, instance } = seg.eventRange;
+        let { url } = def;
+        if (url) {
+            return { href: url };
+        }
+        let { emitter, options } = context;
+        let { eventInteractive } = options;
+        if (eventInteractive == null) {
+            eventInteractive = def.interactive;
+            if (eventInteractive == null) {
+                eventInteractive = Boolean(emitter.hasHandlers('eventClick'));
+            }
+        }
+        // mock what happens in EventClicking
+        if (eventInteractive) {
+            // only attach keyboard-related handlers because click handler is already done in EventClicking
+            return createAriaKeyboardAttrs((ev) => {
+                emitter.trigger('eventClick', {
+                    el: ev.target,
+                    event: new EventImpl(context, def, instance),
+                    jsEvent: ev,
+                    view: context.viewApi,
+                });
+            });
+        }
+        return {};
+    }
+
+    const STANDARD_PROPS = {
+        start: identity,
+        end: identity,
+        allDay: Boolean,
+    };
+    function parseDateSpan(raw, dateEnv, defaultDuration) {
+        let span = parseOpenDateSpan(raw, dateEnv);
+        let { range } = span;
+        if (!range.start) {
+            return null;
+        }
+        if (!range.end) {
+            if (defaultDuration == null) {
+                return null;
+            }
+            range.end = dateEnv.add(range.start, defaultDuration);
+        }
+        return span;
+    }
+    /*
+    TODO: somehow combine with parseRange?
+    Will return null if the start/end props were present but parsed invalidly.
+    */
+    function parseOpenDateSpan(raw, dateEnv) {
+        let { refined: standardProps, extra } = refineProps(raw, STANDARD_PROPS);
+        let startMeta = standardProps.start ? dateEnv.createMarkerMeta(standardProps.start) : null;
+        let endMeta = standardProps.end ? dateEnv.createMarkerMeta(standardProps.end) : null;
+        let { allDay } = standardProps;
+        if (allDay == null) {
+            allDay = (startMeta && startMeta.isTimeUnspecified) &&
+                (!endMeta || endMeta.isTimeUnspecified);
+        }
+        return Object.assign({ range: {
+                start: startMeta ? startMeta.marker : null,
+                end: endMeta ? endMeta.marker : null,
+            }, allDay }, extra);
+    }
+    function isDateSpansEqual(span0, span1) {
+        return rangesEqual(span0.range, span1.range) &&
+            span0.allDay === span1.allDay &&
+            isSpanPropsEqual(span0, span1);
+    }
+    // the NON-DATE-RELATED props
+    function isSpanPropsEqual(span0, span1) {
+        for (let propName in span1) {
+            if (propName !== 'range' && propName !== 'allDay') {
+                if (span0[propName] !== span1[propName]) {
+                    return false;
+                }
+            }
+        }
+        // are there any props that span0 has that span1 DOESN'T have?
+        // both have range/allDay, so no need to special-case.
+        for (let propName in span0) {
+            if (!(propName in span1)) {
+                return false;
+            }
+        }
+        return true;
+    }
+    function buildDateSpanApi(span, dateEnv) {
+        return Object.assign(Object.assign({}, buildRangeApi(span.range, dateEnv, span.allDay)), { allDay: span.allDay });
+    }
+    function buildRangeApiWithTimeZone(range, dateEnv, omitTime) {
+        return Object.assign(Object.assign({}, buildRangeApi(range, dateEnv, omitTime)), { timeZone: dateEnv.timeZone });
+    }
+    function buildRangeApi(range, dateEnv, omitTime) {
+        return {
+            start: dateEnv.toDate(range.start),
+            end: dateEnv.toDate(range.end),
+            startStr: dateEnv.formatIso(range.start, { omitTime }),
+            endStr: dateEnv.formatIso(range.end, { omitTime }),
+        };
+    }
+    function fabricateEventRange(dateSpan, eventUiBases, context) {
+        let res = refineEventDef({ editable: false }, context);
+        let def = parseEventDef(res.refined, res.extra, '', // sourceId
+        dateSpan.allDay, true, // hasEnd
+        context);
+        return {
+            def,
+            ui: compileEventUi(def, eventUiBases),
+            instance: createEventInstance(def.defId, dateSpan.range),
+            range: dateSpan.range,
+            isStart: true,
+            isEnd: true,
+        };
+    }
+
+    let calendarSystemClassMap = {};
+    function registerCalendarSystem(name, theClass) {
+        calendarSystemClassMap[name] = theClass;
+    }
+    function createCalendarSystem(name) {
+        return new calendarSystemClassMap[name]();
+    }
+    class GregorianCalendarSystem {
+        getMarkerYear(d) {
+            return d.getUTCFullYear();
+        }
+        getMarkerMonth(d) {
+            return d.getUTCMonth();
+        }
+        getMarkerDay(d) {
+            return d.getUTCDate();
+        }
+        arrayToMarker(arr) {
+            return arrayToUtcDate(arr);
+        }
+        markerToArray(marker) {
+            return dateToUtcArray(marker);
+        }
+    }
+    registerCalendarSystem('gregory', GregorianCalendarSystem);
+
+    const ISO_RE = /^\s*(\d{4})(-?(\d{2})(-?(\d{2})([T ](\d{2}):?(\d{2})(:?(\d{2})(\.(\d+))?)?(Z|(([-+])(\d{2})(:?(\d{2}))?))?)?)?)?$/;
+    function parse(str) {
+        let m = ISO_RE.exec(str);
+        if (m) {
+            let marker = new Date(Date.UTC(Number(m[1]), m[3] ? Number(m[3]) - 1 : 0, Number(m[5] || 1), Number(m[7] || 0), Number(m[8] || 0), Number(m[10] || 0), m[12] ? Number(`0.${m[12]}`) * 1000 : 0));
+            if (isValidDate(marker)) {
+                let timeZoneOffset = null;
+                if (m[13]) {
+                    timeZoneOffset = (m[15] === '-' ? -1 : 1) * (Number(m[16] || 0) * 60 +
+                        Number(m[18] || 0));
+                }
+                return {
+                    marker,
+                    isTimeUnspecified: !m[6],
+                    timeZoneOffset,
+                };
+            }
+        }
+        return null;
+    }
+
+    class DateEnv {
+        constructor(settings) {
+            let timeZone = this.timeZone = settings.timeZone;
+            let isNamedTimeZone = timeZone !== 'local' && timeZone !== 'UTC';
+            if (settings.namedTimeZoneImpl && isNamedTimeZone) {
+                this.namedTimeZoneImpl = new settings.namedTimeZoneImpl(timeZone);
+            }
+            this.canComputeOffset = Boolean(!isNamedTimeZone || this.namedTimeZoneImpl);
+            this.calendarSystem = createCalendarSystem(settings.calendarSystem);
+            this.locale = settings.locale;
+            this.weekDow = settings.locale.week.dow;
+            this.weekDoy = settings.locale.week.doy;
+            if (settings.weekNumberCalculation === 'ISO') {
+                this.weekDow = 1;
+                this.weekDoy = 4;
+            }
+            if (typeof settings.firstDay === 'number') {
+                this.weekDow = settings.firstDay;
+            }
+            if (typeof settings.weekNumberCalculation === 'function') {
+                this.weekNumberFunc = settings.weekNumberCalculation;
+            }
+            this.weekText = settings.weekText != null ? settings.weekText : settings.locale.options.weekText;
+            this.weekTextLong = (settings.weekTextLong != null ? settings.weekTextLong : settings.locale.options.weekTextLong) || this.weekText;
+            this.cmdFormatter = settings.cmdFormatter;
+            this.defaultSeparator = settings.defaultSeparator;
+        }
+        // Creating / Parsing
+        createMarker(input) {
+            let meta = this.createMarkerMeta(input);
+            if (meta === null) {
+                return null;
+            }
+            return meta.marker;
+        }
+        createNowMarker() {
+            if (this.canComputeOffset) {
+                return this.timestampToMarker(new Date().valueOf());
+            }
+            // if we can't compute the current date val for a timezone,
+            // better to give the current local date vals than UTC
+            return arrayToUtcDate(dateToLocalArray(new Date()));
+        }
+        createMarkerMeta(input) {
+            if (typeof input === 'string') {
+                return this.parse(input);
+            }
+            let marker = null;
+            if (typeof input === 'number') {
+                marker = this.timestampToMarker(input);
+            }
+            else if (input instanceof Date) {
+                input = input.valueOf();
+                if (!isNaN(input)) {
+                    marker = this.timestampToMarker(input);
+                }
+            }
+            else if (Array.isArray(input)) {
+                marker = arrayToUtcDate(input);
+            }
+            if (marker === null || !isValidDate(marker)) {
+                return null;
+            }
+            return { marker, isTimeUnspecified: false, forcedTzo: null };
+        }
+        parse(s) {
+            let parts = parse(s);
+            if (parts === null) {
+                return null;
+            }
+            let { marker } = parts;
+            let forcedTzo = null;
+            if (parts.timeZoneOffset !== null) {
+                if (this.canComputeOffset) {
+                    marker = this.timestampToMarker(marker.valueOf() - parts.timeZoneOffset * 60 * 1000);
+                }
+                else {
+                    forcedTzo = parts.timeZoneOffset;
+                }
+            }
+            return { marker, isTimeUnspecified: parts.isTimeUnspecified, forcedTzo };
+        }
+        // Accessors
+        getYear(marker) {
+            return this.calendarSystem.getMarkerYear(marker);
+        }
+        getMonth(marker) {
+            return this.calendarSystem.getMarkerMonth(marker);
+        }
+        getDay(marker) {
+            return this.calendarSystem.getMarkerDay(marker);
+        }
+        // Adding / Subtracting
+        add(marker, dur) {
+            let a = this.calendarSystem.markerToArray(marker);
+            a[0] += dur.years;
+            a[1] += dur.months;
+            a[2] += dur.days;
+            a[6] += dur.milliseconds;
+            return this.calendarSystem.arrayToMarker(a);
+        }
+        subtract(marker, dur) {
+            let a = this.calendarSystem.markerToArray(marker);
+            a[0] -= dur.years;
+            a[1] -= dur.months;
+            a[2] -= dur.days;
+            a[6] -= dur.milliseconds;
+            return this.calendarSystem.arrayToMarker(a);
+        }
+        addYears(marker, n) {
+            let a = this.calendarSystem.markerToArray(marker);
+            a[0] += n;
+            return this.calendarSystem.arrayToMarker(a);
+        }
+        addMonths(marker, n) {
+            let a = this.calendarSystem.markerToArray(marker);
+            a[1] += n;
+            return this.calendarSystem.arrayToMarker(a);
+        }
+        // Diffing Whole Units
+        diffWholeYears(m0, m1) {
+            let { calendarSystem } = this;
+            if (timeAsMs(m0) === timeAsMs(m1) &&
+                calendarSystem.getMarkerDay(m0) === calendarSystem.getMarkerDay(m1) &&
+                calendarSystem.getMarkerMonth(m0) === calendarSystem.getMarkerMonth(m1)) {
+                return calendarSystem.getMarkerYear(m1) - calendarSystem.getMarkerYear(m0);
+            }
+            return null;
+        }
+        diffWholeMonths(m0, m1) {
+            let { calendarSystem } = this;
+            if (timeAsMs(m0) === timeAsMs(m1) &&
+                calendarSystem.getMarkerDay(m0) === calendarSystem.getMarkerDay(m1)) {
+                return (calendarSystem.getMarkerMonth(m1) - calendarSystem.getMarkerMonth(m0)) +
+                    (calendarSystem.getMarkerYear(m1) - calendarSystem.getMarkerYear(m0)) * 12;
+            }
+            return null;
+        }
+        // Range / Duration
+        greatestWholeUnit(m0, m1) {
+            let n = this.diffWholeYears(m0, m1);
+            if (n !== null) {
+                return { unit: 'year', value: n };
+            }
+            n = this.diffWholeMonths(m0, m1);
+            if (n !== null) {
+                return { unit: 'month', value: n };
+            }
+            n = diffWholeWeeks(m0, m1);
+            if (n !== null) {
+                return { unit: 'week', value: n };
+            }
+            n = diffWholeDays(m0, m1);
+            if (n !== null) {
+                return { unit: 'day', value: n };
+            }
+            n = diffHours(m0, m1);
+            if (isInt(n)) {
+                return { unit: 'hour', value: n };
+            }
+            n = diffMinutes(m0, m1);
+            if (isInt(n)) {
+                return { unit: 'minute', value: n };
+            }
+            n = diffSeconds(m0, m1);
+            if (isInt(n)) {
+                return { unit: 'second', value: n };
+            }
+            return { unit: 'millisecond', value: m1.valueOf() - m0.valueOf() };
+        }
+        countDurationsBetween(m0, m1, d) {
+            // TODO: can use greatestWholeUnit
+            let diff;
+            if (d.years) {
+                diff = this.diffWholeYears(m0, m1);
+                if (diff !== null) {
+                    return diff / asRoughYears(d);
+                }
+            }
+            if (d.months) {
+                diff = this.diffWholeMonths(m0, m1);
+                if (diff !== null) {
+                    return diff / asRoughMonths(d);
+                }
+            }
+            if (d.days) {
+                diff = diffWholeDays(m0, m1);
+                if (diff !== null) {
+                    return diff / asRoughDays(d);
+                }
+            }
+            return (m1.valueOf() - m0.valueOf()) / asRoughMs(d);
+        }
+        // Start-Of
+        // these DON'T return zoned-dates. only UTC start-of dates
+        startOf(m, unit) {
+            if (unit === 'year') {
+                return this.startOfYear(m);
+            }
+            if (unit === 'month') {
+                return this.startOfMonth(m);
+            }
+            if (unit === 'week') {
+                return this.startOfWeek(m);
+            }
+            if (unit === 'day') {
+                return startOfDay(m);
+            }
+            if (unit === 'hour') {
+                return startOfHour(m);
+            }
+            if (unit === 'minute') {
+                return startOfMinute(m);
+            }
+            if (unit === 'second') {
+                return startOfSecond(m);
+            }
+            return null;
+        }
+        startOfYear(m) {
+            return this.calendarSystem.arrayToMarker([
+                this.calendarSystem.getMarkerYear(m),
+            ]);
+        }
+        startOfMonth(m) {
+            return this.calendarSystem.arrayToMarker([
+                this.calendarSystem.getMarkerYear(m),
+                this.calendarSystem.getMarkerMonth(m),
+            ]);
+        }
+        startOfWeek(m) {
+            return this.calendarSystem.arrayToMarker([
+                this.calendarSystem.getMarkerYear(m),
+                this.calendarSystem.getMarkerMonth(m),
+                m.getUTCDate() - ((m.getUTCDay() - this.weekDow + 7) % 7),
+            ]);
+        }
+        // Week Number
+        computeWeekNumber(marker) {
+            if (this.weekNumberFunc) {
+                return this.weekNumberFunc(this.toDate(marker));
+            }
+            return weekOfYear(marker, this.weekDow, this.weekDoy);
+        }
+        // TODO: choke on timeZoneName: long
+        format(marker, formatter, dateOptions = {}) {
+            return formatter.format({
+                marker,
+                timeZoneOffset: dateOptions.forcedTzo != null ?
+                    dateOptions.forcedTzo :
+                    this.offsetForMarker(marker),
+            }, this);
+        }
+        formatRange(start, end, formatter, dateOptions = {}) {
+            if (dateOptions.isEndExclusive) {
+                end = addMs(end, -1);
+            }
+            return formatter.formatRange({
+                marker: start,
+                timeZoneOffset: dateOptions.forcedStartTzo != null ?
+                    dateOptions.forcedStartTzo :
+                    this.offsetForMarker(start),
+            }, {
+                marker: end,
+                timeZoneOffset: dateOptions.forcedEndTzo != null ?
+                    dateOptions.forcedEndTzo :
+                    this.offsetForMarker(end),
+            }, this, dateOptions.defaultSeparator);
+        }
+        /*
+        DUMB: the omitTime arg is dumb. if we omit the time, we want to omit the timezone offset. and if we do that,
+        might as well use buildIsoString or some other util directly
+        */
+        formatIso(marker, extraOptions = {}) {
+            let timeZoneOffset = null;
+            if (!extraOptions.omitTimeZoneOffset) {
+                if (extraOptions.forcedTzo != null) {
+                    timeZoneOffset = extraOptions.forcedTzo;
+                }
+                else {
+                    timeZoneOffset = this.offsetForMarker(marker);
+                }
+            }
+            return buildIsoString(marker, timeZoneOffset, extraOptions.omitTime);
+        }
+        // TimeZone
+        timestampToMarker(ms) {
+            if (this.timeZone === 'local') {
+                return arrayToUtcDate(dateToLocalArray(new Date(ms)));
+            }
+            if (this.timeZone === 'UTC' || !this.namedTimeZoneImpl) {
+                return new Date(ms);
+            }
+            return arrayToUtcDate(this.namedTimeZoneImpl.timestampToArray(ms));
+        }
+        offsetForMarker(m) {
+            if (this.timeZone === 'local') {
+                return -arrayToLocalDate(dateToUtcArray(m)).getTimezoneOffset(); // convert "inverse" offset to "normal" offset
+            }
+            if (this.timeZone === 'UTC') {
+                return 0;
+            }
+            if (this.namedTimeZoneImpl) {
+                return this.namedTimeZoneImpl.offsetForArray(dateToUtcArray(m));
+            }
+            return null;
+        }
+        // Conversion
+        toDate(m, forcedTzo) {
+            if (this.timeZone === 'local') {
+                return arrayToLocalDate(dateToUtcArray(m));
+            }
+            if (this.timeZone === 'UTC') {
+                return new Date(m.valueOf()); // make sure it's a copy
+            }
+            if (!this.namedTimeZoneImpl) {
+                return new Date(m.valueOf() - (forcedTzo || 0));
+            }
+            return new Date(m.valueOf() -
+                this.namedTimeZoneImpl.offsetForArray(dateToUtcArray(m)) * 1000 * 60);
+        }
+    }
+
+    class NamedTimeZoneImpl {
+        constructor(timeZoneName) {
+            this.timeZoneName = timeZoneName;
+        }
+    }
+
+    class SegHierarchy {
+        constructor(getEntryThickness = (entry) => {
+            // if no thickness known, assume 1 (if 0, so small it always fits)
+            return entry.thickness || 1;
+        }) {
+            this.getEntryThickness = getEntryThickness;
+            // settings
+            this.strictOrder = false;
+            this.allowReslicing = false;
+            this.maxCoord = -1; // -1 means no max
+            this.maxStackCnt = -1; // -1 means no max
+            this.levelCoords = []; // ordered
+            this.entriesByLevel = []; // parallel with levelCoords
+            this.stackCnts = {}; // TODO: use better technique!?
+        }
+        addSegs(inputs) {
+            let hiddenEntries = [];
+            for (let input of inputs) {
+                this.insertEntry(input, hiddenEntries);
+            }
+            return hiddenEntries;
+        }
+        insertEntry(entry, hiddenEntries) {
+            let insertion = this.findInsertion(entry);
+            if (this.isInsertionValid(insertion, entry)) {
+                this.insertEntryAt(entry, insertion);
+            }
+            else {
+                this.handleInvalidInsertion(insertion, entry, hiddenEntries);
+            }
+        }
+        isInsertionValid(insertion, entry) {
+            return (this.maxCoord === -1 || insertion.levelCoord + this.getEntryThickness(entry) <= this.maxCoord) &&
+                (this.maxStackCnt === -1 || insertion.stackCnt < this.maxStackCnt);
+        }
+        handleInvalidInsertion(insertion, entry, hiddenEntries) {
+            if (this.allowReslicing && insertion.touchingEntry) {
+                const hiddenEntry = Object.assign(Object.assign({}, entry), { span: intersectSpans(entry.span, insertion.touchingEntry.span) });
+                hiddenEntries.push(hiddenEntry);
+                this.splitEntry(entry, insertion.touchingEntry, hiddenEntries);
+            }
+            else {
+                hiddenEntries.push(entry);
+            }
+        }
+        /*
+        Does NOT add what hit the `barrier` into hiddenEntries. Should already be done.
+        */
+        splitEntry(entry, barrier, hiddenEntries) {
+            let entrySpan = entry.span;
+            let barrierSpan = barrier.span;
+            if (entrySpan.start < barrierSpan.start) {
+                this.insertEntry({
+                    index: entry.index,
+                    thickness: entry.thickness,
+                    span: { start: entrySpan.start, end: barrierSpan.start },
+                }, hiddenEntries);
+            }
+            if (entrySpan.end > barrierSpan.end) {
+                this.insertEntry({
+                    index: entry.index,
+                    thickness: entry.thickness,
+                    span: { start: barrierSpan.end, end: entrySpan.end },
+                }, hiddenEntries);
+            }
+        }
+        insertEntryAt(entry, insertion) {
+            let { entriesByLevel, levelCoords } = this;
+            if (insertion.lateral === -1) {
+                // create a new level
+                insertAt(levelCoords, insertion.level, insertion.levelCoord);
+                insertAt(entriesByLevel, insertion.level, [entry]);
+            }
+            else {
+                // insert into existing level
+                insertAt(entriesByLevel[insertion.level], insertion.lateral, entry);
+            }
+            this.stackCnts[buildEntryKey(entry)] = insertion.stackCnt;
+        }
+        /*
+        does not care about limits
+        */
+        findInsertion(newEntry) {
+            let { levelCoords, entriesByLevel, strictOrder, stackCnts } = this;
+            let levelCnt = levelCoords.length;
+            let candidateCoord = 0;
+            let touchingLevel = -1;
+            let touchingLateral = -1;
+            let touchingEntry = null;
+            let stackCnt = 0;
+            for (let trackingLevel = 0; trackingLevel < levelCnt; trackingLevel += 1) {
+                const trackingCoord = levelCoords[trackingLevel];
+                // if the current level is past the placed entry, we have found a good empty space and can stop.
+                // if strictOrder, keep finding more lateral intersections.
+                if (!strictOrder && trackingCoord >= candidateCoord + this.getEntryThickness(newEntry)) {
+                    break;
+                }
+                let trackingEntries = entriesByLevel[trackingLevel];
+                let trackingEntry;
+                let searchRes = binarySearch(trackingEntries, newEntry.span.start, getEntrySpanEnd); // find first entry after newEntry's end
+                let lateralIndex = searchRes[0] + searchRes[1]; // if exact match (which doesn't collide), go to next one
+                while ( // loop through entries that horizontally intersect
+                (trackingEntry = trackingEntries[lateralIndex]) && // but not past the whole entry list
+                    trackingEntry.span.start < newEntry.span.end // and not entirely past newEntry
+                ) {
+                    let trackingEntryBottom = trackingCoord + this.getEntryThickness(trackingEntry);
+                    // intersects into the top of the candidate?
+                    if (trackingEntryBottom > candidateCoord) {
+                        candidateCoord = trackingEntryBottom;
+                        touchingEntry = trackingEntry;
+                        touchingLevel = trackingLevel;
+                        touchingLateral = lateralIndex;
+                    }
+                    // butts up against top of candidate? (will happen if just intersected as well)
+                    if (trackingEntryBottom === candidateCoord) {
+                        // accumulate the highest possible stackCnt of the trackingEntries that butt up
+                        stackCnt = Math.max(stackCnt, stackCnts[buildEntryKey(trackingEntry)] + 1);
+                    }
+                    lateralIndex += 1;
+                }
+            }
+            // the destination level will be after touchingEntry's level. find it
+            let destLevel = 0;
+            if (touchingEntry) {
+                destLevel = touchingLevel + 1;
+                while (destLevel < levelCnt && levelCoords[destLevel] < candidateCoord) {
+                    destLevel += 1;
+                }
+            }
+            // if adding to an existing level, find where to insert
+            let destLateral = -1;
+            if (destLevel < levelCnt && levelCoords[destLevel] === candidateCoord) {
+                destLateral = binarySearch(entriesByLevel[destLevel], newEntry.span.end, getEntrySpanEnd)[0];
+            }
+            return {
+                touchingLevel,
+                touchingLateral,
+                touchingEntry,
+                stackCnt,
+                levelCoord: candidateCoord,
+                level: destLevel,
+                lateral: destLateral,
+            };
+        }
+        // sorted by levelCoord (lowest to highest)
+        toRects() {
+            let { entriesByLevel, levelCoords } = this;
+            let levelCnt = entriesByLevel.length;
+            let rects = [];
+            for (let level = 0; level < levelCnt; level += 1) {
+                let entries = entriesByLevel[level];
+                let levelCoord = levelCoords[level];
+                for (let entry of entries) {
+                    rects.push(Object.assign(Object.assign({}, entry), { thickness: this.getEntryThickness(entry), levelCoord }));
+                }
+            }
+            return rects;
+        }
+    }
+    function getEntrySpanEnd(entry) {
+        return entry.span.end;
+    }
+    function buildEntryKey(entry) {
+        return entry.index + ':' + entry.span.start;
+    }
+    // returns groups with entries sorted by input order
+    function groupIntersectingEntries(entries) {
+        let merges = [];
+        for (let entry of entries) {
+            let filteredMerges = [];
+            let hungryMerge = {
+                span: entry.span,
+                entries: [entry],
+            };
+            for (let merge of merges) {
+                if (intersectSpans(merge.span, hungryMerge.span)) {
+                    hungryMerge = {
+                        entries: merge.entries.concat(hungryMerge.entries),
+                        span: joinSpans(merge.span, hungryMerge.span),
+                    };
+                }
+                else {
+                    filteredMerges.push(merge);
+                }
+            }
+            filteredMerges.push(hungryMerge);
+            merges = filteredMerges;
+        }
+        return merges;
+    }
+    function joinSpans(span0, span1) {
+        return {
+            start: Math.min(span0.start, span1.start),
+            end: Math.max(span0.end, span1.end),
+        };
+    }
+    function intersectSpans(span0, span1) {
+        let start = Math.max(span0.start, span1.start);
+        let end = Math.min(span0.end, span1.end);
+        if (start < end) {
+            return { start, end };
+        }
+        return null;
+    }
+    // general util
+    // ---------------------------------------------------------------------------------------------------------------------
+    function insertAt(arr, index, item) {
+        arr.splice(index, 0, item);
+    }
+    function binarySearch(a, searchVal, getItemVal) {
+        let startIndex = 0;
+        let endIndex = a.length; // exclusive
+        if (!endIndex || searchVal < getItemVal(a[startIndex])) { // no items OR before first item
+            return [0, 0];
+        }
+        if (searchVal > getItemVal(a[endIndex - 1])) { // after last item
+            return [endIndex, 0];
+        }
+        while (startIndex < endIndex) {
+            let middleIndex = Math.floor(startIndex + (endIndex - startIndex) / 2);
+            let middleVal = getItemVal(a[middleIndex]);
+            if (searchVal < middleVal) {
+                endIndex = middleIndex;
+            }
+            else if (searchVal > middleVal) {
+                startIndex = middleIndex + 1;
+            }
+            else { // equal!
+                return [middleIndex, 1];
+            }
+        }
+        return [startIndex, 0];
+    }
+
+    class Interaction {
+        constructor(settings) {
+            this.component = settings.component;
+            this.isHitComboAllowed = settings.isHitComboAllowed || null;
+        }
+        destroy() {
+        }
+    }
+    function parseInteractionSettings(component, input) {
+        return {
+            component,
+            el: input.el,
+            useEventCenter: input.useEventCenter != null ? input.useEventCenter : true,
+            isHitComboAllowed: input.isHitComboAllowed || null,
+        };
+    }
+    function interactionSettingsToStore(settings) {
+        return {
+            [settings.component.uid]: settings,
+        };
+    }
+    // global state
+    const interactionSettingsStore = {};
+
+    /*
+    An abstraction for a dragging interaction originating on an event.
+    Does higher-level things than PointerDragger, such as possibly:
+    - a "mirror" that moves with the pointer
+    - a minimum number of pixels or other criteria for a true drag to begin
+
+    subclasses must emit:
+    - pointerdown
+    - dragstart
+    - dragmove
+    - pointerup
+    - dragend
+    */
+    class ElementDragging {
+        constructor(el, selector) {
+            this.emitter = new Emitter();
+        }
+        destroy() {
+        }
+        setMirrorIsVisible(bool) {
+            // optional if subclass doesn't want to support a mirror
+        }
+        setMirrorNeedsRevert(bool) {
+            // optional if subclass doesn't want to support a mirror
+        }
+        setAutoScrollEnabled(bool) {
+            // optional
+        }
+    }
+
+    // TODO: get rid of this in favor of options system,
+    // tho it's really easy to access this globally rather than pass thru options.
+    const config = {};
+
+    /*
+    Information about what will happen when an external element is dragged-and-dropped
+    onto a calendar. Contains information for creating an event.
+    */
+    const DRAG_META_REFINERS = {
+        startTime: createDuration,
+        duration: createDuration,
+        create: Boolean,
+        sourceId: String,
+    };
+    function parseDragMeta(raw) {
+        let { refined, extra } = refineProps(raw, DRAG_META_REFINERS);
+        return {
+            startTime: refined.startTime || null,
+            duration: refined.duration || null,
+            create: refined.create != null ? refined.create : true,
+            sourceId: refined.sourceId,
+            leftoverProps: extra,
+        };
+    }
+
+    class CalendarRoot extends BaseComponent {
+        constructor() {
+            super(...arguments);
+            this.state = {
+                forPrint: false,
+            };
+            this.handleBeforePrint = () => {
+                flushSync(() => {
+                    this.setState({ forPrint: true });
+                });
+            };
+            this.handleAfterPrint = () => {
+                flushSync(() => {
+                    this.setState({ forPrint: false });
+                });
+            };
+        }
+        render() {
+            let { props } = this;
+            let { options } = props;
+            let { forPrint } = this.state;
+            let isHeightAuto = forPrint || options.height === 'auto' || options.contentHeight === 'auto';
+            let height = (!isHeightAuto && options.height != null) ? options.height : '';
+            let classNames = [
+                'fc',
+                forPrint ? 'fc-media-print' : 'fc-media-screen',
+                `fc-direction-${options.direction}`,
+                props.theme.getClass('root'),
+            ];
+            if (!getCanVGrowWithinCell()) {
+                classNames.push('fc-liquid-hack');
+            }
+            return props.children(classNames, height, isHeightAuto, forPrint);
+        }
+        componentDidMount() {
+            let { emitter } = this.props;
+            emitter.on('_beforeprint', this.handleBeforePrint);
+            emitter.on('_afterprint', this.handleAfterPrint);
+        }
+        componentWillUnmount() {
+            let { emitter } = this.props;
+            emitter.off('_beforeprint', this.handleBeforePrint);
+            emitter.off('_afterprint', this.handleAfterPrint);
+        }
+    }
+
+    // Computes a default column header formatting string if `colFormat` is not explicitly defined
+    function computeFallbackHeaderFormat(datesRepDistinctDays, dayCnt) {
+        // if more than one week row, or if there are a lot of columns with not much space,
+        // put just the day numbers will be in each cell
+        if (!datesRepDistinctDays || dayCnt > 10) {
+            return createFormatter({ weekday: 'short' }); // "Sat"
+        }
+        if (dayCnt > 1) {
+            return createFormatter({ weekday: 'short', month: 'numeric', day: 'numeric', omitCommas: true }); // "Sat 11/12"
+        }
+        return createFormatter({ weekday: 'long' }); // "Saturday"
+    }
+
+    const CLASS_NAME = 'fc-col-header-cell'; // do the cushion too? no
+    function renderInner$1(renderProps) {
+        return renderProps.text;
+    }
+
+    class ContentInjector extends BaseComponent {
+        constructor() {
+            super(...arguments);
+            this.id = guid();
+            this.queuedDomNodes = [];
+            this.currentDomNodes = [];
+            this.handleEl = (el) => {
+                const { options } = this.context;
+                const { generatorName } = this.props;
+                if (!options.customRenderingReplaces || !hasCustomRenderingHandler(generatorName, options)) {
+                    this.updateElRef(el);
+                }
+            };
+            this.updateElRef = (el) => {
+                if (this.props.elRef) {
+                    setRef(this.props.elRef, el);
+                }
+            };
+        }
+        render() {
+            const { props, context } = this;
+            const { options } = context;
+            const { customGenerator, defaultGenerator, renderProps } = props;
+            const attrs = buildElAttrs(props, [], this.handleEl);
+            let useDefault = false;
+            let innerContent;
+            let queuedDomNodes = [];
+            let currentGeneratorMeta;
+            if (customGenerator != null) {
+                const customGeneratorRes = typeof customGenerator === 'function' ?
+                    customGenerator(renderProps, y) :
+                    customGenerator;
+                if (customGeneratorRes === true) {
+                    useDefault = true;
+                }
+                else {
+                    const isObject = customGeneratorRes && typeof customGeneratorRes === 'object'; // non-null
+                    if (isObject && ('html' in customGeneratorRes)) {
+                        attrs.dangerouslySetInnerHTML = { __html: customGeneratorRes.html };
+                    }
+                    else if (isObject && ('domNodes' in customGeneratorRes)) {
+                        queuedDomNodes = Array.prototype.slice.call(customGeneratorRes.domNodes);
+                    }
+                    else if (isObject
+                        ? i$1(customGeneratorRes) // vdom node
+                        : typeof customGeneratorRes !== 'function' // primitive value (like string or number)
+                    ) {
+                        // use in vdom
+                        innerContent = customGeneratorRes;
+                    }
+                    else {
+                        // an exotic object for handleCustomRendering
+                        currentGeneratorMeta = customGeneratorRes;
+                    }
+                }
+            }
+            else {
+                useDefault = !hasCustomRenderingHandler(props.generatorName, options);
+            }
+            if (useDefault && defaultGenerator) {
+                innerContent = defaultGenerator(renderProps);
+            }
+            this.queuedDomNodes = queuedDomNodes;
+            this.currentGeneratorMeta = currentGeneratorMeta;
+            return y(props.elTag, attrs, innerContent);
+        }
+        componentDidMount() {
+            this.applyQueueudDomNodes();
+            this.triggerCustomRendering(true);
+        }
+        componentDidUpdate() {
+            this.applyQueueudDomNodes();
+            this.triggerCustomRendering(true);
+        }
+        componentWillUnmount() {
+            this.triggerCustomRendering(false); // TODO: different API for removal?
+        }
+        triggerCustomRendering(isActive) {
+            var _a;
+            const { props, context } = this;
+            const { handleCustomRendering, customRenderingMetaMap } = context.options;
+            if (handleCustomRendering) {
+                const generatorMeta = (_a = this.currentGeneratorMeta) !== null && _a !== void 0 ? _a : customRenderingMetaMap === null || customRenderingMetaMap === void 0 ? void 0 : customRenderingMetaMap[props.generatorName];
+                if (generatorMeta) {
+                    handleCustomRendering(Object.assign(Object.assign({ id: this.id, isActive, containerEl: this.base, reportNewContainerEl: this.updateElRef, // front-end framework tells us about new container els
+                        generatorMeta }, props), { elClasses: (props.elClasses || []).filter(isTruthy) }));
+                }
+            }
+        }
+        applyQueueudDomNodes() {
+            const { queuedDomNodes, currentDomNodes } = this;
+            const el = this.base;
+            if (!isArraysEqual(queuedDomNodes, currentDomNodes)) {
+                currentDomNodes.forEach(removeElement);
+                for (let newNode of queuedDomNodes) {
+                    el.appendChild(newNode);
+                }
+                this.currentDomNodes = queuedDomNodes;
+            }
+        }
+    }
+    ContentInjector.addPropsEquality({
+        elClasses: isArraysEqual,
+        elStyle: isPropsEqual,
+        elAttrs: isNonHandlerPropsEqual,
+        renderProps: isPropsEqual,
+    });
+    // Util
+    /*
+    Does UI-framework provide custom way of rendering that does not use Preact VDOM
+    AND does the calendar's options define custom rendering?
+    AKA. Should we NOT render the default content?
+    */
+    function hasCustomRenderingHandler(generatorName, options) {
+        var _a;
+        return Boolean(options.handleCustomRendering &&
+            generatorName &&
+            ((_a = options.customRenderingMetaMap) === null || _a === void 0 ? void 0 : _a[generatorName]));
+    }
+    function buildElAttrs(props, extraClassNames, elRef) {
+        const attrs = Object.assign(Object.assign({}, props.elAttrs), { ref: elRef });
+        if (props.elClasses || extraClassNames) {
+            attrs.className = (props.elClasses || [])
+                .concat(extraClassNames || [])
+                .concat(attrs.className || [])
+                .filter(Boolean)
+                .join(' ');
+        }
+        if (props.elStyle) {
+            attrs.style = props.elStyle;
+        }
+        return attrs;
+    }
+    function isTruthy(val) {
+        return Boolean(val);
+    }
+
+    const RenderId = createContext(0);
+
+    class ContentContainer extends x$1 {
+        constructor() {
+            super(...arguments);
+            this.InnerContent = InnerContentInjector.bind(undefined, this);
+            this.handleEl = (el) => {
+                this.el = el;
+                if (this.props.elRef) {
+                    setRef(this.props.elRef, el);
+                    if (el && this.didMountMisfire) {
+                        this.componentDidMount();
+                    }
+                }
+            };
+        }
+        render() {
+            const { props } = this;
+            const generatedClassNames = generateClassNames(props.classNameGenerator, props.renderProps);
+            if (props.children) {
+                const elAttrs = buildElAttrs(props, generatedClassNames, this.handleEl);
+                const children = props.children(this.InnerContent, props.renderProps, elAttrs);
+                if (props.elTag) {
+                    return y(props.elTag, elAttrs, children);
+                }
+                else {
+                    return children;
+                }
+            }
+            else {
+                return y((ContentInjector), Object.assign(Object.assign({}, props), { elRef: this.handleEl, elTag: props.elTag || 'div', elClasses: (props.elClasses || []).concat(generatedClassNames), renderId: this.context }));
+            }
+        }
+        componentDidMount() {
+            var _a, _b;
+            if (this.el) {
+                (_b = (_a = this.props).didMount) === null || _b === void 0 ? void 0 : _b.call(_a, Object.assign(Object.assign({}, this.props.renderProps), { el: this.el }));
+            }
+            else {
+                this.didMountMisfire = true;
+            }
+        }
+        componentWillUnmount() {
+            var _a, _b;
+            (_b = (_a = this.props).willUnmount) === null || _b === void 0 ? void 0 : _b.call(_a, Object.assign(Object.assign({}, this.props.renderProps), { el: this.el }));
+        }
+    }
+    ContentContainer.contextType = RenderId;
+    function InnerContentInjector(containerComponent, props) {
+        const parentProps = containerComponent.props;
+        return y((ContentInjector), Object.assign({ renderProps: parentProps.renderProps, generatorName: parentProps.generatorName, customGenerator: parentProps.customGenerator, defaultGenerator: parentProps.defaultGenerator, renderId: containerComponent.context }, props));
+    }
+    // Utils
+    function generateClassNames(classNameGenerator, renderProps) {
+        const classNames = typeof classNameGenerator === 'function' ?
+            classNameGenerator(renderProps) :
+            classNameGenerator || [];
+        return typeof classNames === 'string' ? [classNames] : classNames;
+    }
+
+    // BAD name for this class now. used in the Header
+    class TableDateCell extends BaseComponent {
+        render() {
+            let { dateEnv, options, theme, viewApi } = this.context;
+            let { props } = this;
+            let { date, dateProfile } = props;
+            let dayMeta = getDateMeta(date, props.todayRange, null, dateProfile);
+            let classNames = [CLASS_NAME].concat(getDayClassNames(dayMeta, theme));
+            let text = dateEnv.format(date, props.dayHeaderFormat);
+            // if colCnt is 1, we are already in a day-view and don't need a navlink
+            let navLinkAttrs = (!dayMeta.isDisabled && props.colCnt > 1)
+                ? buildNavLinkAttrs(this.context, date)
+                : {};
+            let publicDate = dateEnv.toDate(date);
+            // workaround for Luxon (and maybe moment) returning prior-days when start-of-day
+            // in DST gap: https://github.com/fullcalendar/fullcalendar/issues/7633
+            if (dateEnv.namedTimeZoneImpl) {
+                publicDate = addMs(publicDate, 3600000); // add an hour
+            }
+            let renderProps = Object.assign(Object.assign(Object.assign({ date: publicDate, view: viewApi }, props.extraRenderProps), { text }), dayMeta);
+            return (y(ContentContainer, { elTag: "th", elClasses: classNames, elAttrs: Object.assign({ role: 'columnheader', colSpan: props.colSpan, 'data-date': !dayMeta.isDisabled ? formatDayString(date) : undefined }, props.extraDataAttrs), renderProps: renderProps, generatorName: "dayHeaderContent", customGenerator: options.dayHeaderContent, defaultGenerator: renderInner$1, classNameGenerator: options.dayHeaderClassNames, didMount: options.dayHeaderDidMount, willUnmount: options.dayHeaderWillUnmount }, (InnerContainer) => (y("div", { className: "fc-scrollgrid-sync-inner" }, !dayMeta.isDisabled && (y(InnerContainer, { elTag: "a", elAttrs: navLinkAttrs, elClasses: [
+                    'fc-col-header-cell-cushion',
+                    props.isSticky && 'fc-sticky',
+                ] }))))));
+        }
+    }
+
+    const WEEKDAY_FORMAT = createFormatter({ weekday: 'long' });
+    class TableDowCell extends BaseComponent {
+        render() {
+            let { props } = this;
+            let { dateEnv, theme, viewApi, options } = this.context;
+            let date = addDays(new Date(259200000), props.dow); // start with Sun, 04 Jan 1970 00:00:00 GMT
+            let dateMeta = {
+                dow: props.dow,
+                isDisabled: false,
+                isFuture: false,
+                isPast: false,
+                isToday: false,
+                isOther: false,
+            };
+            let text = dateEnv.format(date, props.dayHeaderFormat);
+            let renderProps = Object.assign(Object.assign(Object.assign(Object.assign({ // TODO: make this public?
+                date }, dateMeta), { view: viewApi }), props.extraRenderProps), { text });
+            return (y(ContentContainer, { elTag: "th", elClasses: [
+                    CLASS_NAME,
+                    ...getDayClassNames(dateMeta, theme),
+                    ...(props.extraClassNames || []),
+                ], elAttrs: Object.assign({ role: 'columnheader', colSpan: props.colSpan }, props.extraDataAttrs), renderProps: renderProps, generatorName: "dayHeaderContent", customGenerator: options.dayHeaderContent, defaultGenerator: renderInner$1, classNameGenerator: options.dayHeaderClassNames, didMount: options.dayHeaderDidMount, willUnmount: options.dayHeaderWillUnmount }, (InnerContent) => (y("div", { className: "fc-scrollgrid-sync-inner" },
+                y(InnerContent, { elTag: "a", elClasses: [
+                        'fc-col-header-cell-cushion',
+                        props.isSticky && 'fc-sticky',
+                    ], elAttrs: {
+                        'aria-label': dateEnv.format(date, WEEKDAY_FORMAT),
+                    } })))));
+        }
+    }
+
+    class NowTimer extends x$1 {
+        constructor(props, context) {
+            super(props, context);
+            this.handleRefresh = () => {
+                let timing = this.computeTiming();
+                if (timing.state.nowDate.valueOf() !== this.state.nowDate.valueOf()) {
+                    this.setState(timing.state);
+                }
+                this.clearTimeout();
+                this.setTimeout(timing.waitMs);
+            };
+            this.handleVisibilityChange = () => {
+                if (!document.hidden) {
+                    this.handleRefresh();
+                }
+            };
+            this.state = this.computeTiming().state;
+        }
+        render() {
+            let { props, state } = this;
+            return props.children(state.nowDate, state.todayRange);
+        }
+        componentDidMount() {
+            this.setTimeout();
+            this.context.nowManager.addResetListener(this.handleRefresh);
+            // fired tab becomes visible after being hidden
+            document.addEventListener('visibilitychange', this.handleVisibilityChange);
+        }
+        componentDidUpdate(prevProps) {
+            if (prevProps.unit !== this.props.unit) {
+                this.clearTimeout();
+                this.setTimeout();
+            }
+        }
+        componentWillUnmount() {
+            this.clearTimeout();
+            this.context.nowManager.removeResetListener(this.handleRefresh);
+            document.removeEventListener('visibilitychange', this.handleVisibilityChange);
+        }
+        computeTiming() {
+            let { props, context } = this;
+            let unroundedNow = context.nowManager.getDateMarker();
+            let currentUnitStart = context.dateEnv.startOf(unroundedNow, props.unit);
+            let nextUnitStart = context.dateEnv.add(currentUnitStart, createDuration(1, props.unit));
+            let waitMs = nextUnitStart.valueOf() - unroundedNow.valueOf();
+            // there is a max setTimeout ms value (https://stackoverflow.com/a/3468650/96342)
+            // ensure no longer than a day
+            waitMs = Math.min(1000 * 60 * 60 * 24, waitMs);
+            return {
+                state: { nowDate: currentUnitStart, todayRange: buildDayRange(currentUnitStart) },
+                waitMs,
+            };
+        }
+        setTimeout(waitMs = this.computeTiming().waitMs) {
+            // NOTE: timeout could take longer than expected if tab sleeps,
+            // which is why we listen to 'visibilitychange'
+            this.timeoutId = setTimeout(() => {
+                // NOTE: timeout could also return *earlier* than expected, and we need to wait 2 ms more
+                // This is why use use same waitMs from computeTiming, so we don't skip an interval while
+                // .setState() is executing
+                const timing = this.computeTiming();
+                this.setState(timing.state, () => {
+                    this.setTimeout(timing.waitMs);
+                });
+            }, waitMs);
+        }
+        clearTimeout() {
+            if (this.timeoutId) {
+                clearTimeout(this.timeoutId);
+            }
+        }
+    }
+    NowTimer.contextType = ViewContextType;
+    function buildDayRange(date) {
+        let start = startOfDay(date);
+        let end = addDays(start, 1);
+        return { start, end };
+    }
+
+    class DayHeader extends BaseComponent {
+        constructor() {
+            super(...arguments);
+            this.createDayHeaderFormatter = memoize(createDayHeaderFormatter);
+        }
+        render() {
+            let { context } = this;
+            let { dates, dateProfile, datesRepDistinctDays, renderIntro } = this.props;
+            let dayHeaderFormat = this.createDayHeaderFormatter(context.options.dayHeaderFormat, datesRepDistinctDays, dates.length);
+            return (y(NowTimer, { unit: "day" }, (nowDate, todayRange) => (y("tr", { role: "row" },
+                renderIntro && renderIntro('day'),
+                dates.map((date) => (datesRepDistinctDays ? (y(TableDateCell, { key: date.toISOString(), date: date, dateProfile: dateProfile, todayRange: todayRange, colCnt: dates.length, dayHeaderFormat: dayHeaderFormat })) : (y(TableDowCell, { key: date.getUTCDay(), dow: date.getUTCDay(), dayHeaderFormat: dayHeaderFormat }))))))));
+        }
+    }
+    function createDayHeaderFormatter(explicitFormat, datesRepDistinctDays, dateCnt) {
+        return explicitFormat || computeFallbackHeaderFormat(datesRepDistinctDays, dateCnt);
+    }
+
+    class DaySeriesModel {
+        constructor(range, dateProfileGenerator) {
+            let date = range.start;
+            let { end } = range;
+            let indices = [];
+            let dates = [];
+            let dayIndex = -1;
+            while (date < end) { // loop each day from start to end
+                if (dateProfileGenerator.isHiddenDay(date)) {
+                    indices.push(dayIndex + 0.5); // mark that it's between indices
+                }
+                else {
+                    dayIndex += 1;
+                    indices.push(dayIndex);
+                    dates.push(date);
+                }
+                date = addDays(date, 1);
+            }
+            this.dates = dates;
+            this.indices = indices;
+            this.cnt = dates.length;
+        }
+        sliceRange(range) {
+            let firstIndex = this.getDateDayIndex(range.start); // inclusive first index
+            let lastIndex = this.getDateDayIndex(addDays(range.end, -1)); // inclusive last index
+            let clippedFirstIndex = Math.max(0, firstIndex);
+            let clippedLastIndex = Math.min(this.cnt - 1, lastIndex);
+            // deal with in-between indices
+            clippedFirstIndex = Math.ceil(clippedFirstIndex); // in-between starts round to next cell
+            clippedLastIndex = Math.floor(clippedLastIndex); // in-between ends round to prev cell
+            if (clippedFirstIndex <= clippedLastIndex) {
+                return {
+                    firstIndex: clippedFirstIndex,
+                    lastIndex: clippedLastIndex,
+                    isStart: firstIndex === clippedFirstIndex,
+                    isEnd: lastIndex === clippedLastIndex,
+                };
+            }
+            return null;
+        }
+        // Given a date, returns its chronolocial cell-index from the first cell of the grid.
+        // If the date lies between cells (because of hiddenDays), returns a floating-point value between offsets.
+        // If before the first offset, returns a negative number.
+        // If after the last offset, returns an offset past the last cell offset.
+        // Only works for *start* dates of cells. Will not work for exclusive end dates for cells.
+        getDateDayIndex(date) {
+            let { indices } = this;
+            let dayOffset = Math.floor(diffDays(this.dates[0], date));
+            if (dayOffset < 0) {
+                return indices[0] - 1;
+            }
+            if (dayOffset >= indices.length) {
+                return indices[indices.length - 1] + 1;
+            }
+            return indices[dayOffset];
+        }
+    }
+
+    class DayTableModel {
+        constructor(daySeries, breakOnWeeks) {
+            let { dates } = daySeries;
+            let daysPerRow;
+            let firstDay;
+            let rowCnt;
+            if (breakOnWeeks) {
+                // count columns until the day-of-week repeats
+                firstDay = dates[0].getUTCDay();
+                for (daysPerRow = 1; daysPerRow < dates.length; daysPerRow += 1) {
+                    if (dates[daysPerRow].getUTCDay() === firstDay) {
+                        break;
+                    }
+                }
+                rowCnt = Math.ceil(dates.length / daysPerRow);
+            }
+            else {
+                rowCnt = 1;
+                daysPerRow = dates.length;
+            }
+            this.rowCnt = rowCnt;
+            this.colCnt = daysPerRow;
+            this.daySeries = daySeries;
+            this.cells = this.buildCells();
+            this.headerDates = this.buildHeaderDates();
+        }
+        buildCells() {
+            let rows = [];
+            for (let row = 0; row < this.rowCnt; row += 1) {
+                let cells = [];
+                for (let col = 0; col < this.colCnt; col += 1) {
+                    cells.push(this.buildCell(row, col));
+                }
+                rows.push(cells);
+            }
+            return rows;
+        }
+        buildCell(row, col) {
+            let date = this.daySeries.dates[row * this.colCnt + col];
+            return {
+                key: date.toISOString(),
+                date,
+            };
+        }
+        buildHeaderDates() {
+            let dates = [];
+            for (let col = 0; col < this.colCnt; col += 1) {
+                dates.push(this.cells[0][col].date);
+            }
+            return dates;
+        }
+        sliceRange(range) {
+            let { colCnt } = this;
+            let seriesSeg = this.daySeries.sliceRange(range);
+            let segs = [];
+            if (seriesSeg) {
+                let { firstIndex, lastIndex } = seriesSeg;
+                let index = firstIndex;
+                while (index <= lastIndex) {
+                    let row = Math.floor(index / colCnt);
+                    let nextIndex = Math.min((row + 1) * colCnt, lastIndex + 1);
+                    segs.push({
+                        row,
+                        firstCol: index % colCnt,
+                        lastCol: (nextIndex - 1) % colCnt,
+                        isStart: seriesSeg.isStart && index === firstIndex,
+                        isEnd: seriesSeg.isEnd && (nextIndex - 1) === lastIndex,
+                    });
+                    index = nextIndex;
+                }
+            }
+            return segs;
+        }
+    }
+
+    class Slicer {
+        constructor() {
+            this.sliceBusinessHours = memoize(this._sliceBusinessHours);
+            this.sliceDateSelection = memoize(this._sliceDateSpan);
+            this.sliceEventStore = memoize(this._sliceEventStore);
+            this.sliceEventDrag = memoize(this._sliceInteraction);
+            this.sliceEventResize = memoize(this._sliceInteraction);
+            this.forceDayIfListItem = false; // hack
+        }
+        sliceProps(props, dateProfile, nextDayThreshold, context, ...extraArgs) {
+            let { eventUiBases } = props;
+            let eventSegs = this.sliceEventStore(props.eventStore, eventUiBases, dateProfile, nextDayThreshold, ...extraArgs);
+            return {
+                dateSelectionSegs: this.sliceDateSelection(props.dateSelection, dateProfile, nextDayThreshold, eventUiBases, context, ...extraArgs),
+                businessHourSegs: this.sliceBusinessHours(props.businessHours, dateProfile, nextDayThreshold, context, ...extraArgs),
+                fgEventSegs: eventSegs.fg,
+                bgEventSegs: eventSegs.bg,
+                eventDrag: this.sliceEventDrag(props.eventDrag, eventUiBases, dateProfile, nextDayThreshold, ...extraArgs),
+                eventResize: this.sliceEventResize(props.eventResize, eventUiBases, dateProfile, nextDayThreshold, ...extraArgs),
+                eventSelection: props.eventSelection,
+            }; // TODO: give interactionSegs?
+        }
+        sliceNowDate(// does not memoize
+        date, dateProfile, nextDayThreshold, context, ...extraArgs) {
+            return this._sliceDateSpan({ range: { start: date, end: addMs(date, 1) }, allDay: false }, // add 1 ms, protect against null range
+            dateProfile, nextDayThreshold, {}, context, ...extraArgs);
+        }
+        _sliceBusinessHours(businessHours, dateProfile, nextDayThreshold, context, ...extraArgs) {
+            if (!businessHours) {
+                return [];
+            }
+            return this._sliceEventStore(expandRecurring(businessHours, computeActiveRange(dateProfile, Boolean(nextDayThreshold)), context), {}, dateProfile, nextDayThreshold, ...extraArgs).bg;
+        }
+        _sliceEventStore(eventStore, eventUiBases, dateProfile, nextDayThreshold, ...extraArgs) {
+            if (eventStore) {
+                let rangeRes = sliceEventStore(eventStore, eventUiBases, computeActiveRange(dateProfile, Boolean(nextDayThreshold)), nextDayThreshold);
+                return {
+                    bg: this.sliceEventRanges(rangeRes.bg, extraArgs),
+                    fg: this.sliceEventRanges(rangeRes.fg, extraArgs),
+                };
+            }
+            return { bg: [], fg: [] };
+        }
+        _sliceInteraction(interaction, eventUiBases, dateProfile, nextDayThreshold, ...extraArgs) {
+            if (!interaction) {
+                return null;
+            }
+            let rangeRes = sliceEventStore(interaction.mutatedEvents, eventUiBases, computeActiveRange(dateProfile, Boolean(nextDayThreshold)), nextDayThreshold);
+            return {
+                segs: this.sliceEventRanges(rangeRes.fg, extraArgs),
+                affectedInstances: interaction.affectedEvents.instances,
+                isEvent: interaction.isEvent,
+            };
+        }
+        _sliceDateSpan(dateSpan, dateProfile, nextDayThreshold, eventUiBases, context, ...extraArgs) {
+            if (!dateSpan) {
+                return [];
+            }
+            let activeRange = computeActiveRange(dateProfile, Boolean(nextDayThreshold));
+            let activeDateSpanRange = intersectRanges(dateSpan.range, activeRange);
+            if (activeDateSpanRange) {
+                dateSpan = Object.assign(Object.assign({}, dateSpan), { range: activeDateSpanRange });
+                let eventRange = fabricateEventRange(dateSpan, eventUiBases, context);
+                let segs = this.sliceRange(dateSpan.range, ...extraArgs);
+                for (let seg of segs) {
+                    seg.eventRange = eventRange;
+                }
+                return segs;
+            }
+            return [];
+        }
+        /*
+        "complete" seg means it has component and eventRange
+        */
+        sliceEventRanges(eventRanges, extraArgs) {
+            let segs = [];
+            for (let eventRange of eventRanges) {
+                segs.push(...this.sliceEventRange(eventRange, extraArgs));
+            }
+            return segs;
+        }
+        /*
+        "complete" seg means it has component and eventRange
+        */
+        sliceEventRange(eventRange, extraArgs) {
+            let dateRange = eventRange.range;
+            // hack to make multi-day events that are being force-displayed as list-items to take up only one day
+            if (this.forceDayIfListItem && eventRange.ui.display === 'list-item') {
+                dateRange = {
+                    start: dateRange.start,
+                    end: addDays(dateRange.start, 1),
+                };
+            }
+            let segs = this.sliceRange(dateRange, ...extraArgs);
+            for (let seg of segs) {
+                seg.eventRange = eventRange;
+                seg.isStart = eventRange.isStart && seg.isStart;
+                seg.isEnd = eventRange.isEnd && seg.isEnd;
+            }
+            return segs;
+        }
+    }
+    /*
+    for incorporating slotMinTime/slotMaxTime if appropriate
+    TODO: should be part of DateProfile!
+    TimelineDateProfile already does this btw
+    */
+    function computeActiveRange(dateProfile, isComponentAllDay) {
+        let range = dateProfile.activeRange;
+        if (isComponentAllDay) {
+            return range;
+        }
+        return {
+            start: addMs(range.start, dateProfile.slotMinTime.milliseconds),
+            end: addMs(range.end, dateProfile.slotMaxTime.milliseconds - 864e5), // 864e5 = ms in a day
+        };
+    }
+
+    function reduceEventStore(eventStore, action, eventSources, dateProfile, context) {
+        switch (action.type) {
+            case 'RECEIVE_EVENTS': // raw
+                return receiveRawEvents(eventStore, eventSources[action.sourceId], action.fetchId, action.fetchRange, action.rawEvents, context);
+            case 'RESET_RAW_EVENTS':
+                return resetRawEvents(eventStore, eventSources[action.sourceId], action.rawEvents, dateProfile.activeRange, context);
+            case 'ADD_EVENTS': // already parsed, but not expanded
+                return addEvent(eventStore, action.eventStore, // new ones
+                dateProfile ? dateProfile.activeRange : null, context);
+            case 'RESET_EVENTS':
+                return action.eventStore;
+            case 'MERGE_EVENTS': // already parsed and expanded
+                return mergeEventStores(eventStore, action.eventStore);
+            case 'PREV': // TODO: how do we track all actions that affect dateProfile :(
+            case 'NEXT':
+            case 'CHANGE_DATE':
+            case 'CHANGE_VIEW_TYPE':
+                if (dateProfile) {
+                    return expandRecurring(eventStore, dateProfile.activeRange, context);
+                }
+                return eventStore;
+            case 'REMOVE_EVENTS':
+                return excludeSubEventStore(eventStore, action.eventStore);
+            case 'REMOVE_EVENT_SOURCE':
+                return excludeEventsBySourceId(eventStore, action.sourceId);
+            case 'REMOVE_ALL_EVENT_SOURCES':
+                return filterEventStoreDefs(eventStore, (eventDef) => (!eventDef.sourceId // only keep events with no source id
+                ));
+            case 'REMOVE_ALL_EVENTS':
+                return createEmptyEventStore();
+            default:
+                return eventStore;
+        }
+    }
+    function receiveRawEvents(eventStore, eventSource, fetchId, fetchRange, rawEvents, context) {
+        if (eventSource && // not already removed
+            fetchId === eventSource.latestFetchId // TODO: wish this logic was always in event-sources
+        ) {
+            let subset = parseEvents(transformRawEvents(rawEvents, eventSource, context), eventSource, context);
+            if (fetchRange) {
+                subset = expandRecurring(subset, fetchRange, context);
+            }
+            return mergeEventStores(excludeEventsBySourceId(eventStore, eventSource.sourceId), subset);
+        }
+        return eventStore;
+    }
+    function resetRawEvents(existingEventStore, eventSource, rawEvents, activeRange, context) {
+        const { defIdMap, instanceIdMap } = buildPublicIdMaps(existingEventStore);
+        let newEventStore = parseEvents(transformRawEvents(rawEvents, eventSource, context), eventSource, context, false, defIdMap, instanceIdMap);
+        return expandRecurring(newEventStore, activeRange, context);
+    }
+    function transformRawEvents(rawEvents, eventSource, context) {
+        let calEachTransform = context.options.eventDataTransform;
+        let sourceEachTransform = eventSource ? eventSource.eventDataTransform : null;
+        if (sourceEachTransform) {
+            rawEvents = transformEachRawEvent(rawEvents, sourceEachTransform);
+        }
+        if (calEachTransform) {
+            rawEvents = transformEachRawEvent(rawEvents, calEachTransform);
+        }
+        return rawEvents;
+    }
+    function transformEachRawEvent(rawEvents, func) {
+        let refinedEvents;
+        if (!func) {
+            refinedEvents = rawEvents;
+        }
+        else {
+            refinedEvents = [];
+            for (let rawEvent of rawEvents) {
+                let refinedEvent = func(rawEvent);
+                if (refinedEvent) {
+                    refinedEvents.push(refinedEvent);
+                }
+                else if (refinedEvent == null) {
+                    refinedEvents.push(rawEvent);
+                } // if a different falsy value, do nothing
+            }
+        }
+        return refinedEvents;
+    }
+    function addEvent(eventStore, subset, expandRange, context) {
+        if (expandRange) {
+            subset = expandRecurring(subset, expandRange, context);
+        }
+        return mergeEventStores(eventStore, subset);
+    }
+    function rezoneEventStoreDates(eventStore, oldDateEnv, newDateEnv) {
+        let { defs } = eventStore;
+        let instances = mapHash(eventStore.instances, (instance) => {
+            let def = defs[instance.defId];
+            if (def.allDay) {
+                return instance; // isn't dependent on timezone
+            }
+            return Object.assign(Object.assign({}, instance), { range: {
+                    start: newDateEnv.createMarker(oldDateEnv.toDate(instance.range.start, instance.forcedStartTzo)),
+                    end: newDateEnv.createMarker(oldDateEnv.toDate(instance.range.end, instance.forcedEndTzo)),
+                }, forcedStartTzo: newDateEnv.canComputeOffset ? null : instance.forcedStartTzo, forcedEndTzo: newDateEnv.canComputeOffset ? null : instance.forcedEndTzo });
+        });
+        return { defs, instances };
+    }
+    function excludeEventsBySourceId(eventStore, sourceId) {
+        return filterEventStoreDefs(eventStore, (eventDef) => eventDef.sourceId !== sourceId);
+    }
+    // QUESTION: why not just return instances? do a general object-property-exclusion util
+    function excludeInstances(eventStore, removals) {
+        return {
+            defs: eventStore.defs,
+            instances: filterHash(eventStore.instances, (instance) => !removals[instance.instanceId]),
+        };
+    }
+    function buildPublicIdMaps(eventStore) {
+        const { defs, instances } = eventStore;
+        const defIdMap = {};
+        const instanceIdMap = {};
+        for (let defId in defs) {
+            const def = defs[defId];
+            const { publicId } = def;
+            if (publicId) {
+                defIdMap[publicId] = defId;
+            }
+        }
+        for (let instanceId in instances) {
+            const instance = instances[instanceId];
+            const def = defs[instance.defId];
+            const { publicId } = def;
+            if (publicId) {
+                instanceIdMap[publicId] = instanceId;
+            }
+        }
+        return { defIdMap, instanceIdMap };
+    }
+
+    // high-level segmenting-aware tester functions
+    // ------------------------------------------------------------------------------------------------------------------------
+    function isInteractionValid(interaction, dateProfile, context) {
+        let { instances } = interaction.mutatedEvents;
+        for (let instanceId in instances) {
+            if (!rangeContainsRange(dateProfile.validRange, instances[instanceId].range)) {
+                return false;
+            }
+        }
+        return isNewPropsValid({ eventDrag: interaction }, context); // HACK: the eventDrag props is used for ALL interactions
+    }
+    function isDateSelectionValid(dateSelection, dateProfile, context) {
+        if (!rangeContainsRange(dateProfile.validRange, dateSelection.range)) {
+            return false;
+        }
+        return isNewPropsValid({ dateSelection }, context);
+    }
+    function isNewPropsValid(newProps, context) {
+        let calendarState = context.getCurrentData();
+        let props = Object.assign({ businessHours: calendarState.businessHours, dateSelection: '', eventStore: calendarState.eventStore, eventUiBases: calendarState.eventUiBases, eventSelection: '', eventDrag: null, eventResize: null }, newProps);
+        return (context.pluginHooks.isPropsValid || isPropsValid)(props, context);
+    }
+    function isPropsValid(state, context, dateSpanMeta = {}, filterConfig) {
+        if (state.eventDrag && !isInteractionPropsValid(state, context, dateSpanMeta, filterConfig)) {
+            return false;
+        }
+        if (state.dateSelection && !isDateSelectionPropsValid(state, context, dateSpanMeta, filterConfig)) {
+            return false;
+        }
+        return true;
+    }
+    // Moving Event Validation
+    // ------------------------------------------------------------------------------------------------------------------------
+    function isInteractionPropsValid(state, context, dateSpanMeta, filterConfig) {
+        let currentState = context.getCurrentData();
+        let interaction = state.eventDrag; // HACK: the eventDrag props is used for ALL interactions
+        let subjectEventStore = interaction.mutatedEvents;
+        let subjectDefs = subjectEventStore.defs;
+        let subjectInstances = subjectEventStore.instances;
+        let subjectConfigs = compileEventUis(subjectDefs, interaction.isEvent ?
+            state.eventUiBases :
+            { '': currentState.selectionConfig });
+        if (filterConfig) {
+            subjectConfigs = mapHash(subjectConfigs, filterConfig);
+        }
+        // exclude the subject events. TODO: exclude defs too?
+        let otherEventStore = excludeInstances(state.eventStore, interaction.affectedEvents.instances);
+        let otherDefs = otherEventStore.defs;
+        let otherInstances = otherEventStore.instances;
+        let otherConfigs = compileEventUis(otherDefs, state.eventUiBases);
+        for (let subjectInstanceId in subjectInstances) {
+            let subjectInstance = subjectInstances[subjectInstanceId];
+            let subjectRange = subjectInstance.range;
+            let subjectConfig = subjectConfigs[subjectInstance.defId];
+            let subjectDef = subjectDefs[subjectInstance.defId];
+            // constraint
+            if (!allConstraintsPass(subjectConfig.constraints, subjectRange, otherEventStore, state.businessHours, context)) {
+                return false;
+            }
+            // overlap
+            let { eventOverlap } = context.options;
+            let eventOverlapFunc = typeof eventOverlap === 'function' ? eventOverlap : null;
+            for (let otherInstanceId in otherInstances) {
+                let otherInstance = otherInstances[otherInstanceId];
+                // intersect! evaluate
+                if (rangesIntersect(subjectRange, otherInstance.range)) {
+                    let otherOverlap = otherConfigs[otherInstance.defId].overlap;
+                    // consider the other event's overlap. only do this if the subject event is a "real" event
+                    if (otherOverlap === false && interaction.isEvent) {
+                        return false;
+                    }
+                    if (subjectConfig.overlap === false) {
+                        return false;
+                    }
+                    if (eventOverlapFunc && !eventOverlapFunc(new EventImpl(context, otherDefs[otherInstance.defId], otherInstance), // still event
+                    new EventImpl(context, subjectDef, subjectInstance))) {
+                        return false;
+                    }
+                }
+            }
+            // allow (a function)
+            let calendarEventStore = currentState.eventStore; // need global-to-calendar, not local to component (splittable)state
+            for (let subjectAllow of subjectConfig.allows) {
+                let subjectDateSpan = Object.assign(Object.assign({}, dateSpanMeta), { range: subjectInstance.range, allDay: subjectDef.allDay });
+                let origDef = calendarEventStore.defs[subjectDef.defId];
+                let origInstance = calendarEventStore.instances[subjectInstanceId];
+                let eventApi;
+                if (origDef) { // was previously in the calendar
+                    eventApi = new EventImpl(context, origDef, origInstance);
+                }
+                else { // was an external event
+                    eventApi = new EventImpl(context, subjectDef); // no instance, because had no dates
+                }
+                if (!subjectAllow(buildDateSpanApiWithContext(subjectDateSpan, context), eventApi)) {
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+    // Date Selection Validation
+    // ------------------------------------------------------------------------------------------------------------------------
+    function isDateSelectionPropsValid(state, context, dateSpanMeta, filterConfig) {
+        let relevantEventStore = state.eventStore;
+        let relevantDefs = relevantEventStore.defs;
+        let relevantInstances = relevantEventStore.instances;
+        let selection = state.dateSelection;
+        let selectionRange = selection.range;
+        let { selectionConfig } = context.getCurrentData();
+        if (filterConfig) {
+            selectionConfig = filterConfig(selectionConfig);
+        }
+        // constraint
+        if (!allConstraintsPass(selectionConfig.constraints, selectionRange, relevantEventStore, state.businessHours, context)) {
+            return false;
+        }
+        // overlap
+        let { selectOverlap } = context.options;
+        let selectOverlapFunc = typeof selectOverlap === 'function' ? selectOverlap : null;
+        for (let relevantInstanceId in relevantInstances) {
+            let relevantInstance = relevantInstances[relevantInstanceId];
+            // intersect! evaluate
+            if (rangesIntersect(selectionRange, relevantInstance.range)) {
+                if (selectionConfig.overlap === false) {
+                    return false;
+                }
+                if (selectOverlapFunc && !selectOverlapFunc(new EventImpl(context, relevantDefs[relevantInstance.defId], relevantInstance), null)) {
+                    return false;
+                }
+            }
+        }
+        // allow (a function)
+        for (let selectionAllow of selectionConfig.allows) {
+            let fullDateSpan = Object.assign(Object.assign({}, dateSpanMeta), selection);
+            if (!selectionAllow(buildDateSpanApiWithContext(fullDateSpan, context), null)) {
+                return false;
+            }
+        }
+        return true;
+    }
+    // Constraint Utils
+    // ------------------------------------------------------------------------------------------------------------------------
+    function allConstraintsPass(constraints, subjectRange, otherEventStore, businessHoursUnexpanded, context) {
+        for (let constraint of constraints) {
+            if (!anyRangesContainRange(constraintToRanges(constraint, subjectRange, otherEventStore, businessHoursUnexpanded, context), subjectRange)) {
+                return false;
+            }
+        }
+        return true;
+    }
+    function constraintToRanges(constraint, subjectRange, // for expanding a recurring constraint, or expanding business hours
+    otherEventStore, // for if constraint is an even group ID
+    businessHoursUnexpanded, // for if constraint is 'businessHours'
+    context) {
+        if (constraint === 'businessHours') {
+            return eventStoreToRanges(expandRecurring(businessHoursUnexpanded, subjectRange, context));
+        }
+        if (typeof constraint === 'string') { // an group ID
+            return eventStoreToRanges(filterEventStoreDefs(otherEventStore, (eventDef) => eventDef.groupId === constraint));
+        }
+        if (typeof constraint === 'object' && constraint) { // non-null object
+            return eventStoreToRanges(expandRecurring(constraint, subjectRange, context));
+        }
+        return []; // if it's false
+    }
+    // TODO: move to event-store file?
+    function eventStoreToRanges(eventStore) {
+        let { instances } = eventStore;
+        let ranges = [];
+        for (let instanceId in instances) {
+            ranges.push(instances[instanceId].range);
+        }
+        return ranges;
+    }
+    // TODO: move to geom file?
+    function anyRangesContainRange(outerRanges, innerRange) {
+        for (let outerRange of outerRanges) {
+            if (rangeContainsRange(outerRange, innerRange)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    class JsonRequestError extends Error {
+        constructor(message, response) {
+            super(message);
+            this.response = response;
+        }
+    }
+    function requestJson(method, url, params) {
+        method = method.toUpperCase();
+        const fetchOptions = {
+            method,
+        };
+        if (method === 'GET') {
+            url += (url.indexOf('?') === -1 ? '?' : '&') +
+                new URLSearchParams(params);
+        }
+        else {
+            fetchOptions.body = new URLSearchParams(params);
+            fetchOptions.headers = {
+                'Content-Type': 'application/x-www-form-urlencoded',
+            };
+        }
+        return fetch(url, fetchOptions).then((fetchRes) => {
+            if (fetchRes.ok) {
+                return fetchRes.json().then((parsedResponse) => {
+                    return [parsedResponse, fetchRes];
+                }, () => {
+                    throw new JsonRequestError('Failure parsing JSON', fetchRes);
+                });
+            }
+            else {
+                throw new JsonRequestError('Request failed', fetchRes);
+            }
+        });
+    }
+
+    class DelayedRunner {
+        constructor(drainedOption) {
+            this.drainedOption = drainedOption;
+            this.isRunning = false;
+            this.isDirty = false;
+            this.pauseDepths = {};
+            this.timeoutId = 0;
+        }
+        request(delay) {
+            this.isDirty = true;
+            if (!this.isPaused()) {
+                this.clearTimeout();
+                if (delay == null) {
+                    this.tryDrain();
+                }
+                else {
+                    this.timeoutId = setTimeout(// NOT OPTIMAL! TODO: look at debounce
+                    this.tryDrain.bind(this), delay);
+                }
+            }
+        }
+        pause(scope = '') {
+            let { pauseDepths } = this;
+            pauseDepths[scope] = (pauseDepths[scope] || 0) + 1;
+            this.clearTimeout();
+        }
+        resume(scope = '', force) {
+            let { pauseDepths } = this;
+            if (scope in pauseDepths) {
+                if (force) {
+                    delete pauseDepths[scope];
+                }
+                else {
+                    pauseDepths[scope] -= 1;
+                    let depth = pauseDepths[scope];
+                    if (depth <= 0) {
+                        delete pauseDepths[scope];
+                    }
+                }
+                this.tryDrain();
+            }
+        }
+        isPaused() {
+            return Object.keys(this.pauseDepths).length;
+        }
+        tryDrain() {
+            if (!this.isRunning && !this.isPaused()) {
+                this.isRunning = true;
+                while (this.isDirty) {
+                    this.isDirty = false;
+                    this.drained(); // might set isDirty to true again
+                }
+                this.isRunning = false;
+            }
+        }
+        clear() {
+            this.clearTimeout();
+            this.isDirty = false;
+            this.pauseDepths = {};
+        }
+        clearTimeout() {
+            if (this.timeoutId) {
+                clearTimeout(this.timeoutId);
+                this.timeoutId = 0;
+            }
+        }
+        drained() {
+            if (this.drainedOption) {
+                this.drainedOption();
+            }
+        }
+    }
+
+    const VISIBLE_HIDDEN_RE = /^(visible|hidden)$/;
+    class Scroller extends BaseComponent {
+        constructor() {
+            super(...arguments);
+            this.handleEl = (el) => {
+                this.el = el;
+                setRef(this.props.elRef, el);
+            };
+        }
+        render() {
+            let { props } = this;
+            let { liquid, liquidIsAbsolute } = props;
+            let isAbsolute = liquid && liquidIsAbsolute;
+            let className = ['fc-scroller'];
+            if (liquid) {
+                if (liquidIsAbsolute) {
+                    className.push('fc-scroller-liquid-absolute');
+                }
+                else {
+                    className.push('fc-scroller-liquid');
+                }
+            }
+            return (y("div", { ref: this.handleEl, className: className.join(' '), style: {
+                    overflowX: props.overflowX,
+                    overflowY: props.overflowY,
+                    left: (isAbsolute && -(props.overcomeLeft || 0)) || '',
+                    right: (isAbsolute && -(props.overcomeRight || 0)) || '',
+                    bottom: (isAbsolute && -(props.overcomeBottom || 0)) || '',
+                    marginLeft: (!isAbsolute && -(props.overcomeLeft || 0)) || '',
+                    marginRight: (!isAbsolute && -(props.overcomeRight || 0)) || '',
+                    marginBottom: (!isAbsolute && -(props.overcomeBottom || 0)) || '',
+                    maxHeight: props.maxHeight || '',
+                } }, props.children));
+        }
+        needsXScrolling() {
+            if (VISIBLE_HIDDEN_RE.test(this.props.overflowX)) {
+                return false;
+            }
+            // testing scrollWidth>clientWidth is unreliable cross-browser when pixel heights aren't integers.
+            // much more reliable to see if children are taller than the scroller, even tho doesn't account for
+            // inner-child margins and absolute positioning
+            let { el } = this;
+            let realClientWidth = this.el.getBoundingClientRect().width - this.getYScrollbarWidth();
+            let { children } = el;
+            for (let i = 0; i < children.length; i += 1) {
+                let childEl = children[i];
+                if (childEl.getBoundingClientRect().width > realClientWidth) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        needsYScrolling() {
+            if (VISIBLE_HIDDEN_RE.test(this.props.overflowY)) {
+                return false;
+            }
+            // testing scrollHeight>clientHeight is unreliable cross-browser when pixel heights aren't integers.
+            // much more reliable to see if children are taller than the scroller, even tho doesn't account for
+            // inner-child margins and absolute positioning
+            let { el } = this;
+            let realClientHeight = this.el.getBoundingClientRect().height - this.getXScrollbarWidth();
+            let { children } = el;
+            for (let i = 0; i < children.length; i += 1) {
+                let childEl = children[i];
+                if (childEl.getBoundingClientRect().height > realClientHeight) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        getXScrollbarWidth() {
+            if (VISIBLE_HIDDEN_RE.test(this.props.overflowX)) {
+                return 0;
+            }
+            return this.el.offsetHeight - this.el.clientHeight; // only works because we guarantee no borders. TODO: add to CSS with important?
+        }
+        getYScrollbarWidth() {
+            if (VISIBLE_HIDDEN_RE.test(this.props.overflowY)) {
+                return 0;
+            }
+            return this.el.offsetWidth - this.el.clientWidth; // only works because we guarantee no borders. TODO: add to CSS with important?
+        }
+    }
+
+    /*
+    TODO: somehow infer OtherArgs from masterCallback?
+    TODO: infer RefType from masterCallback if provided
+    */
+    class RefMap {
+        constructor(masterCallback) {
+            this.masterCallback = masterCallback;
+            this.currentMap = {};
+            this.depths = {};
+            this.callbackMap = {};
+            this.handleValue = (val, key) => {
+                let { depths, currentMap } = this;
+                let removed = false;
+                let added = false;
+                if (val !== null) {
+                    // for bug... ACTUALLY: can probably do away with this now that callers don't share numeric indices anymore
+                    removed = (key in currentMap);
+                    currentMap[key] = val;
+                    depths[key] = (depths[key] || 0) + 1;
+                    added = true;
+                }
+                else {
+                    depths[key] -= 1;
+                    if (!depths[key]) {
+                        delete currentMap[key];
+                        delete this.callbackMap[key];
+                        removed = true;
+                    }
+                }
+                if (this.masterCallback) {
+                    if (removed) {
+                        this.masterCallback(null, String(key));
+                    }
+                    if (added) {
+                        this.masterCallback(val, String(key));
+                    }
+                }
+            };
+        }
+        createRef(key) {
+            let refCallback = this.callbackMap[key];
+            if (!refCallback) {
+                refCallback = this.callbackMap[key] = (val) => {
+                    this.handleValue(val, String(key));
+                };
+            }
+            return refCallback;
+        }
+        // TODO: check callers that don't care about order. should use getAll instead
+        // NOTE: this method has become less valuable now that we are encouraged to map order by some other index
+        // TODO: provide ONE array-export function, buildArray, which fails on non-numeric indexes. caller can manipulate and "collect"
+        collect(startIndex, endIndex, step) {
+            return collectFromHash(this.currentMap, startIndex, endIndex, step);
+        }
+        getAll() {
+            return hashValuesToArray(this.currentMap);
+        }
+    }
+
+    function computeShrinkWidth(chunkEls) {
+        let shrinkCells = findElements(chunkEls, '.fc-scrollgrid-shrink');
+        let largestWidth = 0;
+        for (let shrinkCell of shrinkCells) {
+            largestWidth = Math.max(largestWidth, computeSmallestCellWidth(shrinkCell));
+        }
+        return Math.ceil(largestWidth); // <table> elements work best with integers. round up to ensure contents fits
+    }
+    function getSectionHasLiquidHeight(props, sectionConfig) {
+        return props.liquid && sectionConfig.liquid; // does the section do liquid-height? (need to have whole scrollgrid liquid-height as well)
+    }
+    function getAllowYScrolling(props, sectionConfig) {
+        return sectionConfig.maxHeight != null || // if its possible for the height to max out, we might need scrollbars
+            getSectionHasLiquidHeight(props, sectionConfig); // if the section is liquid height, it might condense enough to require scrollbars
+    }
+    // TODO: ONLY use `arg`. force out internal function to use same API
+    function renderChunkContent(sectionConfig, chunkConfig, arg, isHeader) {
+        let { expandRows } = arg;
+        let content = typeof chunkConfig.content === 'function' ?
+            chunkConfig.content(arg) :
+            y('table', {
+                role: 'presentation',
+                className: [
+                    chunkConfig.tableClassName,
+                    sectionConfig.syncRowHeights ? 'fc-scrollgrid-sync-table' : '',
+                ].join(' '),
+                style: {
+                    minWidth: arg.tableMinWidth,
+                    width: arg.clientWidth,
+                    height: expandRows ? arg.clientHeight : '', // css `height` on a <table> serves as a min-height
+                },
+            }, arg.tableColGroupNode, y(isHeader ? 'thead' : 'tbody', {
+                role: 'presentation',
+            }, typeof chunkConfig.rowContent === 'function'
+                ? chunkConfig.rowContent(arg)
+                : chunkConfig.rowContent));
+        return content;
+    }
+    function isColPropsEqual(cols0, cols1) {
+        return isArraysEqual(cols0, cols1, isPropsEqual);
+    }
+    function renderMicroColGroup(cols, shrinkWidth) {
+        let colNodes = [];
+        /*
+        for ColProps with spans, it would have been great to make a single <col span="">
+        HOWEVER, Chrome was getting messing up distributing the width to <td>/<th> elements with colspans.
+        SOLUTION: making individual <col> elements makes Chrome behave.
+        */
+        for (let colProps of cols) {
+            let span = colProps.span || 1;
+            for (let i = 0; i < span; i += 1) {
+                colNodes.push(y("col", { style: {
+                        width: colProps.width === 'shrink' ? sanitizeShrinkWidth(shrinkWidth) : (colProps.width || ''),
+                        minWidth: colProps.minWidth || '',
+                    } }));
+            }
+        }
+        return y('colgroup', {}, ...colNodes);
+    }
+    function sanitizeShrinkWidth(shrinkWidth) {
+        /* why 4? if we do 0, it will kill any border, which are needed for computeSmallestCellWidth
+        4 accounts for 2 2-pixel borders. TODO: better solution? */
+        return shrinkWidth == null ? 4 : shrinkWidth;
+    }
+    function hasShrinkWidth(cols) {
+        for (let col of cols) {
+            if (col.width === 'shrink') {
+                return true;
+            }
+        }
+        return false;
+    }
+    function getScrollGridClassNames(liquid, context) {
+        let classNames = [
+            'fc-scrollgrid',
+            context.theme.getClass('table'),
+        ];
+        if (liquid) {
+            classNames.push('fc-scrollgrid-liquid');
+        }
+        return classNames;
+    }
+    function getSectionClassNames(sectionConfig, wholeTableVGrow) {
+        let classNames = [
+            'fc-scrollgrid-section',
+            `fc-scrollgrid-section-${sectionConfig.type}`,
+            sectionConfig.className, // used?
+        ];
+        if (wholeTableVGrow && sectionConfig.liquid && sectionConfig.maxHeight == null) {
+            classNames.push('fc-scrollgrid-section-liquid');
+        }
+        if (sectionConfig.isSticky) {
+            classNames.push('fc-scrollgrid-section-sticky');
+        }
+        return classNames;
+    }
+    function renderScrollShim(arg) {
+        return (y("div", { className: "fc-scrollgrid-sticky-shim", style: {
+                width: arg.clientWidth,
+                minWidth: arg.tableMinWidth,
+            } }));
+    }
+    function getStickyHeaderDates(options) {
+        let { stickyHeaderDates } = options;
+        if (stickyHeaderDates == null || stickyHeaderDates === 'auto') {
+            stickyHeaderDates = options.height === 'auto' || options.viewHeight === 'auto';
+        }
+        return stickyHeaderDates;
+    }
+    function getStickyFooterScrollbar(options) {
+        let { stickyFooterScrollbar } = options;
+        if (stickyFooterScrollbar == null || stickyFooterScrollbar === 'auto') {
+            stickyFooterScrollbar = options.height === 'auto' || options.viewHeight === 'auto';
+        }
+        return stickyFooterScrollbar;
+    }
+
+    class SimpleScrollGrid extends BaseComponent {
+        constructor() {
+            super(...arguments);
+            this.processCols = memoize((a) => a, isColPropsEqual); // so we get same `cols` props every time
+            // yucky to memoize VNodes, but much more efficient for consumers
+            this.renderMicroColGroup = memoize(renderMicroColGroup);
+            this.scrollerRefs = new RefMap();
+            this.scrollerElRefs = new RefMap(this._handleScrollerEl.bind(this));
+            this.state = {
+                shrinkWidth: null,
+                forceYScrollbars: false,
+                scrollerClientWidths: {},
+                scrollerClientHeights: {},
+            };
+            // TODO: can do a really simple print-view. dont need to join rows
+            this.handleSizing = () => {
+                this.safeSetState(Object.assign({ shrinkWidth: this.computeShrinkWidth() }, this.computeScrollerDims()));
+            };
+        }
+        render() {
+            let { props, state, context } = this;
+            let sectionConfigs = props.sections || [];
+            let cols = this.processCols(props.cols);
+            let microColGroupNode = this.renderMicroColGroup(cols, state.shrinkWidth);
+            let classNames = getScrollGridClassNames(props.liquid, context);
+            if (props.collapsibleWidth) {
+                classNames.push('fc-scrollgrid-collapsible');
+            }
+            // TODO: make DRY
+            let configCnt = sectionConfigs.length;
+            let configI = 0;
+            let currentConfig;
+            let headSectionNodes = [];
+            let bodySectionNodes = [];
+            let footSectionNodes = [];
+            while (configI < configCnt && (currentConfig = sectionConfigs[configI]).type === 'header') {
+                headSectionNodes.push(this.renderSection(currentConfig, microColGroupNode, true));
+                configI += 1;
+            }
+            while (configI < configCnt && (currentConfig = sectionConfigs[configI]).type === 'body') {
+                bodySectionNodes.push(this.renderSection(currentConfig, microColGroupNode, false));
+                configI += 1;
+            }
+            while (configI < configCnt && (currentConfig = sectionConfigs[configI]).type === 'footer') {
+                footSectionNodes.push(this.renderSection(currentConfig, microColGroupNode, true));
+                configI += 1;
+            }
+            // firefox bug: when setting height on table and there is a thead or tfoot,
+            // the necessary height:100% on the liquid-height body section forces the *whole* table to be taller. (bug #5524)
+            // use getCanVGrowWithinCell as a way to detect table-stupid firefox.
+            // if so, use a simpler dom structure, jam everything into a lone tbody.
+            let isBuggy = !getCanVGrowWithinCell();
+            const roleAttrs = { role: 'rowgroup' };
+            return y('table', {
+                role: 'grid',
+                className: classNames.join(' '),
+                style: { height: props.height },
+            }, Boolean(!isBuggy && headSectionNodes.length) && y('thead', roleAttrs, ...headSectionNodes), Boolean(!isBuggy && bodySectionNodes.length) && y('tbody', roleAttrs, ...bodySectionNodes), Boolean(!isBuggy && footSectionNodes.length) && y('tfoot', roleAttrs, ...footSectionNodes), isBuggy && y('tbody', roleAttrs, ...headSectionNodes, ...bodySectionNodes, ...footSectionNodes));
+        }
+        renderSection(sectionConfig, microColGroupNode, isHeader) {
+            if ('outerContent' in sectionConfig) {
+                return (y(_, { key: sectionConfig.key }, sectionConfig.outerContent));
+            }
+            return (y("tr", { key: sectionConfig.key, role: "presentation", className: getSectionClassNames(sectionConfig, this.props.liquid).join(' ') }, this.renderChunkTd(sectionConfig, microColGroupNode, sectionConfig.chunk, isHeader)));
+        }
+        renderChunkTd(sectionConfig, microColGroupNode, chunkConfig, isHeader) {
+            if ('outerContent' in chunkConfig) {
+                return chunkConfig.outerContent;
+            }
+            let { props } = this;
+            let { forceYScrollbars, scrollerClientWidths, scrollerClientHeights } = this.state;
+            let needsYScrolling = getAllowYScrolling(props, sectionConfig); // TODO: do lazily. do in section config?
+            let isLiquid = getSectionHasLiquidHeight(props, sectionConfig);
+            // for `!props.liquid` - is WHOLE scrollgrid natural height?
+            // TODO: do same thing in advanced scrollgrid? prolly not b/c always has horizontal scrollbars
+            let overflowY = !props.liquid ? 'visible' :
+                forceYScrollbars ? 'scroll' :
+                    !needsYScrolling ? 'hidden' :
+                        'auto';
+            let sectionKey = sectionConfig.key;
+            let content = renderChunkContent(sectionConfig, chunkConfig, {
+                tableColGroupNode: microColGroupNode,
+                tableMinWidth: '',
+                clientWidth: (!props.collapsibleWidth && scrollerClientWidths[sectionKey] !== undefined) ? scrollerClientWidths[sectionKey] : null,
+                clientHeight: scrollerClientHeights[sectionKey] !== undefined ? scrollerClientHeights[sectionKey] : null,
+                expandRows: sectionConfig.expandRows,
+                syncRowHeights: false,
+                rowSyncHeights: [],
+                reportRowHeightChange: () => { },
+            }, isHeader);
+            return y(isHeader ? 'th' : 'td', {
+                ref: chunkConfig.elRef,
+                role: 'presentation',
+            }, y("div", { className: `fc-scroller-harness${isLiquid ? ' fc-scroller-harness-liquid' : ''}` },
+                y(Scroller, { ref: this.scrollerRefs.createRef(sectionKey), elRef: this.scrollerElRefs.createRef(sectionKey), overflowY: overflowY, overflowX: !props.liquid ? 'visible' : 'hidden' /* natural height? */, maxHeight: sectionConfig.maxHeight, liquid: isLiquid, liquidIsAbsolute // because its within a harness
+                    : true }, content)));
+        }
+        _handleScrollerEl(scrollerEl, key) {
+            let section = getSectionByKey(this.props.sections, key);
+            if (section) {
+                setRef(section.chunk.scrollerElRef, scrollerEl);
+            }
+        }
+        componentDidMount() {
+            this.handleSizing();
+            this.context.addResizeHandler(this.handleSizing);
+        }
+        componentDidUpdate() {
+            // TODO: need better solution when state contains non-sizing things
+            this.handleSizing();
+        }
+        componentWillUnmount() {
+            this.context.removeResizeHandler(this.handleSizing);
+        }
+        computeShrinkWidth() {
+            return hasShrinkWidth(this.props.cols)
+                ? computeShrinkWidth(this.scrollerElRefs.getAll())
+                : 0;
+        }
+        computeScrollerDims() {
+            let scrollbarWidth = getScrollbarWidths();
+            let { scrollerRefs, scrollerElRefs } = this;
+            let forceYScrollbars = false;
+            let scrollerClientWidths = {};
+            let scrollerClientHeights = {};
+            for (let sectionKey in scrollerRefs.currentMap) {
+                let scroller = scrollerRefs.currentMap[sectionKey];
+                if (scroller && scroller.needsYScrolling()) {
+                    forceYScrollbars = true;
+                    break;
+                }
+            }
+            for (let section of this.props.sections) {
+                let sectionKey = section.key;
+                let scrollerEl = scrollerElRefs.currentMap[sectionKey];
+                if (scrollerEl) {
+                    let harnessEl = scrollerEl.parentNode; // TODO: weird way to get this. need harness b/c doesn't include table borders
+                    scrollerClientWidths[sectionKey] = Math.floor(harnessEl.getBoundingClientRect().width - (forceYScrollbars
+                        ? scrollbarWidth.y // use global because scroller might not have scrollbars yet but will need them in future
+                        : 0));
+                    scrollerClientHeights[sectionKey] = Math.floor(harnessEl.getBoundingClientRect().height);
+                }
+            }
+            return { forceYScrollbars, scrollerClientWidths, scrollerClientHeights };
+        }
+    }
+    SimpleScrollGrid.addStateEquality({
+        scrollerClientWidths: isPropsEqual,
+        scrollerClientHeights: isPropsEqual,
+    });
+    function getSectionByKey(sections, key) {
+        for (let section of sections) {
+            if (section.key === key) {
+                return section;
+            }
+        }
+        return null;
+    }
+
+    class EventContainer extends BaseComponent {
+        constructor() {
+            super(...arguments);
+            this.handleEl = (el) => {
+                this.el = el;
+                if (el) {
+                    setElSeg(el, this.props.seg);
+                }
+            };
+        }
+        render() {
+            const { props, context } = this;
+            const { options } = context;
+            const { seg } = props;
+            const { eventRange } = seg;
+            const { ui } = eventRange;
+            const renderProps = {
+                event: new EventImpl(context, eventRange.def, eventRange.instance),
+                view: context.viewApi,
+                timeText: props.timeText,
+                textColor: ui.textColor,
+                backgroundColor: ui.backgroundColor,
+                borderColor: ui.borderColor,
+                isDraggable: !props.disableDragging && computeSegDraggable(seg, context),
+                isStartResizable: !props.disableResizing && computeSegStartResizable(seg, context),
+                isEndResizable: !props.disableResizing && computeSegEndResizable(seg),
+                isMirror: Boolean(props.isDragging || props.isResizing || props.isDateSelecting),
+                isStart: Boolean(seg.isStart),
+                isEnd: Boolean(seg.isEnd),
+                isPast: Boolean(props.isPast),
+                isFuture: Boolean(props.isFuture),
+                isToday: Boolean(props.isToday),
+                isSelected: Boolean(props.isSelected),
+                isDragging: Boolean(props.isDragging),
+                isResizing: Boolean(props.isResizing),
+            };
+            return (y(ContentContainer, Object.assign({}, props /* contains children */, { elRef: this.handleEl, elClasses: [
+                    ...getEventClassNames(renderProps),
+                    ...seg.eventRange.ui.classNames,
+                    ...(props.elClasses || []),
+                ], renderProps: renderProps, generatorName: "eventContent", customGenerator: options.eventContent, defaultGenerator: props.defaultGenerator, classNameGenerator: options.eventClassNames, didMount: options.eventDidMount, willUnmount: options.eventWillUnmount })));
+        }
+        componentDidUpdate(prevProps) {
+            if (this.el && this.props.seg !== prevProps.seg) {
+                setElSeg(this.el, this.props.seg);
+            }
+        }
+    }
+
+    // should not be a purecomponent
+    class StandardEvent extends BaseComponent {
+        render() {
+            let { props, context } = this;
+            let { options } = context;
+            let { seg } = props;
+            let { ui } = seg.eventRange;
+            let timeFormat = options.eventTimeFormat || props.defaultTimeFormat;
+            let timeText = buildSegTimeText(seg, timeFormat, context, props.defaultDisplayEventTime, props.defaultDisplayEventEnd);
+            return (y(EventContainer, Object.assign({}, props /* includes elRef */, { elTag: "a", elStyle: {
+                    borderColor: ui.borderColor,
+                    backgroundColor: ui.backgroundColor,
+                }, elAttrs: getSegAnchorAttrs(seg, context), defaultGenerator: renderInnerContent$1, timeText: timeText }), (InnerContent, eventContentArg) => (y(_, null,
+                y(InnerContent, { elTag: "div", elClasses: ['fc-event-main'], elStyle: { color: eventContentArg.textColor } }),
+                Boolean(eventContentArg.isStartResizable) && (y("div", { className: "fc-event-resizer fc-event-resizer-start" })),
+                Boolean(eventContentArg.isEndResizable) && (y("div", { className: "fc-event-resizer fc-event-resizer-end" }))))));
+        }
+    }
+    function renderInnerContent$1(innerProps) {
+        return (y("div", { className: "fc-event-main-frame" },
+            innerProps.timeText && (y("div", { className: "fc-event-time" }, innerProps.timeText)),
+            y("div", { className: "fc-event-title-container" },
+                y("div", { className: "fc-event-title fc-sticky" }, innerProps.event.title || y(_, null, "\u00A0")))));
+    }
+
+    const NowIndicatorContainer = (props) => (y(ViewContextType.Consumer, null, (context) => {
+        let { options } = context;
+        let renderProps = {
+            isAxis: props.isAxis,
+            date: context.dateEnv.toDate(props.date),
+            view: context.viewApi,
+        };
+        return (y(ContentContainer, Object.assign({}, props /* includes children */, { elTag: props.elTag || 'div', renderProps: renderProps, generatorName: "nowIndicatorContent", customGenerator: options.nowIndicatorContent, classNameGenerator: options.nowIndicatorClassNames, didMount: options.nowIndicatorDidMount, willUnmount: options.nowIndicatorWillUnmount })));
+    }));
+
+    const DAY_NUM_FORMAT = createFormatter({ day: 'numeric' });
+    class DayCellContainer extends BaseComponent {
+        constructor() {
+            super(...arguments);
+            this.refineRenderProps = memoizeObjArg(refineRenderProps);
+        }
+        render() {
+            let { props, context } = this;
+            let { options } = context;
+            let renderProps = this.refineRenderProps({
+                date: props.date,
+                dateProfile: props.dateProfile,
+                todayRange: props.todayRange,
+                isMonthStart: props.isMonthStart || false,
+                showDayNumber: props.showDayNumber,
+                extraRenderProps: props.extraRenderProps,
+                viewApi: context.viewApi,
+                dateEnv: context.dateEnv,
+                monthStartFormat: options.monthStartFormat,
+            });
+            return (y(ContentContainer, Object.assign({}, props /* includes children */, { elClasses: [
+                    ...getDayClassNames(renderProps, context.theme),
+                    ...(props.elClasses || []),
+                ], elAttrs: Object.assign(Object.assign({}, props.elAttrs), (renderProps.isDisabled ? {} : { 'data-date': formatDayString(props.date) })), renderProps: renderProps, generatorName: "dayCellContent", customGenerator: options.dayCellContent, defaultGenerator: props.defaultGenerator, classNameGenerator: 
+                // don't use custom classNames if disabled
+                renderProps.isDisabled ? undefined : options.dayCellClassNames, didMount: options.dayCellDidMount, willUnmount: options.dayCellWillUnmount })));
+        }
+    }
+    function hasCustomDayCellContent(options) {
+        return Boolean(options.dayCellContent || hasCustomRenderingHandler('dayCellContent', options));
+    }
+    function refineRenderProps(raw) {
+        let { date, dateEnv, dateProfile, isMonthStart } = raw;
+        let dayMeta = getDateMeta(date, raw.todayRange, null, dateProfile);
+        let dayNumberText = raw.showDayNumber ? (dateEnv.format(date, isMonthStart ? raw.monthStartFormat : DAY_NUM_FORMAT)) : '';
+        return Object.assign(Object.assign(Object.assign({ date: dateEnv.toDate(date), view: raw.viewApi }, dayMeta), { isMonthStart,
+            dayNumberText }), raw.extraRenderProps);
+    }
+
+    class BgEvent extends BaseComponent {
+        render() {
+            let { props } = this;
+            let { seg } = props;
+            return (y(EventContainer, { elTag: "div", elClasses: ['fc-bg-event'], elStyle: { backgroundColor: seg.eventRange.ui.backgroundColor }, defaultGenerator: renderInnerContent, seg: seg, timeText: "", isDragging: false, isResizing: false, isDateSelecting: false, isSelected: false, isPast: props.isPast, isFuture: props.isFuture, isToday: props.isToday, disableDragging: true, disableResizing: true }));
+        }
+    }
+    function renderInnerContent(props) {
+        let { title } = props.event;
+        return title && (y("div", { className: "fc-event-title" }, props.event.title));
+    }
+    function renderFill(fillType) {
+        return (y("div", { className: `fc-${fillType}` }));
+    }
+
+    const WeekNumberContainer = (props) => (y(ViewContextType.Consumer, null, (context) => {
+        let { dateEnv, options } = context;
+        let { date } = props;
+        let format = options.weekNumberFormat || props.defaultFormat;
+        let num = dateEnv.computeWeekNumber(date); // TODO: somehow use for formatting as well?
+        let text = dateEnv.format(date, format);
+        let renderProps = { num, text, date };
+        return (y(ContentContainer // why isn't WeekNumberContentArg being auto-detected?
+        , Object.assign({}, props /* includes children */, { renderProps: renderProps, generatorName: "weekNumberContent", customGenerator: options.weekNumberContent, defaultGenerator: renderInner, classNameGenerator: options.weekNumberClassNames, didMount: options.weekNumberDidMount, willUnmount: options.weekNumberWillUnmount })));
+    }));
+    function renderInner(innerProps) {
+        return innerProps.text;
+    }
+
+    const PADDING_FROM_VIEWPORT = 10;
+    class Popover extends BaseComponent {
+        constructor() {
+            super(...arguments);
+            this.state = {
+                titleId: getUniqueDomId(),
+            };
+            this.handleRootEl = (el) => {
+                this.rootEl = el;
+                if (this.props.elRef) {
+                    setRef(this.props.elRef, el);
+                }
+            };
+            // Triggered when the user clicks *anywhere* in the document, for the autoHide feature
+            this.handleDocumentMouseDown = (ev) => {
+                // only hide the popover if the click happened outside the popover
+                const target = getEventTargetViaRoot(ev);
+                if (!this.rootEl.contains(target)) {
+                    this.handleCloseClick();
+                }
+            };
+            this.handleDocumentKeyDown = (ev) => {
+                if (ev.key === 'Escape') {
+                    this.handleCloseClick();
+                }
+            };
+            this.handleCloseClick = () => {
+                let { onClose } = this.props;
+                if (onClose) {
+                    onClose();
+                }
+            };
+        }
+        render() {
+            let { theme, options } = this.context;
+            let { props, state } = this;
+            let classNames = [
+                'fc-popover',
+                theme.getClass('popover'),
+            ].concat(props.extraClassNames || []);
+            return j(y("div", Object.assign({}, props.extraAttrs, { id: props.id, className: classNames.join(' '), "aria-labelledby": state.titleId, ref: this.handleRootEl }),
+                y("div", { className: 'fc-popover-header ' + theme.getClass('popoverHeader') },
+                    y("span", { className: "fc-popover-title", id: state.titleId }, props.title),
+                    y("span", { className: 'fc-popover-close ' + theme.getIconClass('close'), title: options.closeHint, onClick: this.handleCloseClick })),
+                y("div", { className: 'fc-popover-body ' + theme.getClass('popoverContent') }, props.children)), props.parentEl);
+        }
+        componentDidMount() {
+            document.addEventListener('mousedown', this.handleDocumentMouseDown);
+            document.addEventListener('keydown', this.handleDocumentKeyDown);
+            this.updateSize();
+        }
+        componentWillUnmount() {
+            document.removeEventListener('mousedown', this.handleDocumentMouseDown);
+            document.removeEventListener('keydown', this.handleDocumentKeyDown);
+        }
+        updateSize() {
+            let { isRtl } = this.context;
+            let { alignmentEl, alignGridTop } = this.props;
+            let { rootEl } = this;
+            let alignmentRect = computeClippedClientRect(alignmentEl);
+            if (alignmentRect) {
+                let popoverDims = rootEl.getBoundingClientRect();
+                // position relative to viewport
+                let popoverTop = alignGridTop
+                    ? elementClosest(alignmentEl, '.fc-scrollgrid').getBoundingClientRect().top
+                    : alignmentRect.top;
+                let popoverLeft = isRtl ? alignmentRect.right - popoverDims.width : alignmentRect.left;
+                // constrain
+                popoverTop = Math.max(popoverTop, PADDING_FROM_VIEWPORT);
+                popoverLeft = Math.min(popoverLeft, document.documentElement.clientWidth - PADDING_FROM_VIEWPORT - popoverDims.width);
+                popoverLeft = Math.max(popoverLeft, PADDING_FROM_VIEWPORT);
+                let origin = rootEl.offsetParent.getBoundingClientRect();
+                applyStyle(rootEl, {
+                    top: popoverTop - origin.top,
+                    left: popoverLeft - origin.left,
+                });
+            }
+        }
+    }
+
+    class MorePopover extends DateComponent {
+        constructor() {
+            super(...arguments);
+            this.handleRootEl = (rootEl) => {
+                this.rootEl = rootEl;
+                if (rootEl) {
+                    this.context.registerInteractiveComponent(this, {
+                        el: rootEl,
+                        useEventCenter: false,
+                    });
+                }
+                else {
+                    this.context.unregisterInteractiveComponent(this);
+                }
+            };
+        }
+        render() {
+            let { options, dateEnv } = this.context;
+            let { props } = this;
+            let { startDate, todayRange, dateProfile } = props;
+            let title = dateEnv.format(startDate, options.dayPopoverFormat);
+            return (y(DayCellContainer, { elRef: this.handleRootEl, date: startDate, dateProfile: dateProfile, todayRange: todayRange }, (InnerContent, renderProps, elAttrs) => (y(Popover, { elRef: elAttrs.ref, id: props.id, title: title, extraClassNames: ['fc-more-popover'].concat(elAttrs.className || []), extraAttrs: elAttrs /* TODO: make these time-based when not whole-day? */, parentEl: props.parentEl, alignmentEl: props.alignmentEl, alignGridTop: props.alignGridTop, onClose: props.onClose },
+                hasCustomDayCellContent(options) && (y(InnerContent, { elTag: "div", elClasses: ['fc-more-popover-misc'] })),
+                props.children))));
+        }
+        queryHit(positionLeft, positionTop, elWidth, elHeight) {
+            let { rootEl, props } = this;
+            if (positionLeft >= 0 && positionLeft < elWidth &&
+                positionTop >= 0 && positionTop < elHeight) {
+                return {
+                    dateProfile: props.dateProfile,
+                    dateSpan: Object.assign({ allDay: !props.forceTimed, range: {
+                            start: props.startDate,
+                            end: props.endDate,
+                        } }, props.extraDateSpan),
+                    dayEl: rootEl,
+                    rect: {
+                        left: 0,
+                        top: 0,
+                        right: elWidth,
+                        bottom: elHeight,
+                    },
+                    layer: 1, // important when comparing with hits from other components
+                };
+            }
+            return null;
+        }
+    }
+
+    class MoreLinkContainer extends BaseComponent {
+        constructor() {
+            super(...arguments);
+            this.state = {
+                isPopoverOpen: false,
+                popoverId: getUniqueDomId(),
+            };
+            this.handleLinkEl = (linkEl) => {
+                this.linkEl = linkEl;
+                if (this.props.elRef) {
+                    setRef(this.props.elRef, linkEl);
+                }
+            };
+            this.handleClick = (ev) => {
+                let { props, context } = this;
+                let { moreLinkClick } = context.options;
+                let date = computeRange(props).start;
+                function buildPublicSeg(seg) {
+                    let { def, instance, range } = seg.eventRange;
+                    return {
+                        event: new EventImpl(context, def, instance),
+                        start: context.dateEnv.toDate(range.start),
+                        end: context.dateEnv.toDate(range.end),
+                        isStart: seg.isStart,
+                        isEnd: seg.isEnd,
+                    };
+                }
+                if (typeof moreLinkClick === 'function') {
+                    moreLinkClick = moreLinkClick({
+                        date,
+                        allDay: Boolean(props.allDayDate),
+                        allSegs: props.allSegs.map(buildPublicSeg),
+                        hiddenSegs: props.hiddenSegs.map(buildPublicSeg),
+                        jsEvent: ev,
+                        view: context.viewApi,
+                    });
+                }
+                if (!moreLinkClick || moreLinkClick === 'popover') {
+                    this.setState({ isPopoverOpen: true });
+                }
+                else if (typeof moreLinkClick === 'string') { // a view name
+                    context.calendarApi.zoomTo(date, moreLinkClick);
+                }
+            };
+            this.handlePopoverClose = () => {
+                this.setState({ isPopoverOpen: false });
+            };
+        }
+        render() {
+            let { props, state } = this;
+            return (y(ViewContextType.Consumer, null, (context) => {
+                let { viewApi, options, calendarApi } = context;
+                let { moreLinkText } = options;
+                let { moreCnt } = props;
+                let range = computeRange(props);
+                let text = typeof moreLinkText === 'function' // TODO: eventually use formatWithOrdinals
+                    ? moreLinkText.call(calendarApi, moreCnt)
+                    : `+${moreCnt} ${moreLinkText}`;
+                let hint = formatWithOrdinals(options.moreLinkHint, [moreCnt], text);
+                let renderProps = {
+                    num: moreCnt,
+                    shortText: `+${moreCnt}`,
+                    text,
+                    view: viewApi,
+                };
+                return (y(_, null,
+                    Boolean(props.moreCnt) && (y(ContentContainer, { elTag: props.elTag || 'a', elRef: this.handleLinkEl, elClasses: [
+                            ...(props.elClasses || []),
+                            'fc-more-link',
+                        ], elStyle: props.elStyle, elAttrs: Object.assign(Object.assign(Object.assign({}, props.elAttrs), createAriaClickAttrs(this.handleClick)), { title: hint, 'aria-expanded': state.isPopoverOpen, 'aria-controls': state.isPopoverOpen ? state.popoverId : '' }), renderProps: renderProps, generatorName: "moreLinkContent", customGenerator: options.moreLinkContent, defaultGenerator: props.defaultGenerator || renderMoreLinkInner, classNameGenerator: options.moreLinkClassNames, didMount: options.moreLinkDidMount, willUnmount: options.moreLinkWillUnmount }, props.children)),
+                    state.isPopoverOpen && (y(MorePopover, { id: state.popoverId, startDate: range.start, endDate: range.end, dateProfile: props.dateProfile, todayRange: props.todayRange, extraDateSpan: props.extraDateSpan, parentEl: this.parentEl, alignmentEl: props.alignmentElRef ?
+                            props.alignmentElRef.current :
+                            this.linkEl, alignGridTop: props.alignGridTop, forceTimed: props.forceTimed, onClose: this.handlePopoverClose }, props.popoverContent()))));
+            }));
+        }
+        componentDidMount() {
+            this.updateParentEl();
+        }
+        componentDidUpdate() {
+            this.updateParentEl();
+        }
+        updateParentEl() {
+            if (this.linkEl) {
+                this.parentEl = elementClosest(this.linkEl, '.fc-view-harness');
+            }
+        }
+    }
+    function renderMoreLinkInner(props) {
+        return props.text;
+    }
+    function computeRange(props) {
+        if (props.allDayDate) {
+            return {
+                start: props.allDayDate,
+                end: addDays(props.allDayDate, 1),
+            };
+        }
+        let { hiddenSegs } = props;
+        return {
+            start: computeEarliestSegStart(hiddenSegs),
+            end: computeLatestSegEnd(hiddenSegs),
+        };
+    }
+    function computeEarliestSegStart(segs) {
+        return segs.reduce(pickEarliestStart).eventRange.range.start;
+    }
+    function pickEarliestStart(seg0, seg1) {
+        return seg0.eventRange.range.start < seg1.eventRange.range.start ? seg0 : seg1;
+    }
+    function computeLatestSegEnd(segs) {
+        return segs.reduce(pickLatestEnd).eventRange.range.end;
+    }
+    function pickLatestEnd(seg0, seg1) {
+        return seg0.eventRange.range.end > seg1.eventRange.range.end ? seg0 : seg1;
+    }
+
+    class ViewContainer extends BaseComponent {
+        render() {
+            let { props, context } = this;
+            let { options } = context;
+            let renderProps = { view: context.viewApi };
+            return (y(ContentContainer, Object.assign({}, props, { elTag: props.elTag || 'div', elClasses: [
+                    ...buildViewClassNames(props.viewSpec),
+                    ...(props.elClasses || []),
+                ], renderProps: renderProps, classNameGenerator: options.viewClassNames, generatorName: undefined, didMount: options.viewDidMount, willUnmount: options.viewWillUnmount }), () => props.children));
+        }
+    }
+    function buildViewClassNames(viewSpec) {
+        return [
+            `fc-${viewSpec.type}-view`,
+            'fc-view',
+        ];
+    }
+
+    const EVENT_SOURCE_REFINERS = {
+        id: String,
+        defaultAllDay: Boolean,
+        url: String,
+        format: String,
+        events: identity,
+        eventDataTransform: identity,
+        // for any network-related sources
+        success: identity,
+        failure: identity,
+    };
+    function parseEventSource(raw, context, refiners = buildEventSourceRefiners(context)) {
+        let rawObj;
+        if (typeof raw === 'string') {
+            rawObj = { url: raw };
+        }
+        else if (typeof raw === 'function' || Array.isArray(raw)) {
+            rawObj = { events: raw };
+        }
+        else if (typeof raw === 'object' && raw) { // not null
+            rawObj = raw;
+        }
+        if (rawObj) {
+            let { refined, extra } = refineProps(rawObj, refiners);
+            let metaRes = buildEventSourceMeta(refined, context);
+            if (metaRes) {
+                return {
+                    _raw: raw,
+                    isFetching: false,
+                    latestFetchId: '',
+                    fetchRange: null,
+                    defaultAllDay: refined.defaultAllDay,
+                    eventDataTransform: refined.eventDataTransform,
+                    success: refined.success,
+                    failure: refined.failure,
+                    publicId: refined.id || '',
+                    sourceId: guid(),
+                    sourceDefId: metaRes.sourceDefId,
+                    meta: metaRes.meta,
+                    ui: createEventUi(refined, context),
+                    extendedProps: extra,
+                };
+            }
+        }
+        return null;
+    }
+    function buildEventSourceRefiners(context) {
+        return Object.assign(Object.assign(Object.assign({}, EVENT_UI_REFINERS), EVENT_SOURCE_REFINERS), context.pluginHooks.eventSourceRefiners);
+    }
+    function buildEventSourceMeta(raw, context) {
+        let defs = context.pluginHooks.eventSourceDefs;
+        for (let i = defs.length - 1; i >= 0; i -= 1) { // later-added plugins take precedence
+            let def = defs[i];
+            let meta = def.parseMeta(raw);
+            if (meta) {
+                return { sourceDefId: i, meta };
+            }
+        }
+        return null;
+    }
+
+    class CalendarImpl {
+        getCurrentData() {
+            return this.currentDataManager.getCurrentData();
+        }
+        dispatch(action) {
+            this.currentDataManager.dispatch(action);
+        }
+        get view() { return this.getCurrentData().viewApi; }
+        batchRendering(callback) {
+            callback();
+        }
+        updateSize() {
+            this.trigger('_resize', true);
+        }
+        // Options
+        // -----------------------------------------------------------------------------------------------------------------
+        setOption(name, val) {
+            this.dispatch({
+                type: 'SET_OPTION',
+                optionName: name,
+                rawOptionValue: val,
+            });
+        }
+        getOption(name) {
+            return this.currentDataManager.currentCalendarOptionsInput[name];
+        }
+        getAvailableLocaleCodes() {
+            return Object.keys(this.getCurrentData().availableRawLocales);
+        }
+        // Trigger
+        // -----------------------------------------------------------------------------------------------------------------
+        on(handlerName, handler) {
+            let { currentDataManager } = this;
+            if (currentDataManager.currentCalendarOptionsRefiners[handlerName]) {
+                currentDataManager.emitter.on(handlerName, handler);
+            }
+            else {
+                console.warn(`Unknown listener name '${handlerName}'`);
+            }
+        }
+        off(handlerName, handler) {
+            this.currentDataManager.emitter.off(handlerName, handler);
+        }
+        // not meant for public use
+        trigger(handlerName, ...args) {
+            this.currentDataManager.emitter.trigger(handlerName, ...args);
+        }
+        // View
+        // -----------------------------------------------------------------------------------------------------------------
+        changeView(viewType, dateOrRange) {
+            this.batchRendering(() => {
+                this.unselect();
+                if (dateOrRange) {
+                    if (dateOrRange.start && dateOrRange.end) { // a range
+                        this.dispatch({
+                            type: 'CHANGE_VIEW_TYPE',
+                            viewType,
+                        });
+                        this.dispatch({
+                            type: 'SET_OPTION',
+                            optionName: 'visibleRange',
+                            rawOptionValue: dateOrRange,
+                        });
+                    }
+                    else {
+                        let { dateEnv } = this.getCurrentData();
+                        this.dispatch({
+                            type: 'CHANGE_VIEW_TYPE',
+                            viewType,
+                            dateMarker: dateEnv.createMarker(dateOrRange),
+                        });
+                    }
+                }
+                else {
+                    this.dispatch({
+                        type: 'CHANGE_VIEW_TYPE',
+                        viewType,
+                    });
+                }
+            });
+        }
+        // Forces navigation to a view for the given date.
+        // `viewType` can be a specific view name or a generic one like "week" or "day".
+        // needs to change
+        zoomTo(dateMarker, viewType) {
+            let state = this.getCurrentData();
+            let spec;
+            viewType = viewType || 'day'; // day is default zoom
+            spec = state.viewSpecs[viewType] || this.getUnitViewSpec(viewType);
+            this.unselect();
+            if (spec) {
+                this.dispatch({
+                    type: 'CHANGE_VIEW_TYPE',
+                    viewType: spec.type,
+                    dateMarker,
+                });
+            }
+            else {
+                this.dispatch({
+                    type: 'CHANGE_DATE',
+                    dateMarker,
+                });
+            }
+        }
+        // Given a duration singular unit, like "week" or "day", finds a matching view spec.
+        // Preference is given to views that have corresponding buttons.
+        getUnitViewSpec(unit) {
+            let { viewSpecs, toolbarConfig } = this.getCurrentData();
+            let viewTypes = [].concat(toolbarConfig.header ? toolbarConfig.header.viewsWithButtons : [], toolbarConfig.footer ? toolbarConfig.footer.viewsWithButtons : []);
+            let i;
+            let spec;
+            for (let viewType in viewSpecs) {
+                viewTypes.push(viewType);
+            }
+            for (i = 0; i < viewTypes.length; i += 1) {
+                spec = viewSpecs[viewTypes[i]];
+                if (spec) {
+                    if (spec.singleUnit === unit) {
+                        return spec;
+                    }
+                }
+            }
+            return null;
+        }
+        // Current Date
+        // -----------------------------------------------------------------------------------------------------------------
+        prev() {
+            this.unselect();
+            this.dispatch({ type: 'PREV' });
+        }
+        next() {
+            this.unselect();
+            this.dispatch({ type: 'NEXT' });
+        }
+        prevYear() {
+            let state = this.getCurrentData();
+            this.unselect();
+            this.dispatch({
+                type: 'CHANGE_DATE',
+                dateMarker: state.dateEnv.addYears(state.currentDate, -1),
+            });
+        }
+        nextYear() {
+            let state = this.getCurrentData();
+            this.unselect();
+            this.dispatch({
+                type: 'CHANGE_DATE',
+                dateMarker: state.dateEnv.addYears(state.currentDate, 1),
+            });
+        }
+        today() {
+            let state = this.getCurrentData();
+            this.unselect();
+            this.dispatch({
+                type: 'CHANGE_DATE',
+                dateMarker: state.nowManager.getDateMarker(),
+            });
+        }
+        gotoDate(zonedDateInput) {
+            let state = this.getCurrentData();
+            this.unselect();
+            this.dispatch({
+                type: 'CHANGE_DATE',
+                dateMarker: state.dateEnv.createMarker(zonedDateInput),
+            });
+        }
+        incrementDate(deltaInput) {
+            let state = this.getCurrentData();
+            let delta = createDuration(deltaInput);
+            if (delta) { // else, warn about invalid input?
+                this.unselect();
+                this.dispatch({
+                    type: 'CHANGE_DATE',
+                    dateMarker: state.dateEnv.add(state.currentDate, delta),
+                });
+            }
+        }
+        getDate() {
+            let state = this.getCurrentData();
+            return state.dateEnv.toDate(state.currentDate);
+        }
+        // Date Formatting Utils
+        // -----------------------------------------------------------------------------------------------------------------
+        formatDate(d, formatter) {
+            let { dateEnv } = this.getCurrentData();
+            return dateEnv.format(dateEnv.createMarker(d), createFormatter(formatter));
+        }
+        // `settings` is for formatter AND isEndExclusive
+        formatRange(d0, d1, settings) {
+            let { dateEnv } = this.getCurrentData();
+            return dateEnv.formatRange(dateEnv.createMarker(d0), dateEnv.createMarker(d1), createFormatter(settings), settings);
+        }
+        formatIso(d, omitTime) {
+            let { dateEnv } = this.getCurrentData();
+            return dateEnv.formatIso(dateEnv.createMarker(d), { omitTime });
+        }
+        // Date Selection / Event Selection / DayClick
+        // -----------------------------------------------------------------------------------------------------------------
+        select(dateOrObj, endDate) {
+            let selectionInput;
+            if (endDate == null) {
+                if (dateOrObj.start != null) {
+                    selectionInput = dateOrObj;
+                }
+                else {
+                    selectionInput = {
+                        start: dateOrObj,
+                        end: null,
+                    };
+                }
+            }
+            else {
+                selectionInput = {
+                    start: dateOrObj,
+                    end: endDate,
+                };
+            }
+            let state = this.getCurrentData();
+            let selection = parseDateSpan(selectionInput, state.dateEnv, createDuration({ days: 1 }));
+            if (selection) { // throw parse error otherwise?
+                this.dispatch({ type: 'SELECT_DATES', selection });
+                triggerDateSelect(selection, null, state);
+            }
+        }
+        unselect(pev) {
+            let state = this.getCurrentData();
+            if (state.dateSelection) {
+                this.dispatch({ type: 'UNSELECT_DATES' });
+                triggerDateUnselect(pev, state);
+            }
+        }
+        // Public Events API
+        // -----------------------------------------------------------------------------------------------------------------
+        addEvent(eventInput, sourceInput) {
+            if (eventInput instanceof EventImpl) {
+                let def = eventInput._def;
+                let instance = eventInput._instance;
+                let currentData = this.getCurrentData();
+                // not already present? don't want to add an old snapshot
+                if (!currentData.eventStore.defs[def.defId]) {
+                    this.dispatch({
+                        type: 'ADD_EVENTS',
+                        eventStore: eventTupleToStore({ def, instance }), // TODO: better util for two args?
+                    });
+                    this.triggerEventAdd(eventInput);
+                }
+                return eventInput;
+            }
+            let state = this.getCurrentData();
+            let eventSource;
+            if (sourceInput instanceof EventSourceImpl) {
+                eventSource = sourceInput.internalEventSource;
+            }
+            else if (typeof sourceInput === 'boolean') {
+                if (sourceInput) { // true. part of the first event source
+                    [eventSource] = hashValuesToArray(state.eventSources);
+                }
+            }
+            else if (sourceInput != null) { // an ID. accepts a number too
+                let sourceApi = this.getEventSourceById(sourceInput); // TODO: use an internal function
+                if (!sourceApi) {
+                    console.warn(`Could not find an event source with ID "${sourceInput}"`); // TODO: test
+                    return null;
+                }
+                eventSource = sourceApi.internalEventSource;
+            }
+            let tuple = parseEvent(eventInput, eventSource, state, false);
+            if (tuple) {
+                let newEventApi = new EventImpl(state, tuple.def, tuple.def.recurringDef ? null : tuple.instance);
+                this.dispatch({
+                    type: 'ADD_EVENTS',
+                    eventStore: eventTupleToStore(tuple),
+                });
+                this.triggerEventAdd(newEventApi);
+                return newEventApi;
+            }
+            return null;
+        }
+        triggerEventAdd(eventApi) {
+            let { emitter } = this.getCurrentData();
+            emitter.trigger('eventAdd', {
+                event: eventApi,
+                relatedEvents: [],
+                revert: () => {
+                    this.dispatch({
+                        type: 'REMOVE_EVENTS',
+                        eventStore: eventApiToStore(eventApi),
+                    });
+                },
+            });
+        }
+        // TODO: optimize
+        getEventById(id) {
+            let state = this.getCurrentData();
+            let { defs, instances } = state.eventStore;
+            id = String(id);
+            for (let defId in defs) {
+                let def = defs[defId];
+                if (def.publicId === id) {
+                    if (def.recurringDef) {
+                        return new EventImpl(state, def, null);
+                    }
+                    for (let instanceId in instances) {
+                        let instance = instances[instanceId];
+                        if (instance.defId === def.defId) {
+                            return new EventImpl(state, def, instance);
+                        }
+                    }
+                }
+            }
+            return null;
+        }
+        getEvents() {
+            let currentData = this.getCurrentData();
+            return buildEventApis(currentData.eventStore, currentData);
+        }
+        removeAllEvents() {
+            this.dispatch({ type: 'REMOVE_ALL_EVENTS' });
+        }
+        // Public Event Sources API
+        // -----------------------------------------------------------------------------------------------------------------
+        getEventSources() {
+            let state = this.getCurrentData();
+            let sourceHash = state.eventSources;
+            let sourceApis = [];
+            for (let internalId in sourceHash) {
+                sourceApis.push(new EventSourceImpl(state, sourceHash[internalId]));
+            }
+            return sourceApis;
+        }
+        getEventSourceById(id) {
+            let state = this.getCurrentData();
+            let sourceHash = state.eventSources;
+            id = String(id);
+            for (let sourceId in sourceHash) {
+                if (sourceHash[sourceId].publicId === id) {
+                    return new EventSourceImpl(state, sourceHash[sourceId]);
+                }
+            }
+            return null;
+        }
+        addEventSource(sourceInput) {
+            let state = this.getCurrentData();
+            if (sourceInput instanceof EventSourceImpl) {
+                // not already present? don't want to add an old snapshot
+                if (!state.eventSources[sourceInput.internalEventSource.sourceId]) {
+                    this.dispatch({
+                        type: 'ADD_EVENT_SOURCES',
+                        sources: [sourceInput.internalEventSource],
+                    });
+                }
+                return sourceInput;
+            }
+            let eventSource = parseEventSource(sourceInput, state);
+            if (eventSource) { // TODO: error otherwise?
+                this.dispatch({ type: 'ADD_EVENT_SOURCES', sources: [eventSource] });
+                return new EventSourceImpl(state, eventSource);
+            }
+            return null;
+        }
+        removeAllEventSources() {
+            this.dispatch({ type: 'REMOVE_ALL_EVENT_SOURCES' });
+        }
+        refetchEvents() {
+            this.dispatch({ type: 'FETCH_EVENT_SOURCES', isRefetch: true });
+        }
+        // Scroll
+        // -----------------------------------------------------------------------------------------------------------------
+        scrollToTime(timeInput) {
+            let time = createDuration(timeInput);
+            if (time) {
+                this.trigger('_scrollRequest', { time });
+            }
+        }
+    }
+
+    class Store {
+        constructor() {
+            this.handlers = [];
+        }
+        set(value) {
+            this.currentValue = value;
+            for (let handler of this.handlers) {
+                handler(value);
+            }
+        }
+        subscribe(handler) {
+            this.handlers.push(handler);
+            if (this.currentValue !== undefined) {
+                handler(this.currentValue);
+            }
+        }
+    }
+
+    /*
+    Subscribers will get a LIST of CustomRenderings
+    */
+    class CustomRenderingStore extends Store {
+        constructor() {
+            super(...arguments);
+            this.map = new Map();
+        }
+        // for consistent order
+        handle(customRendering) {
+            const { map } = this;
+            let updated = false;
+            if (customRendering.isActive) {
+                map.set(customRendering.id, customRendering);
+                updated = true;
+            }
+            else if (map.has(customRendering.id)) {
+                map.delete(customRendering.id);
+                updated = true;
+            }
+            if (updated) {
+                this.set(map);
+            }
+        }
+    }
+
+    var internal = {
+        __proto__: null,
+        BASE_OPTION_DEFAULTS: BASE_OPTION_DEFAULTS,
+        identity: identity,
+        refineProps: refineProps,
+        createEventInstance: createEventInstance,
+        parseEventDef: parseEventDef,
+        refineEventDef: refineEventDef,
+        parseBusinessHours: parseBusinessHours,
+        padStart: padStart,
+        isInt: isInt,
+        parseFieldSpecs: parseFieldSpecs,
+        compareByFieldSpecs: compareByFieldSpecs,
+        flexibleCompare: flexibleCompare,
+        preventSelection: preventSelection,
+        allowSelection: allowSelection,
+        preventContextMenu: preventContextMenu,
+        allowContextMenu: allowContextMenu,
+        compareNumbers: compareNumbers,
+        enableCursor: enableCursor,
+        disableCursor: disableCursor,
+        guid: guid,
+        computeVisibleDayRange: computeVisibleDayRange,
+        isMultiDayRange: isMultiDayRange,
+        diffDates: diffDates,
+        removeExact: removeExact,
+        isArraysEqual: isArraysEqual,
+        memoize: memoize,
+        memoizeObjArg: memoizeObjArg,
+        memoizeArraylike: memoizeArraylike,
+        memoizeHashlike: memoizeHashlike,
+        intersectRects: intersectRects,
+        pointInsideRect: pointInsideRect,
+        constrainPoint: constrainPoint,
+        getRectCenter: getRectCenter,
+        diffPoints: diffPoints,
+        translateRect: translateRect,
+        mapHash: mapHash,
+        filterHash: filterHash,
+        isPropsEqual: isPropsEqual,
+        compareObjs: compareObjs,
+        collectFromHash: collectFromHash,
+        findElements: findElements,
+        findDirectChildren: findDirectChildren,
+        removeElement: removeElement,
+        applyStyle: applyStyle,
+        elementMatches: elementMatches,
+        elementClosest: elementClosest,
+        getEventTargetViaRoot: getEventTargetViaRoot,
+        getUniqueDomId: getUniqueDomId,
+        parseClassNames: parseClassNames,
+        getCanVGrowWithinCell: getCanVGrowWithinCell,
+        createEmptyEventStore: createEmptyEventStore,
+        mergeEventStores: mergeEventStores,
+        getRelevantEvents: getRelevantEvents,
+        eventTupleToStore: eventTupleToStore,
+        combineEventUis: combineEventUis,
+        createEventUi: createEventUi,
+        Splitter: Splitter,
+        getDayClassNames: getDayClassNames,
+        getDateMeta: getDateMeta,
+        getSlotClassNames: getSlotClassNames,
+        buildNavLinkAttrs: buildNavLinkAttrs,
+        preventDefault: preventDefault,
+        whenTransitionDone: whenTransitionDone,
+        computeInnerRect: computeInnerRect,
+        computeEdges: computeEdges,
+        getClippingParents: getClippingParents,
+        computeRect: computeRect,
+        unpromisify: unpromisify,
+        Emitter: Emitter,
+        rangeContainsMarker: rangeContainsMarker,
+        intersectRanges: intersectRanges,
+        rangesEqual: rangesEqual,
+        rangesIntersect: rangesIntersect,
+        rangeContainsRange: rangeContainsRange,
+        PositionCache: PositionCache,
+        ScrollController: ScrollController,
+        ElementScrollController: ElementScrollController,
+        WindowScrollController: WindowScrollController,
+        Theme: Theme,
+        ViewContextType: ViewContextType,
+        DateComponent: DateComponent,
+        DateProfileGenerator: DateProfileGenerator,
+        isDateSpansEqual: isDateSpansEqual,
+        addDays: addDays,
+        startOfDay: startOfDay,
+        addMs: addMs,
+        addWeeks: addWeeks,
+        diffWeeks: diffWeeks,
+        diffWholeWeeks: diffWholeWeeks,
+        diffWholeDays: diffWholeDays,
+        diffDayAndTime: diffDayAndTime,
+        diffDays: diffDays,
+        isValidDate: isValidDate,
+        createDuration: createDuration,
+        asCleanDays: asCleanDays,
+        multiplyDuration: multiplyDuration,
+        addDurations: addDurations,
+        asRoughMinutes: asRoughMinutes,
+        asRoughSeconds: asRoughSeconds,
+        asRoughMs: asRoughMs,
+        wholeDivideDurations: wholeDivideDurations,
+        greatestDurationDenominator: greatestDurationDenominator,
+        DateEnv: DateEnv,
+        createFormatter: createFormatter,
+        formatIsoTimeString: formatIsoTimeString,
+        formatDayString: formatDayString,
+        buildIsoString: buildIsoString,
+        formatIsoMonthStr: formatIsoMonthStr,
+        NamedTimeZoneImpl: NamedTimeZoneImpl,
+        parseMarker: parse,
+        SegHierarchy: SegHierarchy,
+        buildEntryKey: buildEntryKey,
+        getEntrySpanEnd: getEntrySpanEnd,
+        binarySearch: binarySearch,
+        groupIntersectingEntries: groupIntersectingEntries,
+        intersectSpans: intersectSpans,
+        Interaction: Interaction,
+        interactionSettingsToStore: interactionSettingsToStore,
+        interactionSettingsStore: interactionSettingsStore,
+        ElementDragging: ElementDragging,
+        config: config,
+        parseDragMeta: parseDragMeta,
+        CalendarRoot: CalendarRoot,
+        DayHeader: DayHeader,
+        computeFallbackHeaderFormat: computeFallbackHeaderFormat,
+        TableDateCell: TableDateCell,
+        TableDowCell: TableDowCell,
+        DaySeriesModel: DaySeriesModel,
+        sliceEventStore: sliceEventStore,
+        hasBgRendering: hasBgRendering,
+        getElSeg: getElSeg,
+        buildSegTimeText: buildSegTimeText,
+        sortEventSegs: sortEventSegs,
+        getSegMeta: getSegMeta,
+        buildEventRangeKey: buildEventRangeKey,
+        getSegAnchorAttrs: getSegAnchorAttrs,
+        DayTableModel: DayTableModel,
+        Slicer: Slicer,
+        applyMutationToEventStore: applyMutationToEventStore,
+        isPropsValid: isPropsValid,
+        isInteractionValid: isInteractionValid,
+        isDateSelectionValid: isDateSelectionValid,
+        requestJson: requestJson,
+        BaseComponent: BaseComponent,
+        setRef: setRef,
+        DelayedRunner: DelayedRunner,
+        SimpleScrollGrid: SimpleScrollGrid,
+        hasShrinkWidth: hasShrinkWidth,
+        renderMicroColGroup: renderMicroColGroup,
+        getScrollGridClassNames: getScrollGridClassNames,
+        getSectionClassNames: getSectionClassNames,
+        getSectionHasLiquidHeight: getSectionHasLiquidHeight,
+        getAllowYScrolling: getAllowYScrolling,
+        renderChunkContent: renderChunkContent,
+        computeShrinkWidth: computeShrinkWidth,
+        sanitizeShrinkWidth: sanitizeShrinkWidth,
+        isColPropsEqual: isColPropsEqual,
+        renderScrollShim: renderScrollShim,
+        getStickyFooterScrollbar: getStickyFooterScrollbar,
+        getStickyHeaderDates: getStickyHeaderDates,
+        Scroller: Scroller,
+        getScrollbarWidths: getScrollbarWidths,
+        RefMap: RefMap,
+        getIsRtlScrollbarOnLeft: getIsRtlScrollbarOnLeft,
+        NowTimer: NowTimer,
+        ScrollResponder: ScrollResponder,
+        StandardEvent: StandardEvent,
+        NowIndicatorContainer: NowIndicatorContainer,
+        DayCellContainer: DayCellContainer,
+        hasCustomDayCellContent: hasCustomDayCellContent,
+        EventContainer: EventContainer,
+        renderFill: renderFill,
+        BgEvent: BgEvent,
+        WeekNumberContainer: WeekNumberContainer,
+        MoreLinkContainer: MoreLinkContainer,
+        computeEarliestSegStart: computeEarliestSegStart,
+        ViewContainer: ViewContainer,
+        triggerDateSelect: triggerDateSelect,
+        getDefaultEventEnd: getDefaultEventEnd,
+        injectStyles: injectStyles,
+        CalendarImpl: CalendarImpl,
+        EventImpl: EventImpl,
+        buildEventApis: buildEventApis,
+        buildElAttrs: buildElAttrs,
+        ContentContainer: ContentContainer,
+        CustomRenderingStore: CustomRenderingStore
+    };
+
+    const globalLocales = [];
+
+    const MINIMAL_RAW_EN_LOCALE = {
+        code: 'en',
+        week: {
+            dow: 0,
+            doy: 4, // 4 days need to be within the year to be considered the first week
+        },
+        direction: 'ltr',
+        buttonText: {
+            prev: 'prev',
+            next: 'next',
+            prevYear: 'prev year',
+            nextYear: 'next year',
+            year: 'year',
+            today: 'today',
+            month: 'month',
+            week: 'week',
+            day: 'day',
+            list: 'list',
+        },
+        weekText: 'W',
+        weekTextLong: 'Week',
+        closeHint: 'Close',
+        timeHint: 'Time',
+        eventHint: 'Event',
+        allDayText: 'all-day',
+        moreLinkText: 'more',
+        noEventsText: 'No events to display',
+    };
+    const RAW_EN_LOCALE = Object.assign(Object.assign({}, MINIMAL_RAW_EN_LOCALE), { 
+        // Includes things we don't want other locales to inherit,
+        // things that derive from other translatable strings.
+        buttonHints: {
+            prev: 'Previous $0',
+            next: 'Next $0',
+            today(buttonText, unit) {
+                return (unit === 'day')
+                    ? 'Today'
+                    : `This ${buttonText}`;
+            },
+        }, viewHint: '$0 view', navLinkHint: 'Go to $0', moreLinkHint(eventCnt) {
+            return `Show ${eventCnt} more event${eventCnt === 1 ? '' : 's'}`;
+        } });
+    function organizeRawLocales(explicitRawLocales) {
+        let defaultCode = explicitRawLocales.length > 0 ? explicitRawLocales[0].code : 'en';
+        let allRawLocales = globalLocales.concat(explicitRawLocales);
+        let rawLocaleMap = {
+            en: RAW_EN_LOCALE,
+        };
+        for (let rawLocale of allRawLocales) {
+            rawLocaleMap[rawLocale.code] = rawLocale;
+        }
+        return {
+            map: rawLocaleMap,
+            defaultCode,
+        };
+    }
+    function buildLocale(inputSingular, available) {
+        if (typeof inputSingular === 'object' && !Array.isArray(inputSingular)) {
+            return parseLocale(inputSingular.code, [inputSingular.code], inputSingular);
+        }
+        return queryLocale(inputSingular, available);
+    }
+    function queryLocale(codeArg, available) {
+        let codes = [].concat(codeArg || []); // will convert to array
+        let raw = queryRawLocale(codes, available) || RAW_EN_LOCALE;
+        return parseLocale(codeArg, codes, raw);
+    }
+    function queryRawLocale(codes, available) {
+        for (let i = 0; i < codes.length; i += 1) {
+            let parts = codes[i].toLocaleLowerCase().split('-');
+            for (let j = parts.length; j > 0; j -= 1) {
+                let simpleId = parts.slice(0, j).join('-');
+                if (available[simpleId]) {
+                    return available[simpleId];
+                }
+            }
+        }
+        return null;
+    }
+    function parseLocale(codeArg, codes, raw) {
+        let merged = mergeProps([MINIMAL_RAW_EN_LOCALE, raw], ['buttonText']);
+        delete merged.code; // don't want this part of the options
+        let { week } = merged;
+        delete merged.week;
+        return {
+            codeArg,
+            codes,
+            week,
+            simpleNumberFormat: new Intl.NumberFormat(codeArg),
+            options: merged,
+        };
+    }
+
+    // TODO: easier way to add new hooks? need to update a million things
+    function createPlugin(input) {
+        return {
+            id: guid(),
+            name: input.name,
+            premiumReleaseDate: input.premiumReleaseDate ? new Date(input.premiumReleaseDate) : undefined,
+            deps: input.deps || [],
+            reducers: input.reducers || [],
+            isLoadingFuncs: input.isLoadingFuncs || [],
+            contextInit: [].concat(input.contextInit || []),
+            eventRefiners: input.eventRefiners || {},
+            eventDefMemberAdders: input.eventDefMemberAdders || [],
+            eventSourceRefiners: input.eventSourceRefiners || {},
+            isDraggableTransformers: input.isDraggableTransformers || [],
+            eventDragMutationMassagers: input.eventDragMutationMassagers || [],
+            eventDefMutationAppliers: input.eventDefMutationAppliers || [],
+            dateSelectionTransformers: input.dateSelectionTransformers || [],
+            datePointTransforms: input.datePointTransforms || [],
+            dateSpanTransforms: input.dateSpanTransforms || [],
+            views: input.views || {},
+            viewPropsTransformers: input.viewPropsTransformers || [],
+            isPropsValid: input.isPropsValid || null,
+            externalDefTransforms: input.externalDefTransforms || [],
+            viewContainerAppends: input.viewContainerAppends || [],
+            eventDropTransformers: input.eventDropTransformers || [],
+            componentInteractions: input.componentInteractions || [],
+            calendarInteractions: input.calendarInteractions || [],
+            themeClasses: input.themeClasses || {},
+            eventSourceDefs: input.eventSourceDefs || [],
+            cmdFormatter: input.cmdFormatter,
+            recurringTypes: input.recurringTypes || [],
+            namedTimeZonedImpl: input.namedTimeZonedImpl,
+            initialView: input.initialView || '',
+            elementDraggingImpl: input.elementDraggingImpl,
+            optionChangeHandlers: input.optionChangeHandlers || {},
+            scrollGridImpl: input.scrollGridImpl || null,
+            listenerRefiners: input.listenerRefiners || {},
+            optionRefiners: input.optionRefiners || {},
+            propSetHandlers: input.propSetHandlers || {},
+        };
+    }
+    function buildPluginHooks(pluginDefs, globalDefs) {
+        let currentPluginIds = {};
+        let hooks = {
+            premiumReleaseDate: undefined,
+            reducers: [],
+            isLoadingFuncs: [],
+            contextInit: [],
+            eventRefiners: {},
+            eventDefMemberAdders: [],
+            eventSourceRefiners: {},
+            isDraggableTransformers: [],
+            eventDragMutationMassagers: [],
+            eventDefMutationAppliers: [],
+            dateSelectionTransformers: [],
+            datePointTransforms: [],
+            dateSpanTransforms: [],
+            views: {},
+            viewPropsTransformers: [],
+            isPropsValid: null,
+            externalDefTransforms: [],
+            viewContainerAppends: [],
+            eventDropTransformers: [],
+            componentInteractions: [],
+            calendarInteractions: [],
+            themeClasses: {},
+            eventSourceDefs: [],
+            cmdFormatter: null,
+            recurringTypes: [],
+            namedTimeZonedImpl: null,
+            initialView: '',
+            elementDraggingImpl: null,
+            optionChangeHandlers: {},
+            scrollGridImpl: null,
+            listenerRefiners: {},
+            optionRefiners: {},
+            propSetHandlers: {},
+        };
+        function addDefs(defs) {
+            for (let def of defs) {
+                const pluginName = def.name;
+                const currentId = currentPluginIds[pluginName];
+                if (currentId === undefined) {
+                    currentPluginIds[pluginName] = def.id;
+                    addDefs(def.deps);
+                    hooks = combineHooks(hooks, def);
+                }
+                else if (currentId !== def.id) {
+                    // different ID than the one already added
+                    console.warn(`Duplicate plugin '${pluginName}'`);
+                }
+            }
+        }
+        if (pluginDefs) {
+            addDefs(pluginDefs);
+        }
+        addDefs(globalDefs);
+        return hooks;
+    }
+    function buildBuildPluginHooks() {
+        let currentOverrideDefs = [];
+        let currentGlobalDefs = [];
+        let currentHooks;
+        return (overrideDefs, globalDefs) => {
+            if (!currentHooks || !isArraysEqual(overrideDefs, currentOverrideDefs) || !isArraysEqual(globalDefs, currentGlobalDefs)) {
+                currentHooks = buildPluginHooks(overrideDefs, globalDefs);
+            }
+            currentOverrideDefs = overrideDefs;
+            currentGlobalDefs = globalDefs;
+            return currentHooks;
+        };
+    }
+    function combineHooks(hooks0, hooks1) {
+        return {
+            premiumReleaseDate: compareOptionalDates(hooks0.premiumReleaseDate, hooks1.premiumReleaseDate),
+            reducers: hooks0.reducers.concat(hooks1.reducers),
+            isLoadingFuncs: hooks0.isLoadingFuncs.concat(hooks1.isLoadingFuncs),
+            contextInit: hooks0.contextInit.concat(hooks1.contextInit),
+            eventRefiners: Object.assign(Object.assign({}, hooks0.eventRefiners), hooks1.eventRefiners),
+            eventDefMemberAdders: hooks0.eventDefMemberAdders.concat(hooks1.eventDefMemberAdders),
+            eventSourceRefiners: Object.assign(Object.assign({}, hooks0.eventSourceRefiners), hooks1.eventSourceRefiners),
+            isDraggableTransformers: hooks0.isDraggableTransformers.concat(hooks1.isDraggableTransformers),
+            eventDragMutationMassagers: hooks0.eventDragMutationMassagers.concat(hooks1.eventDragMutationMassagers),
+            eventDefMutationAppliers: hooks0.eventDefMutationAppliers.concat(hooks1.eventDefMutationAppliers),
+            dateSelectionTransformers: hooks0.dateSelectionTransformers.concat(hooks1.dateSelectionTransformers),
+            datePointTransforms: hooks0.datePointTransforms.concat(hooks1.datePointTransforms),
+            dateSpanTransforms: hooks0.dateSpanTransforms.concat(hooks1.dateSpanTransforms),
+            views: Object.assign(Object.assign({}, hooks0.views), hooks1.views),
+            viewPropsTransformers: hooks0.viewPropsTransformers.concat(hooks1.viewPropsTransformers),
+            isPropsValid: hooks1.isPropsValid || hooks0.isPropsValid,
+            externalDefTransforms: hooks0.externalDefTransforms.concat(hooks1.externalDefTransforms),
+            viewContainerAppends: hooks0.viewContainerAppends.concat(hooks1.viewContainerAppends),
+            eventDropTransformers: hooks0.eventDropTransformers.concat(hooks1.eventDropTransformers),
+            calendarInteractions: hooks0.calendarInteractions.concat(hooks1.calendarInteractions),
+            componentInteractions: hooks0.componentInteractions.concat(hooks1.componentInteractions),
+            themeClasses: Object.assign(Object.assign({}, hooks0.themeClasses), hooks1.themeClasses),
+            eventSourceDefs: hooks0.eventSourceDefs.concat(hooks1.eventSourceDefs),
+            cmdFormatter: hooks1.cmdFormatter || hooks0.cmdFormatter,
+            recurringTypes: hooks0.recurringTypes.concat(hooks1.recurringTypes),
+            namedTimeZonedImpl: hooks1.namedTimeZonedImpl || hooks0.namedTimeZonedImpl,
+            initialView: hooks0.initialView || hooks1.initialView,
+            elementDraggingImpl: hooks0.elementDraggingImpl || hooks1.elementDraggingImpl,
+            optionChangeHandlers: Object.assign(Object.assign({}, hooks0.optionChangeHandlers), hooks1.optionChangeHandlers),
+            scrollGridImpl: hooks1.scrollGridImpl || hooks0.scrollGridImpl,
+            listenerRefiners: Object.assign(Object.assign({}, hooks0.listenerRefiners), hooks1.listenerRefiners),
+            optionRefiners: Object.assign(Object.assign({}, hooks0.optionRefiners), hooks1.optionRefiners),
+            propSetHandlers: Object.assign(Object.assign({}, hooks0.propSetHandlers), hooks1.propSetHandlers),
+        };
+    }
+    function compareOptionalDates(date0, date1) {
+        if (date0 === undefined) {
+            return date1;
+        }
+        if (date1 === undefined) {
+            return date0;
+        }
+        return new Date(Math.max(date0.valueOf(), date1.valueOf()));
+    }
+
+    class StandardTheme extends Theme {
+    }
+    StandardTheme.prototype.classes = {
+        root: 'fc-theme-standard',
+        tableCellShaded: 'fc-cell-shaded',
+        buttonGroup: 'fc-button-group',
+        button: 'fc-button fc-button-primary',
+        buttonActive: 'fc-button-active',
+    };
+    StandardTheme.prototype.baseIconClass = 'fc-icon';
+    StandardTheme.prototype.iconClasses = {
+        close: 'fc-icon-x',
+        prev: 'fc-icon-chevron-left',
+        next: 'fc-icon-chevron-right',
+        prevYear: 'fc-icon-chevrons-left',
+        nextYear: 'fc-icon-chevrons-right',
+    };
+    StandardTheme.prototype.rtlIconClasses = {
+        prev: 'fc-icon-chevron-right',
+        next: 'fc-icon-chevron-left',
+        prevYear: 'fc-icon-chevrons-right',
+        nextYear: 'fc-icon-chevrons-left',
+    };
+    StandardTheme.prototype.iconOverrideOption = 'buttonIcons'; // TODO: make TS-friendly
+    StandardTheme.prototype.iconOverrideCustomButtonOption = 'icon';
+    StandardTheme.prototype.iconOverridePrefix = 'fc-icon-';
+
+    function compileViewDefs(defaultConfigs, overrideConfigs) {
+        let hash = {};
+        let viewType;
+        for (viewType in defaultConfigs) {
+            ensureViewDef(viewType, hash, defaultConfigs, overrideConfigs);
+        }
+        for (viewType in overrideConfigs) {
+            ensureViewDef(viewType, hash, defaultConfigs, overrideConfigs);
+        }
+        return hash;
+    }
+    function ensureViewDef(viewType, hash, defaultConfigs, overrideConfigs) {
+        if (hash[viewType]) {
+            return hash[viewType];
+        }
+        let viewDef = buildViewDef(viewType, hash, defaultConfigs, overrideConfigs);
+        if (viewDef) {
+            hash[viewType] = viewDef;
+        }
+        return viewDef;
+    }
+    function buildViewDef(viewType, hash, defaultConfigs, overrideConfigs) {
+        let defaultConfig = defaultConfigs[viewType];
+        let overrideConfig = overrideConfigs[viewType];
+        let queryProp = (name) => ((defaultConfig && defaultConfig[name] !== null) ? defaultConfig[name] :
+            ((overrideConfig && overrideConfig[name] !== null) ? overrideConfig[name] : null));
+        let theComponent = queryProp('component');
+        let superType = queryProp('superType');
+        let superDef = null;
+        if (superType) {
+            if (superType === viewType) {
+                throw new Error('Can\'t have a custom view type that references itself');
+            }
+            superDef = ensureViewDef(superType, hash, defaultConfigs, overrideConfigs);
+        }
+        if (!theComponent && superDef) {
+            theComponent = superDef.component;
+        }
+        if (!theComponent) {
+            return null; // don't throw a warning, might be settings for a single-unit view
+        }
+        return {
+            type: viewType,
+            component: theComponent,
+            defaults: Object.assign(Object.assign({}, (superDef ? superDef.defaults : {})), (defaultConfig ? defaultConfig.rawOptions : {})),
+            overrides: Object.assign(Object.assign({}, (superDef ? superDef.overrides : {})), (overrideConfig ? overrideConfig.rawOptions : {})),
+        };
+    }
+
+    function parseViewConfigs(inputs) {
+        return mapHash(inputs, parseViewConfig);
+    }
+    function parseViewConfig(input) {
+        let rawOptions = typeof input === 'function' ?
+            { component: input } :
+            input;
+        let { component } = rawOptions;
+        if (rawOptions.content) {
+            // TODO: remove content/classNames/didMount/etc from options?
+            component = createViewHookComponent(rawOptions);
+        }
+        else if (component && !(component.prototype instanceof BaseComponent)) {
+            // WHY?: people were using `component` property for `content`
+            // TODO: converge on one setting name
+            component = createViewHookComponent(Object.assign(Object.assign({}, rawOptions), { content: component }));
+        }
+        return {
+            superType: rawOptions.type,
+            component: component,
+            rawOptions, // includes type and component too :(
+        };
+    }
+    function createViewHookComponent(options) {
+        return (viewProps) => (y(ViewContextType.Consumer, null, (context) => (y(ContentContainer, { elTag: "div", elClasses: buildViewClassNames(context.viewSpec), renderProps: Object.assign(Object.assign({}, viewProps), { nextDayThreshold: context.options.nextDayThreshold }), generatorName: undefined, customGenerator: options.content, classNameGenerator: options.classNames, didMount: options.didMount, willUnmount: options.willUnmount }))));
+    }
+
+    function buildViewSpecs(defaultInputs, optionOverrides, dynamicOptionOverrides, localeDefaults) {
+        let defaultConfigs = parseViewConfigs(defaultInputs);
+        let overrideConfigs = parseViewConfigs(optionOverrides.views);
+        let viewDefs = compileViewDefs(defaultConfigs, overrideConfigs);
+        return mapHash(viewDefs, (viewDef) => buildViewSpec(viewDef, overrideConfigs, optionOverrides, dynamicOptionOverrides, localeDefaults));
+    }
+    function buildViewSpec(viewDef, overrideConfigs, optionOverrides, dynamicOptionOverrides, localeDefaults) {
+        let durationInput = viewDef.overrides.duration ||
+            viewDef.defaults.duration ||
+            dynamicOptionOverrides.duration ||
+            optionOverrides.duration;
+        let duration = null;
+        let durationUnit = '';
+        let singleUnit = '';
+        let singleUnitOverrides = {};
+        if (durationInput) {
+            duration = createDurationCached(durationInput);
+            if (duration) { // valid?
+                let denom = greatestDurationDenominator(duration);
+                durationUnit = denom.unit;
+                if (denom.value === 1) {
+                    singleUnit = durationUnit;
+                    singleUnitOverrides = overrideConfigs[durationUnit] ? overrideConfigs[durationUnit].rawOptions : {};
+                }
+            }
+        }
+        let queryButtonText = (optionsSubset) => {
+            let buttonTextMap = optionsSubset.buttonText || {};
+            let buttonTextKey = viewDef.defaults.buttonTextKey;
+            if (buttonTextKey != null && buttonTextMap[buttonTextKey] != null) {
+                return buttonTextMap[buttonTextKey];
+            }
+            if (buttonTextMap[viewDef.type] != null) {
+                return buttonTextMap[viewDef.type];
+            }
+            if (buttonTextMap[singleUnit] != null) {
+                return buttonTextMap[singleUnit];
+            }
+            return null;
+        };
+        let queryButtonTitle = (optionsSubset) => {
+            let buttonHints = optionsSubset.buttonHints || {};
+            let buttonKey = viewDef.defaults.buttonTextKey; // use same key as text
+            if (buttonKey != null && buttonHints[buttonKey] != null) {
+                return buttonHints[buttonKey];
+            }
+            if (buttonHints[viewDef.type] != null) {
+                return buttonHints[viewDef.type];
+            }
+            if (buttonHints[singleUnit] != null) {
+                return buttonHints[singleUnit];
+            }
+            return null;
+        };
+        return {
+            type: viewDef.type,
+            component: viewDef.component,
+            duration,
+            durationUnit,
+            singleUnit,
+            optionDefaults: viewDef.defaults,
+            optionOverrides: Object.assign(Object.assign({}, singleUnitOverrides), viewDef.overrides),
+            buttonTextOverride: queryButtonText(dynamicOptionOverrides) ||
+                queryButtonText(optionOverrides) || // constructor-specified buttonText lookup hash takes precedence
+                viewDef.overrides.buttonText,
+            buttonTextDefault: queryButtonText(localeDefaults) ||
+                viewDef.defaults.buttonText ||
+                queryButtonText(BASE_OPTION_DEFAULTS) ||
+                viewDef.type,
+            // not DRY
+            buttonTitleOverride: queryButtonTitle(dynamicOptionOverrides) ||
+                queryButtonTitle(optionOverrides) ||
+                viewDef.overrides.buttonHint,
+            buttonTitleDefault: queryButtonTitle(localeDefaults) ||
+                viewDef.defaults.buttonHint ||
+                queryButtonTitle(BASE_OPTION_DEFAULTS),
+            // will eventually fall back to buttonText
+        };
+    }
+    // hack to get memoization working
+    let durationInputMap = {};
+    function createDurationCached(durationInput) {
+        let json = JSON.stringify(durationInput);
+        let res = durationInputMap[json];
+        if (res === undefined) {
+            res = createDuration(durationInput);
+            durationInputMap[json] = res;
+        }
+        return res;
+    }
+
+    function reduceViewType(viewType, action) {
+        switch (action.type) {
+            case 'CHANGE_VIEW_TYPE':
+                viewType = action.viewType;
+        }
+        return viewType;
+    }
+
+    function reduceCurrentDate(currentDate, action) {
+        switch (action.type) {
+            case 'CHANGE_DATE':
+                return action.dateMarker;
+            default:
+                return currentDate;
+        }
+    }
+    // should be initialized once and stay constant
+    // this will change too
+    function getInitialDate(options, dateEnv, nowManager) {
+        let initialDateInput = options.initialDate;
+        // compute the initial ambig-timezone date
+        if (initialDateInput != null) {
+            return dateEnv.createMarker(initialDateInput);
+        }
+        return nowManager.getDateMarker();
+    }
+
+    function reduceDynamicOptionOverrides(dynamicOptionOverrides, action) {
+        switch (action.type) {
+            case 'SET_OPTION':
+                return Object.assign(Object.assign({}, dynamicOptionOverrides), { [action.optionName]: action.rawOptionValue });
+            default:
+                return dynamicOptionOverrides;
+        }
+    }
+
+    function reduceDateProfile(currentDateProfile, action, currentDate, dateProfileGenerator) {
+        let dp;
+        switch (action.type) {
+            case 'CHANGE_VIEW_TYPE':
+                return dateProfileGenerator.build(action.dateMarker || currentDate);
+            case 'CHANGE_DATE':
+                return dateProfileGenerator.build(action.dateMarker);
+            case 'PREV':
+                dp = dateProfileGenerator.buildPrev(currentDateProfile, currentDate);
+                if (dp.isValid) {
+                    return dp;
+                }
+                break;
+            case 'NEXT':
+                dp = dateProfileGenerator.buildNext(currentDateProfile, currentDate);
+                if (dp.isValid) {
+                    return dp;
+                }
+                break;
+        }
+        return currentDateProfile;
+    }
+
+    function initEventSources(calendarOptions, dateProfile, context) {
+        let activeRange = dateProfile ? dateProfile.activeRange : null;
+        return addSources({}, parseInitialSources(calendarOptions, context), activeRange, context);
+    }
+    function reduceEventSources(eventSources, action, dateProfile, context) {
+        let activeRange = dateProfile ? dateProfile.activeRange : null; // need this check?
+        switch (action.type) {
+            case 'ADD_EVENT_SOURCES': // already parsed
+                return addSources(eventSources, action.sources, activeRange, context);
+            case 'REMOVE_EVENT_SOURCE':
+                return removeSource(eventSources, action.sourceId);
+            case 'PREV': // TODO: how do we track all actions that affect dateProfile :(
+            case 'NEXT':
+            case 'CHANGE_DATE':
+            case 'CHANGE_VIEW_TYPE':
+                if (dateProfile) {
+                    return fetchDirtySources(eventSources, activeRange, context);
+                }
+                return eventSources;
+            case 'FETCH_EVENT_SOURCES':
+                return fetchSourcesByIds(eventSources, action.sourceIds ? // why no type?
+                    arrayToHash(action.sourceIds) :
+                    excludeStaticSources(eventSources, context), activeRange, action.isRefetch || false, context);
+            case 'RECEIVE_EVENTS':
+            case 'RECEIVE_EVENT_ERROR':
+                return receiveResponse(eventSources, action.sourceId, action.fetchId, action.fetchRange);
+            case 'REMOVE_ALL_EVENT_SOURCES':
+                return {};
+            default:
+                return eventSources;
+        }
+    }
+    function reduceEventSourcesNewTimeZone(eventSources, dateProfile, context) {
+        let activeRange = dateProfile ? dateProfile.activeRange : null; // need this check?
+        return fetchSourcesByIds(eventSources, excludeStaticSources(eventSources, context), activeRange, true, context);
+    }
+    function computeEventSourcesLoading(eventSources) {
+        for (let sourceId in eventSources) {
+            if (eventSources[sourceId].isFetching) {
+                return true;
+            }
+        }
+        return false;
+    }
+    function addSources(eventSourceHash, sources, fetchRange, context) {
+        let hash = {};
+        for (let source of sources) {
+            hash[source.sourceId] = source;
+        }
+        if (fetchRange) {
+            hash = fetchDirtySources(hash, fetchRange, context);
+        }
+        return Object.assign(Object.assign({}, eventSourceHash), hash);
+    }
+    function removeSource(eventSourceHash, sourceId) {
+        return filterHash(eventSourceHash, (eventSource) => eventSource.sourceId !== sourceId);
+    }
+    function fetchDirtySources(sourceHash, fetchRange, context) {
+        return fetchSourcesByIds(sourceHash, filterHash(sourceHash, (eventSource) => isSourceDirty(eventSource, fetchRange, context)), fetchRange, false, context);
+    }
+    function isSourceDirty(eventSource, fetchRange, context) {
+        if (!doesSourceNeedRange(eventSource, context)) {
+            return !eventSource.latestFetchId;
+        }
+        return !context.options.lazyFetching ||
+            !eventSource.fetchRange ||
+            eventSource.isFetching || // always cancel outdated in-progress fetches
+            fetchRange.start < eventSource.fetchRange.start ||
+            fetchRange.end > eventSource.fetchRange.end;
+    }
+    function fetchSourcesByIds(prevSources, sourceIdHash, fetchRange, isRefetch, context) {
+        let nextSources = {};
+        for (let sourceId in prevSources) {
+            let source = prevSources[sourceId];
+            if (sourceIdHash[sourceId]) {
+                nextSources[sourceId] = fetchSource(source, fetchRange, isRefetch, context);
+            }
+            else {
+                nextSources[sourceId] = source;
+            }
+        }
+        return nextSources;
+    }
+    function fetchSource(eventSource, fetchRange, isRefetch, context) {
+        let { options, calendarApi } = context;
+        let sourceDef = context.pluginHooks.eventSourceDefs[eventSource.sourceDefId];
+        let fetchId = guid();
+        sourceDef.fetch({
+            eventSource,
+            range: fetchRange,
+            isRefetch,
+            context,
+        }, (res) => {
+            let { rawEvents } = res;
+            if (options.eventSourceSuccess) {
+                rawEvents = options.eventSourceSuccess.call(calendarApi, rawEvents, res.response) || rawEvents;
+            }
+            if (eventSource.success) {
+                rawEvents = eventSource.success.call(calendarApi, rawEvents, res.response) || rawEvents;
+            }
+            context.dispatch({
+                type: 'RECEIVE_EVENTS',
+                sourceId: eventSource.sourceId,
+                fetchId,
+                fetchRange,
+                rawEvents,
+            });
+        }, (error) => {
+            let errorHandled = false;
+            if (options.eventSourceFailure) {
+                options.eventSourceFailure.call(calendarApi, error);
+                errorHandled = true;
+            }
+            if (eventSource.failure) {
+                eventSource.failure(error);
+                errorHandled = true;
+            }
+            if (!errorHandled) {
+                console.warn(error.message, error);
+            }
+            context.dispatch({
+                type: 'RECEIVE_EVENT_ERROR',
+                sourceId: eventSource.sourceId,
+                fetchId,
+                fetchRange,
+                error,
+            });
+        });
+        return Object.assign(Object.assign({}, eventSource), { isFetching: true, latestFetchId: fetchId });
+    }
+    function receiveResponse(sourceHash, sourceId, fetchId, fetchRange) {
+        let eventSource = sourceHash[sourceId];
+        if (eventSource && // not already removed
+            fetchId === eventSource.latestFetchId) {
+            return Object.assign(Object.assign({}, sourceHash), { [sourceId]: Object.assign(Object.assign({}, eventSource), { isFetching: false, fetchRange }) });
+        }
+        return sourceHash;
+    }
+    function excludeStaticSources(eventSources, context) {
+        return filterHash(eventSources, (eventSource) => doesSourceNeedRange(eventSource, context));
+    }
+    function parseInitialSources(rawOptions, context) {
+        let refiners = buildEventSourceRefiners(context);
+        let rawSources = [].concat(rawOptions.eventSources || []);
+        let sources = []; // parsed
+        if (rawOptions.initialEvents) {
+            rawSources.unshift(rawOptions.initialEvents);
+        }
+        if (rawOptions.events) {
+            rawSources.unshift(rawOptions.events);
+        }
+        for (let rawSource of rawSources) {
+            let source = parseEventSource(rawSource, context, refiners);
+            if (source) {
+                sources.push(source);
+            }
+        }
+        return sources;
+    }
+    function doesSourceNeedRange(eventSource, context) {
+        let defs = context.pluginHooks.eventSourceDefs;
+        return !defs[eventSource.sourceDefId].ignoreRange;
+    }
+
+    function reduceDateSelection(currentSelection, action) {
+        switch (action.type) {
+            case 'UNSELECT_DATES':
+                return null;
+            case 'SELECT_DATES':
+                return action.selection;
+            default:
+                return currentSelection;
+        }
+    }
+
+    function reduceSelectedEvent(currentInstanceId, action) {
+        switch (action.type) {
+            case 'UNSELECT_EVENT':
+                return '';
+            case 'SELECT_EVENT':
+                return action.eventInstanceId;
+            default:
+                return currentInstanceId;
+        }
+    }
+
+    function reduceEventDrag(currentDrag, action) {
+        let newDrag;
+        switch (action.type) {
+            case 'UNSET_EVENT_DRAG':
+                return null;
+            case 'SET_EVENT_DRAG':
+                newDrag = action.state;
+                return {
+                    affectedEvents: newDrag.affectedEvents,
+                    mutatedEvents: newDrag.mutatedEvents,
+                    isEvent: newDrag.isEvent,
+                };
+            default:
+                return currentDrag;
+        }
+    }
+
+    function reduceEventResize(currentResize, action) {
+        let newResize;
+        switch (action.type) {
+            case 'UNSET_EVENT_RESIZE':
+                return null;
+            case 'SET_EVENT_RESIZE':
+                newResize = action.state;
+                return {
+                    affectedEvents: newResize.affectedEvents,
+                    mutatedEvents: newResize.mutatedEvents,
+                    isEvent: newResize.isEvent,
+                };
+            default:
+                return currentResize;
+        }
+    }
+
+    function parseToolbars(calendarOptions, calendarOptionOverrides, theme, viewSpecs, calendarApi) {
+        let header = calendarOptions.headerToolbar ? parseToolbar(calendarOptions.headerToolbar, calendarOptions, calendarOptionOverrides, theme, viewSpecs, calendarApi) : null;
+        let footer = calendarOptions.footerToolbar ? parseToolbar(calendarOptions.footerToolbar, calendarOptions, calendarOptionOverrides, theme, viewSpecs, calendarApi) : null;
+        return { header, footer };
+    }
+    function parseToolbar(sectionStrHash, calendarOptions, calendarOptionOverrides, theme, viewSpecs, calendarApi) {
+        let sectionWidgets = {};
+        let viewsWithButtons = [];
+        let hasTitle = false;
+        for (let sectionName in sectionStrHash) {
+            let sectionStr = sectionStrHash[sectionName];
+            let sectionRes = parseSection(sectionStr, calendarOptions, calendarOptionOverrides, theme, viewSpecs, calendarApi);
+            sectionWidgets[sectionName] = sectionRes.widgets;
+            viewsWithButtons.push(...sectionRes.viewsWithButtons);
+            hasTitle = hasTitle || sectionRes.hasTitle;
+        }
+        return { sectionWidgets, viewsWithButtons, hasTitle };
+    }
+    /*
+    BAD: querying icons and text here. should be done at render time
+    */
+    function parseSection(sectionStr, calendarOptions, // defaults+overrides, then refined
+    calendarOptionOverrides, // overrides only!, unrefined :(
+    theme, viewSpecs, calendarApi) {
+        let isRtl = calendarOptions.direction === 'rtl';
+        let calendarCustomButtons = calendarOptions.customButtons || {};
+        let calendarButtonTextOverrides = calendarOptionOverrides.buttonText || {};
+        let calendarButtonText = calendarOptions.buttonText || {};
+        let calendarButtonHintOverrides = calendarOptionOverrides.buttonHints || {};
+        let calendarButtonHints = calendarOptions.buttonHints || {};
+        let sectionSubstrs = sectionStr ? sectionStr.split(' ') : [];
+        let viewsWithButtons = [];
+        let hasTitle = false;
+        let widgets = sectionSubstrs.map((buttonGroupStr) => (buttonGroupStr.split(',').map((buttonName) => {
+            if (buttonName === 'title') {
+                hasTitle = true;
+                return { buttonName };
+            }
+            let customButtonProps;
+            let viewSpec;
+            let buttonClick;
+            let buttonIcon; // only one of these will be set
+            let buttonText; // "
+            let buttonHint;
+            // ^ for the title="" attribute, for accessibility
+            if ((customButtonProps = calendarCustomButtons[buttonName])) {
+                buttonClick = (ev) => {
+                    if (customButtonProps.click) {
+                        customButtonProps.click.call(ev.target, ev, ev.target); // TODO: use Calendar this context?
+                    }
+                };
+                (buttonIcon = theme.getCustomButtonIconClass(customButtonProps)) ||
+                    (buttonIcon = theme.getIconClass(buttonName, isRtl)) ||
+                    (buttonText = customButtonProps.text);
+                buttonHint = customButtonProps.hint || customButtonProps.text;
+            }
+            else if ((viewSpec = viewSpecs[buttonName])) {
+                viewsWithButtons.push(buttonName);
+                buttonClick = () => {
+                    calendarApi.changeView(buttonName);
+                };
+                (buttonText = viewSpec.buttonTextOverride) ||
+                    (buttonIcon = theme.getIconClass(buttonName, isRtl)) ||
+                    (buttonText = viewSpec.buttonTextDefault);
+                let textFallback = viewSpec.buttonTextOverride ||
+                    viewSpec.buttonTextDefault;
+                buttonHint = formatWithOrdinals(viewSpec.buttonTitleOverride ||
+                    viewSpec.buttonTitleDefault ||
+                    calendarOptions.viewHint, [textFallback, buttonName], // view-name = buttonName
+                textFallback);
+            }
+            else if (calendarApi[buttonName]) { // a calendarApi method
+                buttonClick = () => {
+                    calendarApi[buttonName]();
+                };
+                (buttonText = calendarButtonTextOverrides[buttonName]) ||
+                    (buttonIcon = theme.getIconClass(buttonName, isRtl)) ||
+                    (buttonText = calendarButtonText[buttonName]); // everything else is considered default
+                if (buttonName === 'prevYear' || buttonName === 'nextYear') {
+                    let prevOrNext = buttonName === 'prevYear' ? 'prev' : 'next';
+                    buttonHint = formatWithOrdinals(calendarButtonHintOverrides[prevOrNext] ||
+                        calendarButtonHints[prevOrNext], [
+                        calendarButtonText.year || 'year',
+                        'year',
+                    ], calendarButtonText[buttonName]);
+                }
+                else {
+                    buttonHint = (navUnit) => formatWithOrdinals(calendarButtonHintOverrides[buttonName] ||
+                        calendarButtonHints[buttonName], [
+                        calendarButtonText[navUnit] || navUnit,
+                        navUnit,
+                    ], calendarButtonText[buttonName]);
+                }
+            }
+            return { buttonName, buttonClick, buttonIcon, buttonText, buttonHint };
+        })));
+        return { widgets, viewsWithButtons, hasTitle };
+    }
+
+    // always represents the current view. otherwise, it'd need to change value every time date changes
+    class ViewImpl {
+        constructor(type, getCurrentData, dateEnv) {
+            this.type = type;
+            this.getCurrentData = getCurrentData;
+            this.dateEnv = dateEnv;
+        }
+        get calendar() {
+            return this.getCurrentData().calendarApi;
+        }
+        get title() {
+            return this.getCurrentData().viewTitle;
+        }
+        get activeStart() {
+            return this.dateEnv.toDate(this.getCurrentData().dateProfile.activeRange.start);
+        }
+        get activeEnd() {
+            return this.dateEnv.toDate(this.getCurrentData().dateProfile.activeRange.end);
+        }
+        get currentStart() {
+            return this.dateEnv.toDate(this.getCurrentData().dateProfile.currentRange.start);
+        }
+        get currentEnd() {
+            return this.dateEnv.toDate(this.getCurrentData().dateProfile.currentRange.end);
+        }
+        getOption(name) {
+            return this.getCurrentData().options[name]; // are the view-specific options
+        }
+    }
+
+    let eventSourceDef$2 = {
+        ignoreRange: true,
+        parseMeta(refined) {
+            if (Array.isArray(refined.events)) {
+                return refined.events;
+            }
+            return null;
+        },
+        fetch(arg, successCallback) {
+            successCallback({
+                rawEvents: arg.eventSource.meta,
+            });
+        },
+    };
+    const arrayEventSourcePlugin = createPlugin({
+        name: 'array-event-source',
+        eventSourceDefs: [eventSourceDef$2],
+    });
+
+    let eventSourceDef$1 = {
+        parseMeta(refined) {
+            if (typeof refined.events === 'function') {
+                return refined.events;
+            }
+            return null;
+        },
+        fetch(arg, successCallback, errorCallback) {
+            const { dateEnv } = arg.context;
+            const func = arg.eventSource.meta;
+            unpromisify(func.bind(null, buildRangeApiWithTimeZone(arg.range, dateEnv)), (rawEvents) => successCallback({ rawEvents }), errorCallback);
+        },
+    };
+    const funcEventSourcePlugin = createPlugin({
+        name: 'func-event-source',
+        eventSourceDefs: [eventSourceDef$1],
+    });
+
+    const JSON_FEED_EVENT_SOURCE_REFINERS = {
+        method: String,
+        extraParams: identity,
+        startParam: String,
+        endParam: String,
+        timeZoneParam: String,
+    };
+
+    let eventSourceDef = {
+        parseMeta(refined) {
+            if (refined.url && (refined.format === 'json' || !refined.format)) {
+                return {
+                    url: refined.url,
+                    format: 'json',
+                    method: (refined.method || 'GET').toUpperCase(),
+                    extraParams: refined.extraParams,
+                    startParam: refined.startParam,
+                    endParam: refined.endParam,
+                    timeZoneParam: refined.timeZoneParam,
+                };
+            }
+            return null;
+        },
+        fetch(arg, successCallback, errorCallback) {
+            const { meta } = arg.eventSource;
+            const requestParams = buildRequestParams(meta, arg.range, arg.context);
+            requestJson(meta.method, meta.url, requestParams).then(([rawEvents, response]) => {
+                successCallback({ rawEvents, response });
+            }, errorCallback);
+        },
+    };
+    const jsonFeedEventSourcePlugin = createPlugin({
+        name: 'json-event-source',
+        eventSourceRefiners: JSON_FEED_EVENT_SOURCE_REFINERS,
+        eventSourceDefs: [eventSourceDef],
+    });
+    function buildRequestParams(meta, range, context) {
+        let { dateEnv, options } = context;
+        let startParam;
+        let endParam;
+        let timeZoneParam;
+        let customRequestParams;
+        let params = {};
+        startParam = meta.startParam;
+        if (startParam == null) {
+            startParam = options.startParam;
+        }
+        endParam = meta.endParam;
+        if (endParam == null) {
+            endParam = options.endParam;
+        }
+        timeZoneParam = meta.timeZoneParam;
+        if (timeZoneParam == null) {
+            timeZoneParam = options.timeZoneParam;
+        }
+        // retrieve any outbound GET/POST data from the options
+        if (typeof meta.extraParams === 'function') {
+            // supplied as a function that returns a key/value object
+            customRequestParams = meta.extraParams();
+        }
+        else {
+            // probably supplied as a straight key/value object
+            customRequestParams = meta.extraParams || {};
+        }
+        Object.assign(params, customRequestParams);
+        params[startParam] = dateEnv.formatIso(range.start);
+        params[endParam] = dateEnv.formatIso(range.end);
+        if (dateEnv.timeZone !== 'local') {
+            params[timeZoneParam] = dateEnv.timeZone;
+        }
+        return params;
+    }
+
+    const SIMPLE_RECURRING_REFINERS = {
+        daysOfWeek: identity,
+        startTime: createDuration,
+        endTime: createDuration,
+        duration: createDuration,
+        startRecur: identity,
+        endRecur: identity,
+    };
+
+    let recurring = {
+        parse(refined, dateEnv) {
+            if (refined.daysOfWeek || refined.startTime || refined.endTime || refined.startRecur || refined.endRecur) {
+                let recurringData = {
+                    daysOfWeek: refined.daysOfWeek || null,
+                    startTime: refined.startTime || null,
+                    endTime: refined.endTime || null,
+                    startRecur: refined.startRecur ? dateEnv.createMarker(refined.startRecur) : null,
+                    endRecur: refined.endRecur ? dateEnv.createMarker(refined.endRecur) : null,
+                    dateEnv,
+                };
+                let duration;
+                if (refined.duration) {
+                    duration = refined.duration;
+                }
+                if (!duration && refined.startTime && refined.endTime) {
+                    duration = subtractDurations(refined.endTime, refined.startTime);
+                }
+                return {
+                    allDayGuess: Boolean(!refined.startTime && !refined.endTime),
+                    duration,
+                    typeData: recurringData, // doesn't need endTime anymore but oh well
+                };
+            }
+            return null;
+        },
+        expand(typeData, framingRange, dateEnv) {
+            let clippedFramingRange = intersectRanges(framingRange, { start: typeData.startRecur, end: typeData.endRecur });
+            if (clippedFramingRange) {
+                return expandRanges(typeData.daysOfWeek, typeData.startTime, typeData.dateEnv, dateEnv, clippedFramingRange);
+            }
+            return [];
+        },
+    };
+    const simpleRecurringEventsPlugin = createPlugin({
+        name: 'simple-recurring-event',
+        recurringTypes: [recurring],
+        eventRefiners: SIMPLE_RECURRING_REFINERS,
+    });
+    function expandRanges(daysOfWeek, startTime, eventDateEnv, calendarDateEnv, framingRange) {
+        let dowHash = daysOfWeek ? arrayToHash(daysOfWeek) : null;
+        let dayMarker = startOfDay(framingRange.start);
+        let endMarker = framingRange.end;
+        let instanceStarts = [];
+        while (dayMarker < endMarker) {
+            let instanceStart;
+            // if everyday, or this particular day-of-week
+            if (!dowHash || dowHash[dayMarker.getUTCDay()]) {
+                if (startTime) {
+                    instanceStart = calendarDateEnv.add(dayMarker, startTime);
+                }
+                else {
+                    instanceStart = dayMarker;
+                }
+                instanceStarts.push(calendarDateEnv.createMarker(eventDateEnv.toDate(instanceStart)));
+            }
+            dayMarker = addDays(dayMarker, 1);
+        }
+        return instanceStarts;
+    }
+
+    const changeHandlerPlugin = createPlugin({
+        name: 'change-handler',
+        optionChangeHandlers: {
+            events(events, context) {
+                handleEventSources([events], context);
+            },
+            eventSources: handleEventSources,
+        },
+    });
+    /*
+    BUG: if `event` was supplied, all previously-given `eventSources` will be wiped out
+    */
+    function handleEventSources(inputs, context) {
+        let unfoundSources = hashValuesToArray(context.getCurrentData().eventSources);
+        if (unfoundSources.length === 1 &&
+            inputs.length === 1 &&
+            Array.isArray(unfoundSources[0]._raw) &&
+            Array.isArray(inputs[0])) {
+            context.dispatch({
+                type: 'RESET_RAW_EVENTS',
+                sourceId: unfoundSources[0].sourceId,
+                rawEvents: inputs[0],
+            });
+            return;
+        }
+        let newInputs = [];
+        for (let input of inputs) {
+            let inputFound = false;
+            for (let i = 0; i < unfoundSources.length; i += 1) {
+                if (unfoundSources[i]._raw === input) {
+                    unfoundSources.splice(i, 1); // delete
+                    inputFound = true;
+                    break;
+                }
+            }
+            if (!inputFound) {
+                newInputs.push(input);
+            }
+        }
+        for (let unfoundSource of unfoundSources) {
+            context.dispatch({
+                type: 'REMOVE_EVENT_SOURCE',
+                sourceId: unfoundSource.sourceId,
+            });
+        }
+        for (let newInput of newInputs) {
+            context.calendarApi.addEventSource(newInput);
+        }
+    }
+
+    function handleDateProfile(dateProfile, context) {
+        context.emitter.trigger('datesSet', Object.assign(Object.assign({}, buildRangeApiWithTimeZone(dateProfile.activeRange, context.dateEnv)), { view: context.viewApi }));
+    }
+
+    function handleEventStore(eventStore, context) {
+        let { emitter } = context;
+        if (emitter.hasHandlers('eventsSet')) {
+            emitter.trigger('eventsSet', buildEventApis(eventStore, context));
+        }
+    }
+
+    /*
+    this array is exposed on the root namespace so that UMD plugins can add to it.
+    see the rollup-bundles script.
+    */
+    const globalPlugins = [
+        arrayEventSourcePlugin,
+        funcEventSourcePlugin,
+        jsonFeedEventSourcePlugin,
+        simpleRecurringEventsPlugin,
+        changeHandlerPlugin,
+        createPlugin({
+            name: 'misc',
+            isLoadingFuncs: [
+                (state) => computeEventSourcesLoading(state.eventSources),
+            ],
+            propSetHandlers: {
+                dateProfile: handleDateProfile,
+                eventStore: handleEventStore,
+            },
+        }),
+    ];
+
+    class TaskRunner {
+        constructor(runTaskOption, drainedOption) {
+            this.runTaskOption = runTaskOption;
+            this.drainedOption = drainedOption;
+            this.queue = [];
+            this.delayedRunner = new DelayedRunner(this.drain.bind(this));
+        }
+        request(task, delay) {
+            this.queue.push(task);
+            this.delayedRunner.request(delay);
+        }
+        pause(scope) {
+            this.delayedRunner.pause(scope);
+        }
+        resume(scope, force) {
+            this.delayedRunner.resume(scope, force);
+        }
+        drain() {
+            let { queue } = this;
+            while (queue.length) {
+                let completedTasks = [];
+                let task;
+                while ((task = queue.shift())) {
+                    this.runTask(task);
+                    completedTasks.push(task);
+                }
+                this.drained(completedTasks);
+            } // keep going, in case new tasks were added in the drained handler
+        }
+        runTask(task) {
+            if (this.runTaskOption) {
+                this.runTaskOption(task);
+            }
+        }
+        drained(completedTasks) {
+            if (this.drainedOption) {
+                this.drainedOption(completedTasks);
+            }
+        }
+    }
+
+    // Computes what the title at the top of the calendarApi should be for this view
+    function buildTitle(dateProfile, viewOptions, dateEnv) {
+        let range;
+        // for views that span a large unit of time, show the proper interval, ignoring stray days before and after
+        if (/^(year|month)$/.test(dateProfile.currentRangeUnit)) {
+            range = dateProfile.currentRange;
+        }
+        else { // for day units or smaller, use the actual day range
+            range = dateProfile.activeRange;
+        }
+        return dateEnv.formatRange(range.start, range.end, createFormatter(viewOptions.titleFormat || buildTitleFormat(dateProfile)), {
+            isEndExclusive: dateProfile.isRangeAllDay,
+            defaultSeparator: viewOptions.titleRangeSeparator,
+        });
+    }
+    // Generates the format string that should be used to generate the title for the current date range.
+    // Attempts to compute the most appropriate format if not explicitly specified with `titleFormat`.
+    function buildTitleFormat(dateProfile) {
+        let { currentRangeUnit } = dateProfile;
+        if (currentRangeUnit === 'year') {
+            return { year: 'numeric' };
+        }
+        if (currentRangeUnit === 'month') {
+            return { year: 'numeric', month: 'long' }; // like "September 2014"
+        }
+        let days = diffWholeDays(dateProfile.currentRange.start, dateProfile.currentRange.end);
+        if (days !== null && days > 1) {
+            // multi-day range. shorter, like "Sep 9 - 10 2014"
+            return { year: 'numeric', month: 'short', day: 'numeric' };
+        }
+        // one day. longer, like "September 9 2014"
+        return { year: 'numeric', month: 'long', day: 'numeric' };
+    }
+
+    /*
+    TODO: test switching timezones when NO timezone plugin
+    */
+    class CalendarNowManager {
+        constructor() {
+            this.resetListeners = new Set();
+        }
+        handleInput(dateEnv, // will change if timezone setup changed
+        nowInput) {
+            const oldDateEnv = this.dateEnv;
+            if (dateEnv !== oldDateEnv) {
+                if (typeof nowInput === 'function') {
+                    this.nowFn = nowInput;
+                }
+                else if (!oldDateEnv) { // first time?
+                    this.nowAnchorDate = dateEnv.toDate(nowInput
+                        ? dateEnv.createMarker(nowInput)
+                        : dateEnv.createNowMarker());
+                    this.nowAnchorQueried = Date.now();
+                }
+                this.dateEnv = dateEnv;
+                // not first time? fire reset handlers
+                if (oldDateEnv) {
+                    for (const resetListener of this.resetListeners.values()) {
+                        resetListener();
+                    }
+                }
+            }
+        }
+        getDateMarker() {
+            return this.nowAnchorDate
+                ? this.dateEnv.timestampToMarker(this.nowAnchorDate.valueOf() +
+                    (Date.now() - this.nowAnchorQueried))
+                : this.dateEnv.createMarker(this.nowFn());
+        }
+        addResetListener(handler) {
+            this.resetListeners.add(handler);
+        }
+        removeResetListener(handler) {
+            this.resetListeners.delete(handler);
+        }
+    }
+
+    // in future refactor, do the redux-style function(state=initial) for initial-state
+    // also, whatever is happening in constructor, have it happen in action queue too
+    class CalendarDataManager {
+        constructor(props) {
+            this.computeCurrentViewData = memoize(this._computeCurrentViewData);
+            this.organizeRawLocales = memoize(organizeRawLocales);
+            this.buildLocale = memoize(buildLocale);
+            this.buildPluginHooks = buildBuildPluginHooks();
+            this.buildDateEnv = memoize(buildDateEnv$1);
+            this.buildTheme = memoize(buildTheme);
+            this.parseToolbars = memoize(parseToolbars);
+            this.buildViewSpecs = memoize(buildViewSpecs);
+            this.buildDateProfileGenerator = memoizeObjArg(buildDateProfileGenerator);
+            this.buildViewApi = memoize(buildViewApi);
+            this.buildViewUiProps = memoizeObjArg(buildViewUiProps);
+            this.buildEventUiBySource = memoize(buildEventUiBySource, isPropsEqual);
+            this.buildEventUiBases = memoize(buildEventUiBases);
+            this.parseContextBusinessHours = memoizeObjArg(parseContextBusinessHours);
+            this.buildTitle = memoize(buildTitle);
+            this.nowManager = new CalendarNowManager();
+            this.emitter = new Emitter();
+            this.actionRunner = new TaskRunner(this._handleAction.bind(this), this.updateData.bind(this));
+            this.currentCalendarOptionsInput = {};
+            this.currentCalendarOptionsRefined = {};
+            this.currentViewOptionsInput = {};
+            this.currentViewOptionsRefined = {};
+            this.currentCalendarOptionsRefiners = {};
+            this.optionsForRefining = [];
+            this.optionsForHandling = [];
+            this.getCurrentData = () => this.data;
+            this.dispatch = (action) => {
+                this.actionRunner.request(action); // protects against recursive calls to _handleAction
+            };
+            this.props = props;
+            this.actionRunner.pause();
+            this.nowManager = new CalendarNowManager();
+            let dynamicOptionOverrides = {};
+            let optionsData = this.computeOptionsData(props.optionOverrides, dynamicOptionOverrides, props.calendarApi);
+            let currentViewType = optionsData.calendarOptions.initialView || optionsData.pluginHooks.initialView;
+            let currentViewData = this.computeCurrentViewData(currentViewType, optionsData, props.optionOverrides, dynamicOptionOverrides);
+            // wire things up
+            // TODO: not DRY
+            props.calendarApi.currentDataManager = this;
+            this.emitter.setThisContext(props.calendarApi);
+            this.emitter.setOptions(currentViewData.options);
+            let calendarContext = {
+                nowManager: this.nowManager,
+                dateEnv: optionsData.dateEnv,
+                options: optionsData.calendarOptions,
+                pluginHooks: optionsData.pluginHooks,
+                calendarApi: props.calendarApi,
+                dispatch: this.dispatch,
+                emitter: this.emitter,
+                getCurrentData: this.getCurrentData,
+            };
+            let currentDate = getInitialDate(optionsData.calendarOptions, optionsData.dateEnv, this.nowManager);
+            let dateProfile = currentViewData.dateProfileGenerator.build(currentDate);
+            if (!rangeContainsMarker(dateProfile.activeRange, currentDate)) {
+                currentDate = dateProfile.currentRange.start;
+            }
+            // needs to be after setThisContext
+            for (let callback of optionsData.pluginHooks.contextInit) {
+                callback(calendarContext);
+            }
+            // NOT DRY
+            let eventSources = initEventSources(optionsData.calendarOptions, dateProfile, calendarContext);
+            let initialState = {
+                dynamicOptionOverrides,
+                currentViewType,
+                currentDate,
+                dateProfile,
+                businessHours: this.parseContextBusinessHours(calendarContext),
+                eventSources,
+                eventUiBases: {},
+                eventStore: createEmptyEventStore(),
+                renderableEventStore: createEmptyEventStore(),
+                dateSelection: null,
+                eventSelection: '',
+                eventDrag: null,
+                eventResize: null,
+                selectionConfig: this.buildViewUiProps(calendarContext).selectionConfig,
+            };
+            let contextAndState = Object.assign(Object.assign({}, calendarContext), initialState);
+            for (let reducer of optionsData.pluginHooks.reducers) {
+                Object.assign(initialState, reducer(null, null, contextAndState));
+            }
+            if (computeIsLoading(initialState, calendarContext)) {
+                this.emitter.trigger('loading', true); // NOT DRY
+            }
+            this.state = initialState;
+            this.updateData();
+            this.actionRunner.resume();
+        }
+        resetOptions(optionOverrides, changedOptionNames) {
+            let { props } = this;
+            if (changedOptionNames === undefined) {
+                props.optionOverrides = optionOverrides;
+            }
+            else {
+                props.optionOverrides = Object.assign(Object.assign({}, (props.optionOverrides || {})), optionOverrides);
+                this.optionsForRefining.push(...changedOptionNames);
+            }
+            if (changedOptionNames === undefined || changedOptionNames.length) {
+                this.actionRunner.request({
+                    type: 'NOTHING',
+                });
+            }
+        }
+        _handleAction(action) {
+            let { props, state, emitter } = this;
+            let dynamicOptionOverrides = reduceDynamicOptionOverrides(state.dynamicOptionOverrides, action);
+            let optionsData = this.computeOptionsData(props.optionOverrides, dynamicOptionOverrides, props.calendarApi);
+            let currentViewType = reduceViewType(state.currentViewType, action);
+            let currentViewData = this.computeCurrentViewData(currentViewType, optionsData, props.optionOverrides, dynamicOptionOverrides);
+            // wire things up
+            // TODO: not DRY
+            props.calendarApi.currentDataManager = this;
+            emitter.setThisContext(props.calendarApi);
+            emitter.setOptions(currentViewData.options);
+            let calendarContext = {
+                nowManager: this.nowManager,
+                dateEnv: optionsData.dateEnv,
+                options: optionsData.calendarOptions,
+                pluginHooks: optionsData.pluginHooks,
+                calendarApi: props.calendarApi,
+                dispatch: this.dispatch,
+                emitter,
+                getCurrentData: this.getCurrentData,
+            };
+            let { currentDate, dateProfile } = state;
+            if (this.data && this.data.dateProfileGenerator !== currentViewData.dateProfileGenerator) { // hack
+                dateProfile = currentViewData.dateProfileGenerator.build(currentDate);
+            }
+            currentDate = reduceCurrentDate(currentDate, action);
+            dateProfile = reduceDateProfile(dateProfile, action, currentDate, currentViewData.dateProfileGenerator);
+            if (action.type === 'PREV' || // TODO: move this logic into DateProfileGenerator
+                action.type === 'NEXT' || // "
+                !rangeContainsMarker(dateProfile.currentRange, currentDate)) {
+                currentDate = dateProfile.currentRange.start;
+            }
+            let eventSources = reduceEventSources(state.eventSources, action, dateProfile, calendarContext);
+            let eventStore = reduceEventStore(state.eventStore, action, eventSources, dateProfile, calendarContext);
+            let isEventsLoading = computeEventSourcesLoading(eventSources); // BAD. also called in this func in computeIsLoading
+            let renderableEventStore = (isEventsLoading && !currentViewData.options.progressiveEventRendering) ?
+                (state.renderableEventStore || eventStore) : // try from previous state
+                eventStore;
+            let { eventUiSingleBase, selectionConfig } = this.buildViewUiProps(calendarContext); // will memoize obj
+            let eventUiBySource = this.buildEventUiBySource(eventSources);
+            let eventUiBases = this.buildEventUiBases(renderableEventStore.defs, eventUiSingleBase, eventUiBySource);
+            let newState = {
+                dynamicOptionOverrides,
+                currentViewType,
+                currentDate,
+                dateProfile,
+                eventSources,
+                eventStore,
+                renderableEventStore,
+                selectionConfig,
+                eventUiBases,
+                businessHours: this.parseContextBusinessHours(calendarContext),
+                dateSelection: reduceDateSelection(state.dateSelection, action),
+                eventSelection: reduceSelectedEvent(state.eventSelection, action),
+                eventDrag: reduceEventDrag(state.eventDrag, action),
+                eventResize: reduceEventResize(state.eventResize, action),
+            };
+            let contextAndState = Object.assign(Object.assign({}, calendarContext), newState);
+            for (let reducer of optionsData.pluginHooks.reducers) {
+                Object.assign(newState, reducer(state, action, contextAndState)); // give the OLD state, for old value
+            }
+            let wasLoading = computeIsLoading(state, calendarContext);
+            let isLoading = computeIsLoading(newState, calendarContext);
+            // TODO: use propSetHandlers in plugin system
+            if (!wasLoading && isLoading) {
+                emitter.trigger('loading', true);
+            }
+            else if (wasLoading && !isLoading) {
+                emitter.trigger('loading', false);
+            }
+            this.state = newState;
+            if (props.onAction) {
+                props.onAction(action);
+            }
+        }
+        updateData() {
+            let { props, state } = this;
+            let oldData = this.data;
+            let optionsData = this.computeOptionsData(props.optionOverrides, state.dynamicOptionOverrides, props.calendarApi);
+            let currentViewData = this.computeCurrentViewData(state.currentViewType, optionsData, props.optionOverrides, state.dynamicOptionOverrides);
+            let data = this.data = Object.assign(Object.assign(Object.assign({ nowManager: this.nowManager, viewTitle: this.buildTitle(state.dateProfile, currentViewData.options, optionsData.dateEnv), calendarApi: props.calendarApi, dispatch: this.dispatch, emitter: this.emitter, getCurrentData: this.getCurrentData }, optionsData), currentViewData), state);
+            let changeHandlers = optionsData.pluginHooks.optionChangeHandlers;
+            let oldCalendarOptions = oldData && oldData.calendarOptions;
+            let newCalendarOptions = optionsData.calendarOptions;
+            if (oldCalendarOptions && oldCalendarOptions !== newCalendarOptions) {
+                if (oldCalendarOptions.timeZone !== newCalendarOptions.timeZone) {
+                    // hack
+                    state.eventSources = data.eventSources = reduceEventSourcesNewTimeZone(data.eventSources, state.dateProfile, data);
+                    state.eventStore = data.eventStore = rezoneEventStoreDates(data.eventStore, oldData.dateEnv, data.dateEnv);
+                    state.renderableEventStore = data.renderableEventStore = rezoneEventStoreDates(data.renderableEventStore, oldData.dateEnv, data.dateEnv);
+                }
+                for (let optionName in changeHandlers) {
+                    if (this.optionsForHandling.indexOf(optionName) !== -1 ||
+                        oldCalendarOptions[optionName] !== newCalendarOptions[optionName]) {
+                        changeHandlers[optionName](newCalendarOptions[optionName], data);
+                    }
+                }
+            }
+            this.optionsForHandling = [];
+            if (props.onData) {
+                props.onData(data);
+            }
+        }
+        computeOptionsData(optionOverrides, dynamicOptionOverrides, calendarApi) {
+            // TODO: blacklist options that are handled by optionChangeHandlers
+            if (!this.optionsForRefining.length &&
+                optionOverrides === this.stableOptionOverrides &&
+                dynamicOptionOverrides === this.stableDynamicOptionOverrides) {
+                return this.stableCalendarOptionsData;
+            }
+            let { refinedOptions, pluginHooks, localeDefaults, availableLocaleData, extra, } = this.processRawCalendarOptions(optionOverrides, dynamicOptionOverrides);
+            warnUnknownOptions(extra);
+            let dateEnv = this.buildDateEnv(refinedOptions.timeZone, refinedOptions.locale, refinedOptions.weekNumberCalculation, refinedOptions.firstDay, refinedOptions.weekText, pluginHooks, availableLocaleData, refinedOptions.defaultRangeSeparator);
+            let viewSpecs = this.buildViewSpecs(pluginHooks.views, this.stableOptionOverrides, this.stableDynamicOptionOverrides, localeDefaults);
+            let theme = this.buildTheme(refinedOptions, pluginHooks);
+            let toolbarConfig = this.parseToolbars(refinedOptions, this.stableOptionOverrides, theme, viewSpecs, calendarApi);
+            return this.stableCalendarOptionsData = {
+                calendarOptions: refinedOptions,
+                pluginHooks,
+                dateEnv,
+                viewSpecs,
+                theme,
+                toolbarConfig,
+                localeDefaults,
+                availableRawLocales: availableLocaleData.map,
+            };
+        }
+        // always called from behind a memoizer
+        processRawCalendarOptions(optionOverrides, dynamicOptionOverrides) {
+            let { locales, locale } = mergeRawOptions([
+                BASE_OPTION_DEFAULTS,
+                optionOverrides,
+                dynamicOptionOverrides,
+            ]);
+            let availableLocaleData = this.organizeRawLocales(locales);
+            let availableRawLocales = availableLocaleData.map;
+            let localeDefaults = this.buildLocale(locale || availableLocaleData.defaultCode, availableRawLocales).options;
+            let pluginHooks = this.buildPluginHooks(optionOverrides.plugins || [], globalPlugins);
+            let refiners = this.currentCalendarOptionsRefiners = Object.assign(Object.assign(Object.assign(Object.assign(Object.assign({}, BASE_OPTION_REFINERS), CALENDAR_LISTENER_REFINERS), CALENDAR_OPTION_REFINERS), pluginHooks.listenerRefiners), pluginHooks.optionRefiners);
+            let extra = {};
+            let raw = mergeRawOptions([
+                BASE_OPTION_DEFAULTS,
+                localeDefaults,
+                optionOverrides,
+                dynamicOptionOverrides,
+            ]);
+            let refined = {};
+            let currentRaw = this.currentCalendarOptionsInput;
+            let currentRefined = this.currentCalendarOptionsRefined;
+            let anyChanges = false;
+            for (let optionName in raw) {
+                if (this.optionsForRefining.indexOf(optionName) === -1 && (raw[optionName] === currentRaw[optionName] || (COMPLEX_OPTION_COMPARATORS[optionName] &&
+                    (optionName in currentRaw) &&
+                    COMPLEX_OPTION_COMPARATORS[optionName](currentRaw[optionName], raw[optionName])))) {
+                    refined[optionName] = currentRefined[optionName];
+                }
+                else if (refiners[optionName]) {
+                    refined[optionName] = refiners[optionName](raw[optionName]);
+                    anyChanges = true;
+                }
+                else {
+                    extra[optionName] = currentRaw[optionName];
+                }
+            }
+            if (anyChanges) {
+                this.currentCalendarOptionsInput = raw;
+                this.currentCalendarOptionsRefined = refined;
+                this.stableOptionOverrides = optionOverrides;
+                this.stableDynamicOptionOverrides = dynamicOptionOverrides;
+            }
+            this.optionsForHandling.push(...this.optionsForRefining);
+            this.optionsForRefining = [];
+            return {
+                rawOptions: this.currentCalendarOptionsInput,
+                refinedOptions: this.currentCalendarOptionsRefined,
+                pluginHooks,
+                availableLocaleData,
+                localeDefaults,
+                extra,
+            };
+        }
+        _computeCurrentViewData(viewType, optionsData, optionOverrides, dynamicOptionOverrides) {
+            let viewSpec = optionsData.viewSpecs[viewType];
+            if (!viewSpec) {
+                throw new Error(`viewType "${viewType}" is not available. Please make sure you've loaded all neccessary plugins`);
+            }
+            let { refinedOptions, extra } = this.processRawViewOptions(viewSpec, optionsData.pluginHooks, optionsData.localeDefaults, optionOverrides, dynamicOptionOverrides);
+            warnUnknownOptions(extra);
+            this.nowManager.handleInput(optionsData.dateEnv, refinedOptions.now);
+            let dateProfileGenerator = this.buildDateProfileGenerator({
+                dateProfileGeneratorClass: viewSpec.optionDefaults.dateProfileGeneratorClass,
+                nowManager: this.nowManager,
+                duration: viewSpec.duration,
+                durationUnit: viewSpec.durationUnit,
+                usesMinMaxTime: viewSpec.optionDefaults.usesMinMaxTime,
+                dateEnv: optionsData.dateEnv,
+                calendarApi: this.props.calendarApi,
+                slotMinTime: refinedOptions.slotMinTime,
+                slotMaxTime: refinedOptions.slotMaxTime,
+                showNonCurrentDates: refinedOptions.showNonCurrentDates,
+                dayCount: refinedOptions.dayCount,
+                dateAlignment: refinedOptions.dateAlignment,
+                dateIncrement: refinedOptions.dateIncrement,
+                hiddenDays: refinedOptions.hiddenDays,
+                weekends: refinedOptions.weekends,
+                validRangeInput: refinedOptions.validRange,
+                visibleRangeInput: refinedOptions.visibleRange,
+                fixedWeekCount: refinedOptions.fixedWeekCount,
+            });
+            let viewApi = this.buildViewApi(viewType, this.getCurrentData, optionsData.dateEnv);
+            return { viewSpec, options: refinedOptions, dateProfileGenerator, viewApi };
+        }
+        processRawViewOptions(viewSpec, pluginHooks, localeDefaults, optionOverrides, dynamicOptionOverrides) {
+            let raw = mergeRawOptions([
+                BASE_OPTION_DEFAULTS,
+                viewSpec.optionDefaults,
+                localeDefaults,
+                optionOverrides,
+                viewSpec.optionOverrides,
+                dynamicOptionOverrides,
+            ]);
+            let refiners = Object.assign(Object.assign(Object.assign(Object.assign(Object.assign(Object.assign({}, BASE_OPTION_REFINERS), CALENDAR_LISTENER_REFINERS), CALENDAR_OPTION_REFINERS), VIEW_OPTION_REFINERS), pluginHooks.listenerRefiners), pluginHooks.optionRefiners);
+            let refined = {};
+            let currentRaw = this.currentViewOptionsInput;
+            let currentRefined = this.currentViewOptionsRefined;
+            let anyChanges = false;
+            let extra = {};
+            for (let optionName in raw) {
+                if (raw[optionName] === currentRaw[optionName] ||
+                    (COMPLEX_OPTION_COMPARATORS[optionName] &&
+                        COMPLEX_OPTION_COMPARATORS[optionName](raw[optionName], currentRaw[optionName]))) {
+                    refined[optionName] = currentRefined[optionName];
+                }
+                else {
+                    if (raw[optionName] === this.currentCalendarOptionsInput[optionName] ||
+                        (COMPLEX_OPTION_COMPARATORS[optionName] &&
+                            COMPLEX_OPTION_COMPARATORS[optionName](raw[optionName], this.currentCalendarOptionsInput[optionName]))) {
+                        if (optionName in this.currentCalendarOptionsRefined) { // might be an "extra" prop
+                            refined[optionName] = this.currentCalendarOptionsRefined[optionName];
+                        }
+                    }
+                    else if (refiners[optionName]) {
+                        refined[optionName] = refiners[optionName](raw[optionName]);
+                    }
+                    else {
+                        extra[optionName] = raw[optionName];
+                    }
+                    anyChanges = true;
+                }
+            }
+            if (anyChanges) {
+                this.currentViewOptionsInput = raw;
+                this.currentViewOptionsRefined = refined;
+            }
+            return {
+                rawOptions: this.currentViewOptionsInput,
+                refinedOptions: this.currentViewOptionsRefined,
+                extra,
+            };
+        }
+    }
+    function buildDateEnv$1(timeZone, explicitLocale, weekNumberCalculation, firstDay, weekText, pluginHooks, availableLocaleData, defaultSeparator) {
+        let locale = buildLocale(explicitLocale || availableLocaleData.defaultCode, availableLocaleData.map);
+        return new DateEnv({
+            calendarSystem: 'gregory',
+            timeZone,
+            namedTimeZoneImpl: pluginHooks.namedTimeZonedImpl,
+            locale,
+            weekNumberCalculation,
+            firstDay,
+            weekText,
+            cmdFormatter: pluginHooks.cmdFormatter,
+            defaultSeparator,
+        });
+    }
+    function buildTheme(options, pluginHooks) {
+        let ThemeClass = pluginHooks.themeClasses[options.themeSystem] || StandardTheme;
+        return new ThemeClass(options);
+    }
+    function buildDateProfileGenerator(props) {
+        let DateProfileGeneratorClass = props.dateProfileGeneratorClass || DateProfileGenerator;
+        return new DateProfileGeneratorClass(props);
+    }
+    function buildViewApi(type, getCurrentData, dateEnv) {
+        return new ViewImpl(type, getCurrentData, dateEnv);
+    }
+    function buildEventUiBySource(eventSources) {
+        return mapHash(eventSources, (eventSource) => eventSource.ui);
+    }
+    function buildEventUiBases(eventDefs, eventUiSingleBase, eventUiBySource) {
+        let eventUiBases = { '': eventUiSingleBase };
+        for (let defId in eventDefs) {
+            let def = eventDefs[defId];
+            if (def.sourceId && eventUiBySource[def.sourceId]) {
+                eventUiBases[defId] = eventUiBySource[def.sourceId];
+            }
+        }
+        return eventUiBases;
+    }
+    function buildViewUiProps(calendarContext) {
+        let { options } = calendarContext;
+        return {
+            eventUiSingleBase: createEventUi({
+                display: options.eventDisplay,
+                editable: options.editable,
+                startEditable: options.eventStartEditable,
+                durationEditable: options.eventDurationEditable,
+                constraint: options.eventConstraint,
+                overlap: typeof options.eventOverlap === 'boolean' ? options.eventOverlap : undefined,
+                allow: options.eventAllow,
+                backgroundColor: options.eventBackgroundColor,
+                borderColor: options.eventBorderColor,
+                textColor: options.eventTextColor,
+                color: options.eventColor,
+                // classNames: options.eventClassNames // render hook will handle this
+            }, calendarContext),
+            selectionConfig: createEventUi({
+                constraint: options.selectConstraint,
+                overlap: typeof options.selectOverlap === 'boolean' ? options.selectOverlap : undefined,
+                allow: options.selectAllow,
+            }, calendarContext),
+        };
+    }
+    function computeIsLoading(state, context) {
+        for (let isLoadingFunc of context.pluginHooks.isLoadingFuncs) {
+            if (isLoadingFunc(state)) {
+                return true;
+            }
+        }
+        return false;
+    }
+    function parseContextBusinessHours(calendarContext) {
+        return parseBusinessHours(calendarContext.options.businessHours, calendarContext);
+    }
+    function warnUnknownOptions(options, viewName) {
+        for (let optionName in options) {
+            console.warn(`Unknown option '${optionName}'` +
+                (viewName ? ` for view '${viewName}'` : ''));
+        }
+    }
+
+    class ToolbarSection extends BaseComponent {
+        render() {
+            let children = this.props.widgetGroups.map((widgetGroup) => this.renderWidgetGroup(widgetGroup));
+            return y('div', { className: 'fc-toolbar-chunk' }, ...children);
+        }
+        renderWidgetGroup(widgetGroup) {
+            let { props } = this;
+            let { theme } = this.context;
+            let children = [];
+            let isOnlyButtons = true;
+            for (let widget of widgetGroup) {
+                let { buttonName, buttonClick, buttonText, buttonIcon, buttonHint } = widget;
+                if (buttonName === 'title') {
+                    isOnlyButtons = false;
+                    children.push(y("h2", { className: "fc-toolbar-title", id: props.titleId }, props.title));
+                }
+                else {
+                    let isPressed = buttonName === props.activeButton;
+                    let isDisabled = (!props.isTodayEnabled && buttonName === 'today') ||
+                        (!props.isPrevEnabled && buttonName === 'prev') ||
+                        (!props.isNextEnabled && buttonName === 'next');
+                    let buttonClasses = [`fc-${buttonName}-button`, theme.getClass('button')];
+                    if (isPressed) {
+                        buttonClasses.push(theme.getClass('buttonActive'));
+                    }
+                    children.push(y("button", { type: "button", title: typeof buttonHint === 'function' ? buttonHint(props.navUnit) : buttonHint, disabled: isDisabled, "aria-pressed": isPressed, className: buttonClasses.join(' '), onClick: buttonClick }, buttonText || (buttonIcon ? y("span", { className: buttonIcon, role: "img" }) : '')));
+                }
+            }
+            if (children.length > 1) {
+                let groupClassName = (isOnlyButtons && theme.getClass('buttonGroup')) || '';
+                return y('div', { className: groupClassName }, ...children);
+            }
+            return children[0];
+        }
+    }
+
+    class Toolbar extends BaseComponent {
+        render() {
+            let { model, extraClassName } = this.props;
+            let forceLtr = false;
+            let startContent;
+            let endContent;
+            let sectionWidgets = model.sectionWidgets;
+            let centerContent = sectionWidgets.center;
+            if (sectionWidgets.left) {
+                forceLtr = true;
+                startContent = sectionWidgets.left;
+            }
+            else {
+                startContent = sectionWidgets.start;
+            }
+            if (sectionWidgets.right) {
+                forceLtr = true;
+                endContent = sectionWidgets.right;
+            }
+            else {
+                endContent = sectionWidgets.end;
+            }
+            let classNames = [
+                extraClassName || '',
+                'fc-toolbar',
+                forceLtr ? 'fc-toolbar-ltr' : '',
+            ];
+            return (y("div", { className: classNames.join(' ') },
+                this.renderSection('start', startContent || []),
+                this.renderSection('center', centerContent || []),
+                this.renderSection('end', endContent || [])));
+        }
+        renderSection(key, widgetGroups) {
+            let { props } = this;
+            return (y(ToolbarSection, { key: key, widgetGroups: widgetGroups, title: props.title, navUnit: props.navUnit, activeButton: props.activeButton, isTodayEnabled: props.isTodayEnabled, isPrevEnabled: props.isPrevEnabled, isNextEnabled: props.isNextEnabled, titleId: props.titleId }));
+        }
+    }
+
+    class ViewHarness extends BaseComponent {
+        constructor() {
+            super(...arguments);
+            this.state = {
+                availableWidth: null,
+            };
+            this.handleEl = (el) => {
+                this.el = el;
+                setRef(this.props.elRef, el);
+                this.updateAvailableWidth();
+            };
+            this.handleResize = () => {
+                this.updateAvailableWidth();
+            };
+        }
+        render() {
+            let { props, state } = this;
+            let { aspectRatio } = props;
+            let classNames = [
+                'fc-view-harness',
+                (aspectRatio || props.liquid || props.height)
+                    ? 'fc-view-harness-active' // harness controls the height
+                    : 'fc-view-harness-passive', // let the view do the height
+            ];
+            let height = '';
+            let paddingBottom = '';
+            if (aspectRatio) {
+                if (state.availableWidth !== null) {
+                    height = state.availableWidth / aspectRatio;
+                }
+                else {
+                    // while waiting to know availableWidth, we can't set height to *zero*
+                    // because will cause lots of unnecessary scrollbars within scrollgrid.
+                    // BETTER: don't start rendering ANYTHING yet until we know container width
+                    // NOTE: why not always use paddingBottom? Causes height oscillation (issue 5606)
+                    paddingBottom = `${(1 / aspectRatio) * 100}%`;
+                }
+            }
+            else {
+                height = props.height || '';
+            }
+            return (y("div", { "aria-labelledby": props.labeledById, ref: this.handleEl, className: classNames.join(' '), style: { height, paddingBottom } }, props.children));
+        }
+        componentDidMount() {
+            this.context.addResizeHandler(this.handleResize);
+        }
+        componentWillUnmount() {
+            this.context.removeResizeHandler(this.handleResize);
+        }
+        updateAvailableWidth() {
+            if (this.el && // needed. but why?
+                this.props.aspectRatio // aspectRatio is the only height setting that needs availableWidth
+            ) {
+                this.setState({ availableWidth: this.el.offsetWidth });
+            }
+        }
+    }
+
+    /*
+    Detects when the user clicks on an event within a DateComponent
+    */
+    class EventClicking extends Interaction {
+        constructor(settings) {
+            super(settings);
+            this.handleSegClick = (ev, segEl) => {
+                let { component } = this;
+                let { context } = component;
+                let seg = getElSeg(segEl);
+                if (seg && // might be the <div> surrounding the more link
+                    component.isValidSegDownEl(ev.target)) {
+                    // our way to simulate a link click for elements that can't be <a> tags
+                    // grab before trigger fired in case trigger trashes DOM thru rerendering
+                    let hasUrlContainer = elementClosest(ev.target, '.fc-event-forced-url');
+                    let url = hasUrlContainer ? hasUrlContainer.querySelector('a[href]').href : '';
+                    context.emitter.trigger('eventClick', {
+                        el: segEl,
+                        event: new EventImpl(component.context, seg.eventRange.def, seg.eventRange.instance),
+                        jsEvent: ev,
+                        view: context.viewApi,
+                    });
+                    if (url && !ev.defaultPrevented) {
+                        window.location.href = url;
+                    }
+                }
+            };
+            this.destroy = listenBySelector(settings.el, 'click', '.fc-event', // on both fg and bg events
+            this.handleSegClick);
+        }
+    }
+
+    /*
+    Triggers events and adds/removes core classNames when the user's pointer
+    enters/leaves event-elements of a component.
+    */
+    class EventHovering extends Interaction {
+        constructor(settings) {
+            super(settings);
+            // for simulating an eventMouseLeave when the event el is destroyed while mouse is over it
+            this.handleEventElRemove = (el) => {
+                if (el === this.currentSegEl) {
+                    this.handleSegLeave(null, this.currentSegEl);
+                }
+            };
+            this.handleSegEnter = (ev, segEl) => {
+                if (getElSeg(segEl)) { // TODO: better way to make sure not hovering over more+ link or its wrapper
+                    this.currentSegEl = segEl;
+                    this.triggerEvent('eventMouseEnter', ev, segEl);
+                }
+            };
+            this.handleSegLeave = (ev, segEl) => {
+                if (this.currentSegEl) {
+                    this.currentSegEl = null;
+                    this.triggerEvent('eventMouseLeave', ev, segEl);
+                }
+            };
+            this.removeHoverListeners = listenToHoverBySelector(settings.el, '.fc-event', // on both fg and bg events
+            this.handleSegEnter, this.handleSegLeave);
+        }
+        destroy() {
+            this.removeHoverListeners();
+        }
+        triggerEvent(publicEvName, ev, segEl) {
+            let { component } = this;
+            let { context } = component;
+            let seg = getElSeg(segEl);
+            if (!ev || component.isValidSegDownEl(ev.target)) {
+                context.emitter.trigger(publicEvName, {
+                    el: segEl,
+                    event: new EventImpl(context, seg.eventRange.def, seg.eventRange.instance),
+                    jsEvent: ev,
+                    view: context.viewApi,
+                });
+            }
+        }
+    }
+
+    class CalendarContent extends PureComponent {
+        constructor() {
+            super(...arguments);
+            this.buildViewContext = memoize(buildViewContext);
+            this.buildViewPropTransformers = memoize(buildViewPropTransformers);
+            this.buildToolbarProps = memoize(buildToolbarProps);
+            this.headerRef = d();
+            this.footerRef = d();
+            this.interactionsStore = {};
+            // eslint-disable-next-line
+            this.state = {
+                viewLabelId: getUniqueDomId(),
+            };
+            // Component Registration
+            // -----------------------------------------------------------------------------------------------------------------
+            this.registerInteractiveComponent = (component, settingsInput) => {
+                let settings = parseInteractionSettings(component, settingsInput);
+                let DEFAULT_INTERACTIONS = [
+                    EventClicking,
+                    EventHovering,
+                ];
+                let interactionClasses = DEFAULT_INTERACTIONS.concat(this.props.pluginHooks.componentInteractions);
+                let interactions = interactionClasses.map((TheInteractionClass) => new TheInteractionClass(settings));
+                this.interactionsStore[component.uid] = interactions;
+                interactionSettingsStore[component.uid] = settings;
+            };
+            this.unregisterInteractiveComponent = (component) => {
+                let listeners = this.interactionsStore[component.uid];
+                if (listeners) {
+                    for (let listener of listeners) {
+                        listener.destroy();
+                    }
+                    delete this.interactionsStore[component.uid];
+                }
+                delete interactionSettingsStore[component.uid];
+            };
+            // Resizing
+            // -----------------------------------------------------------------------------------------------------------------
+            this.resizeRunner = new DelayedRunner(() => {
+                this.props.emitter.trigger('_resize', true); // should window resizes be considered "forced" ?
+                this.props.emitter.trigger('windowResize', { view: this.props.viewApi });
+            });
+            this.handleWindowResize = (ev) => {
+                let { options } = this.props;
+                if (options.handleWindowResize &&
+                    ev.target === window // avoid jqui events
+                ) {
+                    this.resizeRunner.request(options.windowResizeDelay);
+                }
+            };
+        }
+        /*
+        renders INSIDE of an outer div
+        */
+        render() {
+            let { props } = this;
+            let { toolbarConfig, options } = props;
+            let viewVGrow = false;
+            let viewHeight = '';
+            let viewAspectRatio;
+            if (props.isHeightAuto || props.forPrint) {
+                viewHeight = '';
+            }
+            else if (options.height != null) {
+                viewVGrow = true;
+            }
+            else if (options.contentHeight != null) {
+                viewHeight = options.contentHeight;
+            }
+            else {
+                viewAspectRatio = Math.max(options.aspectRatio, 0.5); // prevent from getting too tall
+            }
+            let viewContext = this.buildViewContext(props.viewSpec, props.viewApi, props.options, props.dateProfileGenerator, props.dateEnv, props.nowManager, props.theme, props.pluginHooks, props.dispatch, props.getCurrentData, props.emitter, props.calendarApi, this.registerInteractiveComponent, this.unregisterInteractiveComponent);
+            let viewLabelId = (toolbarConfig.header && toolbarConfig.header.hasTitle)
+                ? this.state.viewLabelId
+                : undefined;
+            return (y(ViewContextType.Provider, { value: viewContext },
+                y(NowTimer, { unit: "day" }, (nowDate) => {
+                    let toolbarProps = this.buildToolbarProps(props.viewSpec, props.dateProfile, props.dateProfileGenerator, props.currentDate, nowDate, props.viewTitle);
+                    return (y(_, null,
+                        toolbarConfig.header && (y(Toolbar, Object.assign({ ref: this.headerRef, extraClassName: "fc-header-toolbar", model: toolbarConfig.header, titleId: viewLabelId }, toolbarProps))),
+                        y(ViewHarness, { liquid: viewVGrow, height: viewHeight, aspectRatio: viewAspectRatio, labeledById: viewLabelId },
+                            this.renderView(props),
+                            this.buildAppendContent()),
+                        toolbarConfig.footer && (y(Toolbar, Object.assign({ ref: this.footerRef, extraClassName: "fc-footer-toolbar", model: toolbarConfig.footer, titleId: "" }, toolbarProps)))));
+                })));
+        }
+        componentDidMount() {
+            let { props } = this;
+            this.calendarInteractions = props.pluginHooks.calendarInteractions
+                .map((CalendarInteractionClass) => new CalendarInteractionClass(props));
+            window.addEventListener('resize', this.handleWindowResize);
+            let { propSetHandlers } = props.pluginHooks;
+            for (let propName in propSetHandlers) {
+                propSetHandlers[propName](props[propName], props);
+            }
+        }
+        componentDidUpdate(prevProps) {
+            let { props } = this;
+            let { propSetHandlers } = props.pluginHooks;
+            for (let propName in propSetHandlers) {
+                if (props[propName] !== prevProps[propName]) {
+                    propSetHandlers[propName](props[propName], props);
+                }
+            }
+        }
+        componentWillUnmount() {
+            window.removeEventListener('resize', this.handleWindowResize);
+            this.resizeRunner.clear();
+            for (let interaction of this.calendarInteractions) {
+                interaction.destroy();
+            }
+            this.props.emitter.trigger('_unmount');
+        }
+        buildAppendContent() {
+            let { props } = this;
+            let children = props.pluginHooks.viewContainerAppends.map((buildAppendContent) => buildAppendContent(props));
+            return y(_, {}, ...children);
+        }
+        renderView(props) {
+            let { pluginHooks } = props;
+            let { viewSpec } = props;
+            let viewProps = {
+                dateProfile: props.dateProfile,
+                businessHours: props.businessHours,
+                eventStore: props.renderableEventStore,
+                eventUiBases: props.eventUiBases,
+                dateSelection: props.dateSelection,
+                eventSelection: props.eventSelection,
+                eventDrag: props.eventDrag,
+                eventResize: props.eventResize,
+                isHeightAuto: props.isHeightAuto,
+                forPrint: props.forPrint,
+            };
+            let transformers = this.buildViewPropTransformers(pluginHooks.viewPropsTransformers);
+            for (let transformer of transformers) {
+                Object.assign(viewProps, transformer.transform(viewProps, props));
+            }
+            let ViewComponent = viewSpec.component;
+            return (y(ViewComponent, Object.assign({}, viewProps)));
+        }
+    }
+    function buildToolbarProps(viewSpec, dateProfile, dateProfileGenerator, currentDate, now, title) {
+        // don't force any date-profiles to valid date profiles (the `false`) so that we can tell if it's invalid
+        let todayInfo = dateProfileGenerator.build(now, undefined, false); // TODO: need `undefined` or else INFINITE LOOP for some reason
+        let prevInfo = dateProfileGenerator.buildPrev(dateProfile, currentDate, false);
+        let nextInfo = dateProfileGenerator.buildNext(dateProfile, currentDate, false);
+        return {
+            title,
+            activeButton: viewSpec.type,
+            navUnit: viewSpec.singleUnit,
+            isTodayEnabled: todayInfo.isValid && !rangeContainsMarker(dateProfile.currentRange, now),
+            isPrevEnabled: prevInfo.isValid,
+            isNextEnabled: nextInfo.isValid,
+        };
+    }
+    // Plugin
+    // -----------------------------------------------------------------------------------------------------------------
+    function buildViewPropTransformers(theClasses) {
+        return theClasses.map((TheClass) => new TheClass());
+    }
+
+    class Calendar extends CalendarImpl {
+        constructor(el, optionOverrides = {}) {
+            super();
+            this.isRendering = false;
+            this.isRendered = false;
+            this.currentClassNames = [];
+            this.customContentRenderId = 0;
+            this.handleAction = (action) => {
+                // actions we know we want to render immediately
+                switch (action.type) {
+                    case 'SET_EVENT_DRAG':
+                    case 'SET_EVENT_RESIZE':
+                        this.renderRunner.tryDrain();
+                }
+            };
+            this.handleData = (data) => {
+                this.currentData = data;
+                this.renderRunner.request(data.calendarOptions.rerenderDelay);
+            };
+            this.handleRenderRequest = () => {
+                if (this.isRendering) {
+                    this.isRendered = true;
+                    let { currentData } = this;
+                    flushSync(() => {
+                        D$1(y(CalendarRoot, { options: currentData.calendarOptions, theme: currentData.theme, emitter: currentData.emitter }, (classNames, height, isHeightAuto, forPrint) => {
+                            this.setClassNames(classNames);
+                            this.setHeight(height);
+                            return (y(RenderId.Provider, { value: this.customContentRenderId },
+                                y(CalendarContent, Object.assign({ isHeightAuto: isHeightAuto, forPrint: forPrint }, currentData))));
+                        }), this.el);
+                    });
+                }
+                else if (this.isRendered) {
+                    this.isRendered = false;
+                    D$1(null, this.el);
+                    this.setClassNames([]);
+                    this.setHeight('');
+                }
+            };
+            ensureElHasStyles(el);
+            this.el = el;
+            this.renderRunner = new DelayedRunner(this.handleRenderRequest);
+            new CalendarDataManager({
+                optionOverrides,
+                calendarApi: this,
+                onAction: this.handleAction,
+                onData: this.handleData,
+            });
+        }
+        render() {
+            let wasRendering = this.isRendering;
+            if (!wasRendering) {
+                this.isRendering = true;
+            }
+            else {
+                this.customContentRenderId += 1;
+            }
+            this.renderRunner.request();
+            if (wasRendering) {
+                this.updateSize();
+            }
+        }
+        destroy() {
+            if (this.isRendering) {
+                this.isRendering = false;
+                this.renderRunner.request();
+            }
+        }
+        updateSize() {
+            flushSync(() => {
+                super.updateSize();
+            });
+        }
+        batchRendering(func) {
+            this.renderRunner.pause('batchRendering');
+            func();
+            this.renderRunner.resume('batchRendering');
+        }
+        pauseRendering() {
+            this.renderRunner.pause('pauseRendering');
+        }
+        resumeRendering() {
+            this.renderRunner.resume('pauseRendering', true);
+        }
+        resetOptions(optionOverrides, changedOptionNames) {
+            this.currentDataManager.resetOptions(optionOverrides, changedOptionNames);
+        }
+        setClassNames(classNames) {
+            if (!isArraysEqual(classNames, this.currentClassNames)) {
+                let { classList } = this.el;
+                for (let className of this.currentClassNames) {
+                    classList.remove(className);
+                }
+                for (let className of classNames) {
+                    classList.add(className);
+                }
+                this.currentClassNames = classNames;
+            }
+        }
+        setHeight(height) {
+            applyStyleProp(this.el, 'height', height);
+        }
+    }
+
+    function formatDate(dateInput, options = {}) {
+        let dateEnv = buildDateEnv(options);
+        let formatter = createFormatter(options);
+        let dateMeta = dateEnv.createMarkerMeta(dateInput);
+        if (!dateMeta) { // TODO: warning?
+            return '';
+        }
+        return dateEnv.format(dateMeta.marker, formatter, {
+            forcedTzo: dateMeta.forcedTzo,
+        });
+    }
+    function formatRange(startInput, endInput, options) {
+        let dateEnv = buildDateEnv(typeof options === 'object' && options ? options : {}); // pass in if non-null object
+        let formatter = createFormatter(options);
+        let startMeta = dateEnv.createMarkerMeta(startInput);
+        let endMeta = dateEnv.createMarkerMeta(endInput);
+        if (!startMeta || !endMeta) { // TODO: warning?
+            return '';
+        }
+        return dateEnv.formatRange(startMeta.marker, endMeta.marker, formatter, {
+            forcedStartTzo: startMeta.forcedTzo,
+            forcedEndTzo: endMeta.forcedTzo,
+            isEndExclusive: options.isEndExclusive,
+            defaultSeparator: BASE_OPTION_DEFAULTS.defaultRangeSeparator,
+        });
+    }
+    // TODO: more DRY and optimized
+    function buildDateEnv(settings) {
+        let locale = buildLocale(settings.locale || 'en', organizeRawLocales([]).map); // TODO: don't hardcode 'en' everywhere
+        return new DateEnv(Object.assign(Object.assign({ timeZone: BASE_OPTION_DEFAULTS.timeZone, calendarSystem: 'gregory' }, settings), { locale }));
+    }
+
+    // HELPERS
+    /*
+    if nextDayThreshold is specified, slicing is done in an all-day fashion.
+    you can get nextDayThreshold from context.nextDayThreshold
+    */
+    function sliceEvents(props, allDay) {
+        return sliceEventStore(props.eventStore, props.eventUiBases, props.dateProfile.activeRange, allDay ? props.nextDayThreshold : null).fg;
+    }
+
+    const version = '6.1.17';
+
+    exports.Calendar = Calendar;
+    exports.Internal = internal;
+    exports.JsonRequestError = JsonRequestError;
+    exports.Preact = preact;
+    exports.createPlugin = createPlugin;
+    exports.formatDate = formatDate;
+    exports.formatRange = formatRange;
+    exports.globalLocales = globalLocales;
+    exports.globalPlugins = globalPlugins;
+    exports.sliceEvents = sliceEvents;
+    exports.version = version;
+
+    Object.defineProperty(exports, '__esModule', { value: true });
+
+    return exports;
+
+})({});
-- 
cgit v1.2.3