text: /*!
  FullCalendar Core Package v4.4.2
  Docs & License: https://fullcalendar.io/
  (c) 2019 Adam Shaw
  */
  
  (function (global, factory) {
      typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
      typeof define === 'function' && define.amd ? define(['exports'], factory) :
      (global = global || self, factory(global.FullCalendar = {}));
  }(this, function (exports) { 'use strict';
  
      // Creating
      // ----------------------------------------------------------------------------------------------------------------
      var elementPropHash = {
          className: true,
          colSpan: true,
          rowSpan: true
      };
      var containerTagHash = {
          '<tr': 'tbody',
          '<td': 'tr'
      };
      function createElement(tagName, attrs, content) {
          var el = document.createElement(tagName);
          if (attrs) {
              for (var attrName in attrs) {
                  if (attrName === 'style') {
                      applyStyle(el, attrs[attrName]);
                  }
                  else if (elementPropHash[attrName]) {
                      el[attrName] = attrs[attrName];
                  }
                  else {
                      el.setAttribute(attrName, attrs[attrName]);
                  }
              }
          }
          if (typeof content === 'string') {
              el.innerHTML = content; // shortcut. no need to process HTML in any way
          }
          else if (content != null) {
              appendToElement(el, content);
          }
          return el;
      }
      function htmlToElement(html) {
          html = html.trim();
          var container = document.createElement(computeContainerTag(html));
          container.innerHTML = html;
          return container.firstChild;
      }
      function htmlToElements(html) {
          return Array.prototype.slice.call(htmlToNodeList(html));
      }
      function htmlToNodeList(html) {
          html = html.trim();
          var container = document.createElement(computeContainerTag(html));
          container.innerHTML = html;
          return container.childNodes;
      }
      // assumes html already trimmed and tag names are lowercase
      function computeContainerTag(html) {
          return containerTagHash[html.substr(0, 3) // faster than using regex
          ] || 'div';
      }
      function appendToElement(el, content) {
          var childNodes = normalizeContent(content);
          for (var i = 0; i < childNodes.length; i++) {
              el.appendChild(childNodes[i]);
          }
      }
      function prependToElement(parent, content) {
          var newEls = normalizeContent(content);
          var afterEl = parent.firstChild || null; // if no firstChild, will append to end, but that's okay, b/c there were no children
          for (var i = 0; i < newEls.length; i++) {
              parent.insertBefore(newEls[i], afterEl);
          }
      }
      function insertAfterElement(refEl, content) {
          var newEls = normalizeContent(content);
          var afterEl = refEl.nextSibling || null;
          for (var i = 0; i < newEls.length; i++) {
              refEl.parentNode.insertBefore(newEls[i], afterEl);
          }
      }
      function normalizeContent(content) {
          var els;
          if (typeof content === 'string') {
              els = htmlToElements(content);
          }
          else if (content instanceof Node) {
              els = [content];
          }
          else { // Node[] or NodeList
              els = Array.prototype.slice.call(content);
          }
          return els;
      }
      function removeElement(el) {
          if (el.parentNode) {
              el.parentNode.removeChild(el);
          }
      }
      // Querying
      // ----------------------------------------------------------------------------------------------------------------
      // from https://developer.mozilla.org/en-US/docs/Web/API/Element/closest
      var matchesMethod = Element.prototype.matches ||
          Element.prototype.matchesSelector ||
          Element.prototype.msMatchesSelector;
      var closestMethod = Element.prototype.closest || function (selector) {
          // polyfill
          var el = this;
          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 elementClosest(el, selector) {
          return closestMethod.call(el, selector);
      }
      function elementMatches(el, selector) {
          return matchesMethod.call(el, selector);
      }
      // accepts multiple subject els
      // returns a real array. good for methods like forEach
      function findElements(container, selector) {
          var containers = container instanceof HTMLElement ? [container] : container;
          var allMatches = [];
          for (var i = 0; i < containers.length; i++) {
              var matches = containers[i].querySelectorAll(selector);
              for (var j = 0; j < matches.length; j++) {
                  allMatches.push(matches[j]);
              }
          }
          return allMatches;
      }
      // accepts multiple subject els
      // only queries direct child elements
      function findChildren(parent, selector) {
          var parents = parent instanceof HTMLElement ? [parent] : parent;
          var allMatches = [];
          for (var i = 0; i < parents.length; i++) {
              var childNodes = parents[i].children; // only ever elements
              for (var j = 0; j < childNodes.length; j++) {
                  var childNode = childNodes[j];
                  if (!selector || elementMatches(childNode, selector)) {
                      allMatches.push(childNode);
                  }
              }
          }
          return allMatches;
      }
      // Attributes
      // ----------------------------------------------------------------------------------------------------------------
      function forceClassName(el, className, bool) {
          if (bool) {
              el.classList.add(className);
          }
          else {
              el.classList.remove(className);
          }
      }
      // Style
      // ----------------------------------------------------------------------------------------------------------------
      var PIXEL_PROP_RE = /(top|left|right|bottom|width|height)$/i;
      function applyStyle(el, props) {
          for (var 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;
          }
      }
  
      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) {
          var 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
          };
      }
  
      // Logic for determining if, when the element is right-to-left, the scrollbar appears on the left side
      var isRtlScrollbarOnLeft = null;
      function getIsRtlScrollbarOnLeft() {
          if (isRtlScrollbarOnLeft === null) {
              isRtlScrollbarOnLeft = computeIsRtlScrollbarOnLeft();
          }
          return isRtlScrollbarOnLeft;
      }
      function computeIsRtlScrollbarOnLeft() {
          var outerEl = createElement('div', {
              style: {
                  position: 'absolute',
                  top: -1000,
                  left: 0,
                  border: 0,
                  padding: 0,
                  overflow: 'scroll',
                  direction: 'rtl'
              }
          }, '<div></div>');
          document.body.appendChild(outerEl);
          var innerEl = outerEl.firstChild;
          var res = innerEl.getBoundingClientRect().left > outerEl.getBoundingClientRect().left;
          removeElement(outerEl);
          return res;
      }
      // The scrollbar width computations in computeEdges are sometimes flawed when it comes to
      // retina displays, rounding, and IE11. Massage them into a usable value.
      function sanitizeScrollbarWidth(width) {
          width = Math.max(0, width); // no negatives
          width = Math.round(width);
          return width;
      }
  
      function computeEdges(el, getPadding) {
          if (getPadding === void 0) { getPadding = false; }
          var computedStyle = window.getComputedStyle(el);
          var borderLeft = parseInt(computedStyle.borderLeftWidth, 10) || 0;
          var borderRight = parseInt(computedStyle.borderRightWidth, 10) || 0;
          var borderTop = parseInt(computedStyle.borderTopWidth, 10) || 0;
          var borderBottom = parseInt(computedStyle.borderBottomWidth, 10) || 0;
          // must use offset(Width|Height) because compatible with client(Width|Height)
          var scrollbarLeftRight = sanitizeScrollbarWidth(el.offsetWidth - el.clientWidth - borderLeft - borderRight);
          var scrollbarBottom = sanitizeScrollbarWidth(el.offsetHeight - el.clientHeight - borderTop - borderBottom);
          var res = {
              borderLeft: borderLeft,
              borderRight: borderRight,
              borderTop: borderTop,
              borderBottom: borderBottom,
              scrollbarBottom: 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) {
          if (goWithinPadding === void 0) { goWithinPadding = false; }
          var outerRect = computeRect(el);
          var edges = computeEdges(el, goWithinPadding);
          var 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) {
          var rect = el.getBoundingClientRect();
          return {
              left: rect.left + window.pageXOffset,
              top: rect.top + window.pageYOffset,
              right: rect.right + window.pageXOffset,
              bottom: rect.bottom + window.pageYOffset
          };
      }
      function computeViewportRect() {
          return {
              left: window.pageXOffset,
              right: window.pageXOffset + document.documentElement.clientWidth,
              top: window.pageYOffset,
              bottom: window.pageYOffset + document.documentElement.clientHeight
          };
      }
      function computeHeightAndMargins(el) {
          return el.getBoundingClientRect().height + computeVMargins(el);
      }
      function computeVMargins(el) {
          var computed = window.getComputedStyle(el);
          return parseInt(computed.marginTop, 10) +
              parseInt(computed.marginBottom, 10);
      }
      // does not return window
      function getClippingParents(el) {
          var parents = [];
          while (el instanceof HTMLElement) { // will stop when gets to document or null
              var 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;
      }
      function computeClippingRect(el) {
          return getClippingParents(el)
              .map(function (el) {
              return computeInnerRect(el);
          })
              .concat(computeViewportRect())
              .reduce(function (rect0, rect1) {
              return intersectRects(rect0, rect1) || rect1; // should always intersect
          });
      }
  
      // Stops a mouse/touch event from doing it's native browser action
      function preventDefault(ev) {
          ev.preventDefault();
      }
      // Event Delegation
      // ----------------------------------------------------------------------------------------------------------------
      function listenBySelector(container, eventType, selector, handler) {
          function realHandler(ev) {
              var matchedChild = elementClosest(ev.target, selector);
              if (matchedChild) {
                  handler.call(matchedChild, ev, matchedChild);
              }
          }
          container.addEventListener(eventType, realHandler);
          return function () {
              container.removeEventListener(eventType, realHandler);
          };
      }
      function listenToHoverBySelector(container, selector, onMouseEnter, onMouseLeave) {
          var currentMatchedChild;
          return listenBySelector(container, 'mouseover', selector, function (ev, matchedChild) {
              if (matchedChild !== currentMatchedChild) {
                  currentMatchedChild = matchedChild;
                  onMouseEnter(ev, matchedChild);
                  var realOnMouseLeave_1 = function (ev) {
                      currentMatchedChild = null;
                      onMouseLeave(ev, matchedChild);
                      matchedChild.removeEventListener('mouseleave', realOnMouseLeave_1);
                  };
                  // listen to the next mouseleave, and then unattach
                  matchedChild.addEventListener('mouseleave', realOnMouseLeave_1);
              }
          });
      }
      // Animation
      // ----------------------------------------------------------------------------------------------------------------
      var transitionEventNames = [
          'webkitTransitionEnd',
          'otransitionend',
          'oTransitionEnd',
          'msTransitionEnd',
          'transitionend'
      ];
      // triggered only when the next single subsequent transition finishes
      function whenTransitionDone(el, callback) {
          var realCallback = function (ev) {
              callback(ev);
              transitionEventNames.forEach(function (eventName) {
                  el.removeEventListener(eventName, realCallback);
              });
          };
          transitionEventNames.forEach(function (eventName) {
              el.addEventListener(eventName, realCallback); // cross-browser way to determine when the transition finishes
          });
      }
  
      var DAY_IDS = ['sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat'];
      // Adding
      function addWeeks(m, n) {
          var a = dateToUtcArray(m);
          a[2] += n * 7;
          return arrayToUtcDate(a);
      }
      function addDays(m, n) {
          var a = dateToUtcArray(m);
          a[2] += n;
          return arrayToUtcDate(a);
      }
      function addMs(m, n) {
          var a = dateToUtcArray(m);
          a[6] += n;
          return arrayToUtcDate(a);
      }
      // Diffing (all return floats)
      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) {
          var m0day = startOfDay(m0);
          var 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) {
          var 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) {
          var y = marker.getUTCFullYear();
          var w = weekOfGivenYear(marker, y, dow, doy);
          if (w < 1) {
              return weekOfGivenYear(marker, y - 1, dow, doy);
          }
          var nextW = weekOfGivenYear(marker, y + 1, dow, doy);
          if (nextW >= 1) {
              return Math.min(w, nextW);
          }
          return w;
      }
      function weekOfGivenYear(marker, year, dow, doy) {
          var firstWeekStart = arrayToUtcDate([year, 0, 1 + firstWeekOffset(year, dow, doy)]);
          var dayStart = startOfDay(marker);
          var 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)
          var fwd = 7 + dow - doy;
          // first-week day local weekday -- which local weekday is fwd
          var 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.apply(Date, 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();
      }
  
      var INTERNAL_UNITS = ['years', 'months', 'days', 'milliseconds'];
      var PARSE_RE = /^(-?)(?:(\d+)\.)?(\d+):(\d\d)(?::(\d\d)(?:\.(\d\d\d))?)?/;
      // Parsing and Creation
      function createDuration(input, unit) {
          var _a;
          if (typeof input === 'string') {
              return parseString(input);
          }
          else if (typeof input === 'object' && input) { // non-null object
              return normalizeObject(input);
          }
          else if (typeof input === 'number') {
              return normalizeObject((_a = {}, _a[unit || 'milliseconds'] = input, _a));
          }
          else {
              return null;
          }
      }
      function parseString(s) {
          var m = PARSE_RE.exec(s);
          if (m) {
              var 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 normalizeObject(obj) {
          return {
              years: obj.years || obj.year || 0,
              months: obj.months || obj.month || 0,
              days: (obj.days || obj.day || 0) +
                  getWeeksFromInput(obj) * 7,
              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
          };
      }
      function getWeeksFromInput(obj) {
          return obj.weeks || obj.week || 0;
      }
      // Equality
      function durationsEqual(d0, d1) {
          return d0.years === d1.years &&
              d0.months === d1.months &&
              d0.days === d1.days &&
              d0.milliseconds === d1.milliseconds;
      }
      function isSingleDay(dur) {
          return dur.years === 0 && dur.months === 0 && dur.days === 1 && dur.milliseconds === 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) {
          var res = null;
          for (var i = 0; i < INTERNAL_UNITS.length; i++) {
              var unit = INTERNAL_UNITS[i];
              if (denominator[unit]) {
                  var 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, dontReturnWeeks) {
          var 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 (!dontReturnWeeks && 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 };
      }
  
      /* FullCalendar-specific DOM Utilities
      ----------------------------------------------------------------------------------------------------------------------*/
      // Given the scrollbar widths of some other container, create borders/margins on rowEls in order to match the left
      // and right space that was offset by the scrollbars. A 1-pixel border first, then margin beyond that.
      function compensateScroll(rowEl, scrollbarWidths) {
          if (scrollbarWidths.left) {
              applyStyle(rowEl, {
                  borderLeftWidth: 1,
                  marginLeft: scrollbarWidths.left - 1
              });
          }
          if (scrollbarWidths.right) {
              applyStyle(rowEl, {
                  borderRightWidth: 1,
                  marginRight: scrollbarWidths.right - 1
              });
          }
      }
      // Undoes compensateScroll and restores all borders/margins
      function uncompensateScroll(rowEl) {
          applyStyle(rowEl, {
              marginLeft: '',
              marginRight: '',
              borderLeftWidth: '',
              borderRightWidth: ''
          });
      }
      // 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');
      }
      // Given a total available height to fill, have `els` (essentially child rows) expand to accomodate.
      // By default, all elements that are shorter than the recommended height are expanded uniformly, not considering
      // any other els that are already too tall. if `shouldRedistribute` is on, it considers these tall rows and
      // reduces the available height.
      function distributeHeight(els, availableHeight, shouldRedistribute) {
          // *FLOORING NOTE*: we floor in certain places because zoom can give inaccurate floating-point dimensions,
          // and it is better to be shorter than taller, to avoid creating unnecessary scrollbars.
          var minOffset1 = Math.floor(availableHeight / els.length); // for non-last element
          var minOffset2 = Math.floor(availableHeight - minOffset1 * (els.length - 1)); // for last element *FLOORING NOTE*
          var flexEls = []; // elements that are allowed to expand. array of DOM nodes
          var flexOffsets = []; // amount of vertical space it takes up
          var flexHeights = []; // actual css height
          var usedHeight = 0;
          undistributeHeight(els); // give all elements their natural height
          // find elements that are below the recommended height (expandable).
          // important to query for heights in a single first pass (to avoid reflow oscillation).
          els.forEach(function (el, i) {
              var minOffset = i === els.length - 1 ? minOffset2 : minOffset1;
              var naturalHeight = el.getBoundingClientRect().height;
              var naturalOffset = naturalHeight + computeVMargins(el);
              if (naturalOffset < minOffset) {
                  flexEls.push(el);
                  flexOffsets.push(naturalOffset);
                  flexHeights.push(naturalHeight);
              }
              else {
                  // this element stretches past recommended height (non-expandable). mark the space as occupied.
                  usedHeight += naturalOffset;
              }
          });
          // readjust the recommended height to only consider the height available to non-maxed-out rows.
          if (shouldRedistribute) {
              availableHeight -= usedHeight;
              minOffset1 = Math.floor(availableHeight / flexEls.length);
              minOffset2 = Math.floor(availableHeight - minOffset1 * (flexEls.length - 1)); // *FLOORING NOTE*
          }
          // assign heights to all expandable elements
          flexEls.forEach(function (el, i) {
              var minOffset = i === flexEls.length - 1 ? minOffset2 : minOffset1;
              var naturalOffset = flexOffsets[i];
              var naturalHeight = flexHeights[i];
              var newHeight = minOffset - (naturalOffset - naturalHeight); // subtract the margin/padding
              if (naturalOffset < minOffset) { // we check this again because redistribution might have changed things
                  el.style.height = newHeight + 'px';
              }
          });
      }
      // Undoes distrubuteHeight, restoring all els to their natural height
      function undistributeHeight(els) {
          els.forEach(function (el) {
              el.style.height = '';
          });
      }
      // Given `els`, a set of <td> cells, find the cell with the largest natural width and set the widths of all the
      // cells to be that width.
      // PREREQUISITE: if you want a cell to take up width, it needs to have a single inner element w/ display:inline
      function matchCellWidths(els) {
          var maxInnerWidth = 0;
          els.forEach(function (el) {
              var innerEl = el.firstChild; // hopefully an element
              if (innerEl instanceof HTMLElement) {
                  var innerWidth_1 = innerEl.getBoundingClientRect().width;
                  if (innerWidth_1 > maxInnerWidth) {
                      maxInnerWidth = innerWidth_1;
                  }
              }
          });
          maxInnerWidth++; // sometimes not accurate of width the text needs to stay on one line. insurance
          els.forEach(function (el) {
              el.style.width = maxInnerWidth + 'px';
          });
          return maxInnerWidth;
      }
      // Given one element that resides inside another,
      // Subtracts the height of the inner element from the outer element.
      function subtractInnerElHeight(outerEl, innerEl) {
          // effin' IE8/9/10/11 sometimes returns 0 for dimensions. this weird hack was the only thing that worked
          var reflowStyleProps = {
              position: 'relative',
              left: -1 // ensure reflow in case the el was already relative. negative is less likely to cause new scroll
          };
          applyStyle(outerEl, reflowStyleProps);
          applyStyle(innerEl, reflowStyleProps);
          var diff = // grab the dimensions
           outerEl.getBoundingClientRect().height -
              innerEl.getBoundingClientRect().height;
          // undo hack
          var resetStyleProps = { position: '', left: '' };
          applyStyle(outerEl, resetStyleProps);
          applyStyle(innerEl, resetStyleProps);
          return diff;
      }
      /* Selection
      ----------------------------------------------------------------------------------------------------------------------*/
      function preventSelection(el) {
          el.classList.add('fc-unselectable');
          el.addEventListener('selectstart', preventDefault);
      }
      function allowSelection(el) {
          el.classList.remove('fc-unselectable');
          el.removeEventListener('selectstart', preventDefault);
      }
      /* Context Menu
      ----------------------------------------------------------------------------------------------------------------------*/
      function preventContextMenu(el) {
          el.addEventListener('contextmenu', preventDefault);
      }
      function allowContextMenu(el) {
          el.removeEventListener('contextmenu', preventDefault);
      }
      /* Object Ordering by Field
      ----------------------------------------------------------------------------------------------------------------------*/
      function parseFieldSpecs(input) {
          var specs = [];
          var tokens = [];
          var i;
          var 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++) {
              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) {
          var i;
          var cmp;
          for (i = 0; i < fieldSpecs.length; i++) {
              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 capitaliseFirstLetter(str) {
          return str.charAt(0).toUpperCase() + str.slice(1);
      }
      function padStart(val, len) {
          var s = String(val);
          return '000'.substr(0, len - s.length) + s;
      }
      /* Number Utilities
      ----------------------------------------------------------------------------------------------------------------------*/
      function compareNumbers(a, b) {
          return a - b;
      }
      function isInt(n) {
          return n % 1 === 0;
      }
      /* Weird Utilities
      ----------------------------------------------------------------------------------------------------------------------*/
      function applyAll(functions, thisObj, args) {
          if (typeof functions === 'function') { // supplied a single function
              functions = [functions];
          }
          if (functions) {
              var i = void 0;
              var ret = void 0;
              for (i = 0; i < functions.length; i++) {
                  ret = functions[i].apply(thisObj, args) || ret;
              }
              return ret;
          }
      }
      function firstDefined() {
          var args = [];
          for (var _i = 0; _i < arguments.length; _i++) {
              args[_i] = arguments[_i];
          }
          for (var i = 0; i < args.length; i++) {
              if (args[i] !== undefined) {
                  return args[i];
              }
          }
      }
      // Returns a function, that, as long as it continues to be invoked, will not
      // be triggered. The function will be called after it stops being called for
      // N milliseconds. If `immediate` is passed, trigger the function on the
      // leading edge, instead of the trailing.
      // https://github.com/jashkenas/underscore/blob/1.6.0/underscore.js#L714
      function debounce(func, wait) {
          var timeout;
          var args;
          var context;
          var timestamp;
          var result;
          var later = function () {
              var last = new Date().valueOf() - timestamp;
              if (last < wait) {
                  timeout = setTimeout(later, wait - last);
              }
              else {
                  timeout = null;
                  result = func.apply(context, args);
                  context = args = null;
              }
          };
          return function () {
              context = this;
              args = arguments;
              timestamp = new Date().valueOf();
              if (!timeout) {
                  timeout = setTimeout(later, wait);
              }
              return result;
          };
      }
      // Number and Boolean are only types that defaults or not computed for
      // TODO: write more comments
      function refineProps(rawProps, processors, defaults, leftoverProps) {
          if (defaults === void 0) { defaults = {}; }
          var refined = {};
          for (var key in processors) {
              var processor = processors[key];
              if (rawProps[key] !== undefined) {
                  // found
                  if (processor === Function) {
                      refined[key] = typeof rawProps[key] === 'function' ? rawProps[key] : null;
                  }
                  else if (processor) { // a refining function?
                      refined[key] = processor(rawProps[key]);
                  }
                  else {
                      refined[key] = rawProps[key];
                  }
              }
              else if (defaults[key] !== undefined) {
                  // there's an explicit default
                  refined[key] = defaults[key];
              }
              else {
                  // must compute a default
                  if (processor === String) {
                      refined[key] = ''; // empty string is default for String
                  }
                  else if (!processor || processor === Number || processor === Boolean || processor === Function) {
                      refined[key] = null; // assign null for other non-custom processor funcs
                  }
                  else {
                      refined[key] = processor(null); // run the custom processor func
                  }
              }
          }
          if (leftoverProps) {
              for (var key in rawProps) {
                  if (processors[key] === undefined) {
                      leftoverProps[key] = rawProps[key];
                  }
              }
          }
          return refined;
      }
      /* 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) {
          var dayCnt = Math.floor(diffDays(timedRange.start, timedRange.end)) || 1;
          var start = startOfDay(timedRange.start);
          var end = addDays(start, dayCnt);
          return { start: start, end: 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) {
          if (nextDayThreshold === void 0) { nextDayThreshold = createDuration(0); }
          var startDay = null;
          var endDay = null;
          if (timedRange.end) {
              endDay = startOfDay(timedRange.end);
              var 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) {
          var 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');
          }
          else if (largeUnit === 'month') {
              return createDuration(dateEnv.diffWholeMonths(date0, date1), 'month');
          }
          else {
              return diffDayAndTime(date0, date1); // returns a duration
          }
      }
  
      /*! *****************************************************************************
      Copyright (c) Microsoft Corporation.
  
      Permission to use, copy, modify, and/or distribute this software for any
      purpose with or without fee is hereby granted.
  
      THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
      REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
      AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
      INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
      LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
      OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
      PERFORMANCE OF THIS SOFTWARE.
      ***************************************************************************** */
      /* global Reflect, Promise */
  
      var extendStatics = function(d, b) {
          extendStatics = Object.setPrototypeOf ||
              ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
              function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
          return extendStatics(d, b);
      };
  
      function __extends(d, b) {
          extendStatics(d, b);
          function __() { this.constructor = d; }
          d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
      }
  
      var __assign = function() {
          __assign = Object.assign || function __assign(t) {
              for (var s, i = 1, n = arguments.length; i < n; i++) {
                  s = arguments[i];
                  for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];
              }
              return t;
          };
          return __assign.apply(this, arguments);
      };
  
      function parseRecurring(eventInput, allDayDefault, dateEnv, recurringTypes, leftovers) {
          for (var i = 0; i < recurringTypes.length; i++) {
              var localLeftovers = {};
              var parsed = recurringTypes[i].parse(eventInput, localLeftovers, dateEnv);
              if (parsed) {
                  var allDay = localLeftovers.allDay;
                  delete localLeftovers.allDay; // remove from leftovers
                  if (allDay == null) {
                      allDay = allDayDefault;
                      if (allDay == null) {
                          allDay = parsed.allDayGuess;
                          if (allDay == null) {
                              allDay = false;
                          }
                      }
                  }
                  __assign(leftovers, localLeftovers);
                  return {
                      allDay: allDay,
                      duration: parsed.duration,
                      typeData: parsed.typeData,
                      typeId: i
                  };
              }
          }
          return null;
      }
      /*
      Event MUST have a recurringDef
      */
      function expandRecurringRanges(eventDef, duration, framingRange, dateEnv, recurringTypes) {
          var typeDef = recurringTypes[eventDef.recurringDef.typeId];
          var 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;
      }
  
      var hasOwnProperty = Object.prototype.hasOwnProperty;
      // 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, complexProps) {
          var dest = {};
          var i;
          var name;
          var complexObjs;
          var j;
          var val;
          var props;
          if (complexProps) {
              for (i = 0; i < complexProps.length; i++) {
                  name = complexProps[i];
                  complexObjs = [];
                  // collect the trailing object values, stopping when a non-object is discovered
                  for (j = propObjs.length - 1; j >= 0; j--) {
                      val = propObjs[j][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 (i = propObjs.length - 1; i >= 0; i--) {
              props = propObjs[i];
              for (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) {
          var filtered = {};
          for (var key in hash) {
              if (func(hash[key], key)) {
                  filtered[key] = hash[key];
              }
          }
          return filtered;
      }
      function mapHash(hash, func) {
          var newHash = {};
          for (var key in hash) {
              newHash[key] = func(hash[key], key);
          }
          return newHash;
      }
      function arrayToHash(a) {
          var hash = {};
          for (var _i = 0, a_1 = a; _i < a_1.length; _i++) {
              var item = a_1[_i];
              hash[item] = true;
          }
          return hash;
      }
      function hashValuesToArray(obj) {
          var a = [];
          for (var key in obj) {
              a.push(obj[key]);
          }
          return a;
      }
      function isPropsEqual(obj0, obj1) {
          for (var key in obj0) {
              if (hasOwnProperty.call(obj0, key)) {
                  if (!(key in obj1)) {
                      return false;
                  }
              }
          }
          for (var key in obj1) {
              if (hasOwnProperty.call(obj1, key)) {
                  if (obj0[key] !== obj1[key]) {
                      return false;
                  }
              }
          }
          return true;
      }
  
      function parseEvents(rawEvents, sourceId, calendar, allowOpenRange) {
          var eventStore = createEmptyEventStore();
          for (var _i = 0, rawEvents_1 = rawEvents; _i < rawEvents_1.length; _i++) {
              var rawEvent = rawEvents_1[_i];
              var tuple = parseEvent(rawEvent, sourceId, calendar, allowOpenRange);
              if (tuple) {
                  eventTupleToStore(tuple, eventStore);
              }
          }
          return eventStore;
      }
      function eventTupleToStore(tuple, eventStore) {
          if (eventStore === void 0) { eventStore = createEmptyEventStore(); }
          eventStore.defs[tuple.def.defId] = tuple.def;
          if (tuple.instance) {
              eventStore.instances[tuple.instance.instanceId] = tuple.instance;
          }
          return eventStore;
      }
      function expandRecurring(eventStore, framingRange, calendar) {
          var dateEnv = calendar.dateEnv;
          var defs = eventStore.defs, instances = eventStore.instances;
          // remove existing recurring instances
          instances = filterHash(instances, function (instance) {
              return !defs[instance.defId].recurringDef;
          });
          for (var defId in defs) {
              var def = defs[defId];
              if (def.recurringDef) {
                  var duration = def.recurringDef.duration;
                  if (!duration) {
                      duration = def.allDay ?
                          calendar.defaultAllDayEventDuration :
                          calendar.defaultTimedEventDuration;
                  }
                  var starts = expandRecurringRanges(def, duration, framingRange, calendar.dateEnv, calendar.pluginSystem.hooks.recurringTypes);
                  for (var _i = 0, starts_1 = starts; _i < starts_1.length; _i++) {
                      var start = starts_1[_i];
                      var instance = createEventInstance(defId, {
                          start: start,
                          end: dateEnv.add(start, duration)
                      });
                      instances[instance.instanceId] = instance;
                  }
              }
          }
          return { defs: defs, instances: instances };
      }
      // 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) {
          var instance = eventStore.instances[instanceId];
          if (instance) {
              var def_1 = eventStore.defs[instance.defId];
              // get events/instances with same group
              var newStore = filterEventStoreDefs(eventStore, function (lookDef) {
                  return isEventDefsGrouped(def_1, lookDef);
              });
              // add the original
              // TODO: wish we could use eventTupleToStore or something like it
              newStore.defs[def_1.defId] = def_1;
              newStore.instances[instance.instanceId] = instance;
              return newStore;
          }
          return createEmptyEventStore();
      }
      function isEventDefsGrouped(def0, def1) {
          return Boolean(def0.groupId && def0.groupId === def1.groupId);
      }
      function transformRawEvents(rawEvents, eventSource, calendar) {
          var calEachTransform = calendar.opt('eventDataTransform');
          var sourceEachTransform = eventSource ? eventSource.eventDataTransform : null;
          if (sourceEachTransform) {
              rawEvents = transformEachRawEvent(rawEvents, sourceEachTransform);
          }
          if (calEachTransform) {
              rawEvents = transformEachRawEvent(rawEvents, calEachTransform);
          }
          return rawEvents;
      }
      function transformEachRawEvent(rawEvents, func) {
          var refinedEvents;
          if (!func) {
              refinedEvents = rawEvents;
          }
          else {
              refinedEvents = [];
              for (var _i = 0, rawEvents_2 = rawEvents; _i < rawEvents_2.length; _i++) {
                  var rawEvent = rawEvents_2[_i];
                  var 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 createEmptyEventStore() {
          return { defs: {}, instances: {} };
      }
      function mergeEventStores(store0, store1) {
          return {
              defs: __assign({}, store0.defs, store1.defs),
              instances: __assign({}, store0.instances, store1.instances)
          };
      }
      function filterEventStoreDefs(eventStore, filterFunc) {
          var defs = filterHash(eventStore.defs, filterFunc);
          var instances = filterHash(eventStore.instances, function (instance) {
              return defs[instance.defId]; // still exists?
          });
          return { defs: defs, instances: instances };
      }
  
      function parseRange(input, dateEnv) {
          var start = null;
          var 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: start, end: end };
      }
      // SIDE-EFFECT: will mutate ranges.
      // Will return a new array result.
      function invertRanges(ranges, constraintRange) {
          var invertedRanges = [];
          var start = constraintRange.start; // the end of the previous range. the start of the new range
          var i;
          var dateRange;
          // ranges need to be in order. required for our date-walking algorithm
          ranges.sort(compareRanges);
          for (i = 0; i < ranges.length; i++) {
              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: 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: 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) {
          var start = range0.start;
          var end = range0.end;
          var 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: start, end: 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 removeExact(array, exactVal) {
          var removeCnt = 0;
          var i = 0;
          while (i < array.length) {
              if (array[i] === exactVal) {
                  array.splice(i, 1);
                  removeCnt++;
              }
              else {
                  i++;
              }
          }
          return removeCnt;
      }
      function isArraysEqual(a0, a1) {
          var len = a0.length;
          var i;
          if (len !== a1.length) { // not array? or not same length?
              return false;
          }
          for (i = 0; i < len; i++) {
              if (a0[i] !== a1[i]) {
                  return false;
              }
          }
          return true;
      }
  
      function memoize(workerFunc) {
          var args;
          var res;
          return function () {
              if (!args || !isArraysEqual(args, arguments)) {
                  args = arguments;
                  res = workerFunc.apply(this, arguments);
              }
              return res;
          };
      }
      /*
      always executes the workerFunc, but if the result is equal to the previous result,
      return the previous result instead.
      */
      function memoizeOutput(workerFunc, equalityFunc) {
          var cachedRes = null;
          return function () {
              var newRes = workerFunc.apply(this, arguments);
              if (cachedRes === null || !(cachedRes === newRes || equalityFunc(cachedRes, newRes))) {
                  cachedRes = newRes;
              }
              return cachedRes;
          };
      }
  
      var EXTENDED_SETTINGS_AND_SEVERITIES = {
          week: 3,
          separator: 0,
          omitZeroMinute: 0,
          meridiem: 0,
          omitCommas: 0
      };
      var STANDARD_DATE_PROP_SEVERITIES = {
          timeZoneName: 7,
          era: 6,
          year: 5,
          month: 4,
          day: 2,
          weekday: 2,
          hour: 1,
          minute: 1,
          second: 1
      };
      var MERIDIEM_RE = /\s*([ap])\.?m\.?/i; // eats up leading spaces too
      var COMMA_RE = /,/g; // we need re for globalness
      var MULTI_SPACE_RE = /\s+/g;
      var LTR_RE = /\u200e/g; // control character
      var UTC_RE = /UTC|GMT/;
      var NativeFormatter = /** @class */ (function () {
          function NativeFormatter(formatSettings) {
              var standardDateProps = {};
              var extendedSettings = {};
              var severity = 0;
              for (var name_1 in formatSettings) {
                  if (name_1 in EXTENDED_SETTINGS_AND_SEVERITIES) {
                      extendedSettings[name_1] = formatSettings[name_1];
                      severity = Math.max(EXTENDED_SETTINGS_AND_SEVERITIES[name_1], severity);
                  }
                  else {
                      standardDateProps[name_1] = formatSettings[name_1];
                      if (name_1 in STANDARD_DATE_PROP_SEVERITIES) {
                          severity = Math.max(STANDARD_DATE_PROP_SEVERITIES[name_1], severity);
                      }
                  }
              }
              this.standardDateProps = standardDateProps;
              this.extendedSettings = extendedSettings;
              this.severity = severity;
              this.buildFormattingFunc = memoize(buildFormattingFunc);
          }
          NativeFormatter.prototype.format = function (date, context) {
              return this.buildFormattingFunc(this.standardDateProps, this.extendedSettings, context)(date);
          };
          NativeFormatter.prototype.formatRange = function (start, end, context) {
              var _a = this, standardDateProps = _a.standardDateProps, extendedSettings = _a.extendedSettings;
              var diffSeverity = computeMarkerDiffSeverity(start.marker, end.marker, context.calendarSystem);
              if (!diffSeverity) {
                  return this.format(start, context);
              }
              var 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
              }
              var full0 = this.format(start, context);
              var full1 = this.format(end, context);
              if (full0 === full1) {
                  return full0;
              }
              var partialDateProps = computePartialFormattingOptions(standardDateProps, biggestUnitForPartial);
              var partialFormattingFunc = buildFormattingFunc(partialDateProps, extendedSettings, context);
              var partial0 = partialFormattingFunc(start);
              var partial1 = partialFormattingFunc(end);
              var insertion = findCommonInsertion(full0, partial0, full1, partial1);
              var separator = extendedSettings.separator || '';
              if (insertion) {
                  return insertion.before + partial0 + separator + partial1 + insertion.after;
              }
              return full0 + separator + full1;
          };
          NativeFormatter.prototype.getLargestUnit = function () {
              switch (this.severity) {
                  case 7:
                  case 6:
                  case 5:
                      return 'year';
                  case 4:
                      return 'month';
                  case 3:
                      return 'week';
                  default:
                      return 'day';
              }
          };
          return NativeFormatter;
      }());
      function buildFormattingFunc(standardDateProps, extendedSettings, context) {
          var standardDatePropCnt = Object.keys(standardDateProps).length;
          if (standardDatePropCnt === 1 && standardDateProps.timeZoneName === 'short') {
              return function (date) {
                  return formatTimeZoneOffset(date.timeZoneOffset);
              };
          }
          if (standardDatePropCnt === 0 && extendedSettings.week) {
              return function (date) {
                  return formatWeekNumber(context.computeWeekNumber(date.marker), context.weekLabel, context.locale, extendedSettings.week);
              };
          }
          return buildNativeFormattingFunc(standardDateProps, extendedSettings, context);
      }
      function buildNativeFormattingFunc(standardDateProps, extendedSettings, context) {
          standardDateProps = __assign({}, standardDateProps); // copy
          extendedSettings = __assign({}, extendedSettings); // copy
          sanitizeSettings(standardDateProps, extendedSettings);
          standardDateProps.timeZone = 'UTC'; // we leverage the only guaranteed timeZone for our UTC markers
          var normalFormat = new Intl.DateTimeFormat(context.locale.codes, standardDateProps);
          var zeroFormat; // needed?
          if (extendedSettings.omitZeroMinute) {
              var zeroProps = __assign({}, standardDateProps);
              delete zeroProps.minute; // seconds and ms were already considered in sanitizeSettings
              zeroFormat = new Intl.DateTimeFormat(context.locale.codes, zeroProps);
          }
          return function (date) {
              var marker = date.marker;
              var format;
              if (zeroFormat && !marker.getUTCMinutes()) {
                  format = zeroFormat;
              }
              else {
                  format = normalFormat;
              }
              var 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, function (m0, m1) {
                  return m1.toLocaleLowerCase();
              });
          }
          else if (extendedSettings.meridiem === 'short') { // am/pm
              s = s.replace(MERIDIEM_RE, function (m0, m1) {
                  return m1.toLocaleLowerCase() + 'm';
              });
          }
          else if (extendedSettings.meridiem === 'lowercase') { // other meridiem transformers already converted to lowercase
              s = s.replace(MERIDIEM_RE, function (m0) {
                  return m0.toLocaleLowerCase();
              });
          }
          s = s.replace(MULTI_SPACE_RE, ' ');
          s = s.trim();
          return s;
      }
      function injectTzoStr(s, tzoStr) {
          var replaced = false;
          s = s.replace(UTC_RE, function () {
              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, weekLabel, locale, display) {
          var parts = [];
          if (display === 'narrow') {
              parts.push(weekLabel);
          }
          else if (display === 'short') {
              parts.push(weekLabel, ' ');
          }
          // otherwise, considered 'numeric'
          parts.push(locale.simpleNumberFormat.format(num));
          if (locale.options.isRtl) { // 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) {
          var partialOptions = {};
          for (var name_2 in options) {
              if (!(name_2 in STANDARD_DATE_PROP_SEVERITIES) || // not a date part prop (like timeZone)
                  STANDARD_DATE_PROP_SEVERITIES[name_2] <= biggestUnit) {
                  partialOptions[name_2] = options[name_2];
              }
          }
          return partialOptions;
      }
      function findCommonInsertion(full0, partial0, full1, partial1) {
          var i0 = 0;
          while (i0 < full0.length) {
              var found0 = full0.indexOf(partial0, i0);
              if (found0 === -1) {
                  break;
              }
              var before0 = full0.substr(0, found0);
              i0 = found0 + partial0.length;
              var after0 = full0.substr(i0);
              var i1 = 0;
              while (i1 < full1.length) {
                  var found1 = full1.indexOf(partial1, i1);
                  if (found1 === -1) {
                      break;
                  }
                  var before1 = full1.substr(0, found1);
                  i1 = found1 + partial1.length;
                  var after1 = full1.substr(i1);
                  if (before0 === before1 && after0 === after1) {
                      return {
                          before: before0,
                          after: after0
                      };
                  }
              }
          }
          return null;
      }
  
      /*
      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.
      */
      var CmdFormatter = /** @class */ (function () {
          function CmdFormatter(cmdStr, separator) {
              this.cmdStr = cmdStr;
              this.separator = separator;
          }
          CmdFormatter.prototype.format = function (date, context) {
              return context.cmdFormatter(this.cmdStr, createVerboseFormattingArg(date, null, context, this.separator));
          };
          CmdFormatter.prototype.formatRange = function (start, end, context) {
              return context.cmdFormatter(this.cmdStr, createVerboseFormattingArg(start, end, context, this.separator));
          };
          return CmdFormatter;
      }());
  
      var FuncFormatter = /** @class */ (function () {
          function FuncFormatter(func) {
              this.func = func;
          }
          FuncFormatter.prototype.format = function (date, context) {
              return this.func(createVerboseFormattingArg(date, null, context));
          };
          FuncFormatter.prototype.formatRange = function (start, end, context) {
              return this.func(createVerboseFormattingArg(start, end, context));
          };
          return FuncFormatter;
      }());
  
      // Formatter Object Creation
      function createFormatter(input, defaultSeparator) {
          if (typeof input === 'object' && input) { // non-null object
              if (typeof defaultSeparator === 'string') {
                  input = __assign({ separator: defaultSeparator }, input);
              }
              return new NativeFormatter(input);
          }
          else if (typeof input === 'string') {
              return new CmdFormatter(input, defaultSeparator);
          }
          else if (typeof input === 'function') {
              return new FuncFormatter(input);
          }
      }
      // String Utils
      // timeZoneOffset is in minutes
      function buildIsoString(marker, timeZoneOffset, stripZeroTime) {
          if (stripZeroTime === void 0) { stripZeroTime = false; }
          var 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;
      }
      function formatIsoTimeString(marker) {
          return padStart(marker.getUTCHours(), 2) + ':' +
              padStart(marker.getUTCMinutes(), 2) + ':' +
              padStart(marker.getUTCSeconds(), 2);
      }
      function formatTimeZoneOffset(minutes, doIso) {
          if (doIso === void 0) { doIso = false; }
          var sign = minutes < 0 ? '-' : '+';
          var abs = Math.abs(minutes);
          var hours = Math.floor(abs / 60);
          var mins = Math.round(abs % 60);
          if (doIso) {
              return sign + padStart(hours, 2) + ':' + padStart(mins, 2);
          }
          else {
              return 'GMT' + sign + hours + (mins ? ':' + padStart(mins, 2) : '');
          }
      }
      // Arg Utils
      function createVerboseFormattingArg(start, end, context, separator) {
          var startInfo = expandZonedMarker(start, context.calendarSystem);
          var endInfo = end ? expandZonedMarker(end, context.calendarSystem) : null;
          return {
              date: startInfo,
              start: startInfo,
              end: endInfo,
              timeZone: context.timeZone,
              localeCodes: context.locale.codes,
              separator: separator
          };
      }
      function expandZonedMarker(dateInfo, calendarSystem) {
          var 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]
          };
      }
  
      var EventSourceApi = /** @class */ (function () {
          function EventSourceApi(calendar, internalEventSource) {
              this.calendar = calendar;
              this.internalEventSource = internalEventSource;
          }
          EventSourceApi.prototype.remove = function () {
              this.calendar.dispatch({
                  type: 'REMOVE_EVENT_SOURCE',
                  sourceId: this.internalEventSource.sourceId
              });
          };
          EventSourceApi.prototype.refetch = function () {
              this.calendar.dispatch({
                  type: 'FETCH_EVENT_SOURCES',
                  sourceIds: [this.internalEventSource.sourceId]
              });
          };
          Object.defineProperty(EventSourceApi.prototype, "id", {
              get: function () {
                  return this.internalEventSource.publicId;
              },
              enumerable: true,
              configurable: true
          });
          Object.defineProperty(EventSourceApi.prototype, "url", {
              // only relevant to json-feed event sources
              get: function () {
                  return this.internalEventSource.meta.url;
              },
              enumerable: true,
              configurable: true
          });
          return EventSourceApi;
      }());
  
      var EventApi = /** @class */ (function () {
          function EventApi(calendar, def, instance) {
              this._calendar = calendar;
              this._def = def;
              this._instance = instance || null;
          }
          /*
          TODO: make event struct more responsible for this
          */
          EventApi.prototype.setProp = function (name, val) {
              var _a, _b;
              if (name in DATE_PROPS) ;
              else if (name in NON_DATE_PROPS) {
                  if (typeof NON_DATE_PROPS[name] === 'function') {
                      val = NON_DATE_PROPS[name](val);
                  }
                  this.mutate({
                      standardProps: (_a = {}, _a[name] = val, _a)
                  });
              }
              else if (name in UNSCOPED_EVENT_UI_PROPS) {
                  var ui = void 0;
                  if (typeof UNSCOPED_EVENT_UI_PROPS[name] === 'function') {
                      val = UNSCOPED_EVENT_UI_PROPS[name](val);
                  }
                  if (name === 'color') {
                      ui = { backgroundColor: val, borderColor: val };
                  }
                  else if (name === 'editable') {
                      ui = { startEditable: val, durationEditable: val };
                  }
                  else {
                      ui = (_b = {}, _b[name] = val, _b);
                  }
                  this.mutate({
                      standardProps: { ui: ui }
                  });
              }
          };
          EventApi.prototype.setExtendedProp = function (name, val) {
              var _a;
              this.mutate({
                  extendedProps: (_a = {}, _a[name] = val, _a)
              });
          };
          EventApi.prototype.setStart = function (startInput, options) {
              if (options === void 0) { options = {}; }
              var dateEnv = this._calendar.dateEnv;
              var start = dateEnv.createMarker(startInput);
              if (start && this._instance) { // TODO: warning if parsed bad
                  var instanceRange = this._instance.range;
                  var startDelta = diffDates(instanceRange.start, start, dateEnv, options.granularity); // what if parsed bad!?
                  if (options.maintainDuration) {
                      this.mutate({ datesDelta: startDelta });
                  }
                  else {
                      this.mutate({ startDelta: startDelta });
                  }
              }
          };
          EventApi.prototype.setEnd = function (endInput, options) {
              if (options === void 0) { options = {}; }
              var dateEnv = this._calendar.dateEnv;
              var end;
              if (endInput != null) {
                  end = dateEnv.createMarker(endInput);
                  if (!end) {
                      return; // TODO: warning if parsed bad
                  }
              }
              if (this._instance) {
                  if (end) {
                      var endDelta = diffDates(this._instance.range.end, end, dateEnv, options.granularity);
                      this.mutate({ endDelta: endDelta });
                  }
                  else {
                      this.mutate({ standardProps: { hasEnd: false } });
                  }
              }
          };
          EventApi.prototype.setDates = function (startInput, endInput, options) {
              if (options === void 0) { options = {}; }
              var dateEnv = this._calendar.dateEnv;
              var standardProps = { allDay: options.allDay };
              var start = dateEnv.createMarker(startInput);
              var 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) {
                  var 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);
                  }
                  var startDelta = diffDates(instanceRange.start, start, dateEnv, options.granularity);
                  if (end) {
                      var endDelta = diffDates(instanceRange.end, end, dateEnv, options.granularity);
                      if (durationsEqual(startDelta, endDelta)) {
                          this.mutate({ datesDelta: startDelta, standardProps: standardProps });
                      }
                      else {
                          this.mutate({ startDelta: startDelta, endDelta: endDelta, standardProps: standardProps });
                      }
                  }
                  else { // means "clear the end"
                      standardProps.hasEnd = false;
                      this.mutate({ datesDelta: startDelta, standardProps: standardProps });
                  }
              }
          };
          EventApi.prototype.moveStart = function (deltaInput) {
              var delta = createDuration(deltaInput);
              if (delta) { // TODO: warning if parsed bad
                  this.mutate({ startDelta: delta });
              }
          };
          EventApi.prototype.moveEnd = function (deltaInput) {
              var delta = createDuration(deltaInput);
              if (delta) { // TODO: warning if parsed bad
                  this.mutate({ endDelta: delta });
              }
          };
          EventApi.prototype.moveDates = function (deltaInput) {
              var delta = createDuration(deltaInput);
              if (delta) { // TODO: warning if parsed bad
                  this.mutate({ datesDelta: delta });
              }
          };
          EventApi.prototype.setAllDay = function (allDay, options) {
              if (options === void 0) { options = {}; }
              var standardProps = { allDay: allDay };
              var maintainDuration = options.maintainDuration;
              if (maintainDuration == null) {
                  maintainDuration = this._calendar.opt('allDayMaintainDuration');
              }
              if (this._def.allDay !== allDay) {
                  standardProps.hasEnd = maintainDuration;
              }
              this.mutate({ standardProps: standardProps });
          };
          EventApi.prototype.formatRange = function (formatInput) {
              var dateEnv = this._calendar.dateEnv;
              var instance = this._instance;
              var formatter = createFormatter(formatInput, this._calendar.opt('defaultRangeSeparator'));
              if (this._def.hasEnd) {
                  return dateEnv.formatRange(instance.range.start, instance.range.end, formatter, {
                      forcedStartTzo: instance.forcedStartTzo,
                      forcedEndTzo: instance.forcedEndTzo
                  });
              }
              else {
                  return dateEnv.format(instance.range.start, formatter, {
                      forcedTzo: instance.forcedStartTzo
                  });
              }
          };
          EventApi.prototype.mutate = function (mutation) {
              var def = this._def;
              var instance = this._instance;
              if (instance) {
                  this._calendar.dispatch({
                      type: 'MUTATE_EVENTS',
                      instanceId: instance.instanceId,
                      mutation: mutation,
                      fromApi: true
                  });
                  var eventStore = this._calendar.state.eventStore;
                  this._def = eventStore.defs[def.defId];
                  this._instance = eventStore.instances[instance.instanceId];
              }
          };
          EventApi.prototype.remove = function () {
              this._calendar.dispatch({
                  type: 'REMOVE_EVENT_DEF',
                  defId: this._def.defId
              });
          };
          Object.defineProperty(EventApi.prototype, "source", {
              get: function () {
                  var sourceId = this._def.sourceId;
                  if (sourceId) {
                      return new EventSourceApi(this._calendar, this._calendar.state.eventSources[sourceId]);
                  }
                  return null;
              },
              enumerable: true,
              configurable: true
          });
          Object.defineProperty(EventApi.prototype, "start", {
              get: function () {
                  return this._instance ?
                      this._calendar.dateEnv.toDate(this._instance.range.start) :
                      null;
              },
              enumerable: true,
              configurable: true
          });
          Object.defineProperty(EventApi.prototype, "end", {
              get: function () {
                  return (this._instance && this._def.hasEnd) ?
                      this._calendar.dateEnv.toDate(this._instance.range.end) :
                      null;
              },
              enumerable: true,
              configurable: true
          });
          Object.defineProperty(EventApi.prototype, "id", {
              // computable props that all access the def
              // TODO: find a TypeScript-compatible way to do this at scale
              get: function () { return this._def.publicId; },
              enumerable: true,
              configurable: true
          });
          Object.defineProperty(EventApi.prototype, "groupId", {
              get: function () { return this._def.groupId; },
              enumerable: true,
              configurable: true
          });
          Object.defineProperty(EventApi.prototype, "allDay", {
              get: function () { return this._def.allDay; },
              enumerable: true,
              configurable: true
          });
          Object.defineProperty(EventApi.prototype, "title", {
              get: function () { return this._def.title; },
              enumerable: true,
              configurable: true
          });
          Object.defineProperty(EventApi.prototype, "url", {
              get: function () { return this._def.url; },
              enumerable: true,
              configurable: true
          });
          Object.defineProperty(EventApi.prototype, "rendering", {
              get: function () { return this._def.rendering; },
              enumerable: true,
              configurable: true
          });
          Object.defineProperty(EventApi.prototype, "startEditable", {
              get: function () { return this._def.ui.startEditable; },
              enumerable: true,
              configurable: true
          });
          Object.defineProperty(EventApi.prototype, "durationEditable", {
              get: function () { return this._def.ui.durationEditable; },
              enumerable: true,
              configurable: true
          });
          Object.defineProperty(EventApi.prototype, "constraint", {
              get: function () { return this._def.ui.constraints[0] || null; },
              enumerable: true,
              configurable: true
          });
          Object.defineProperty(EventApi.prototype, "overlap", {
              get: function () { return this._def.ui.overlap; },
              enumerable: true,
              configurable: true
          });
          Object.defineProperty(EventApi.prototype, "allow", {
              get: function () { return this._def.ui.allows[0] || null; },
              enumerable: true,
              configurable: true
          });
          Object.defineProperty(EventApi.prototype, "backgroundColor", {
              get: function () { return this._def.ui.backgroundColor; },
              enumerable: true,
              configurable: true
          });
          Object.defineProperty(EventApi.prototype, "borderColor", {
              get: function () { return this._def.ui.borderColor; },
              enumerable: true,
              configurable: true
          });
          Object.defineProperty(EventApi.prototype, "textColor", {
              get: function () { return this._def.ui.textColor; },
              enumerable: true,
              configurable: true
          });
          Object.defineProperty(EventApi.prototype, "classNames", {
              // NOTE: user can't modify these because Object.freeze was called in event-def parsing
              get: function () { return this._def.ui.classNames; },
              enumerable: true,
              configurable: true
          });
          Object.defineProperty(EventApi.prototype, "extendedProps", {
              get: function () { return this._def.extendedProps; },
              enumerable: true,
              configurable: true
          });
          return EventApi;
      }());
  
      /*
      Specifying nextDayThreshold signals that all-day ranges should be sliced.
      */
      function sliceEventStore(eventStore, eventUiBases, framingRange, nextDayThreshold) {
          var inverseBgByGroupId = {};
          var inverseBgByDefId = {};
          var defByGroupId = {};
          var bgRanges = [];
          var fgRanges = [];
          var eventUis = compileEventUis(eventStore.defs, eventUiBases);
          for (var defId in eventStore.defs) {
              var def = eventStore.defs[defId];
              if (def.rendering === 'inverse-background') {
                  if (def.groupId) {
                      inverseBgByGroupId[def.groupId] = [];
                      if (!defByGroupId[def.groupId]) {
                          defByGroupId[def.groupId] = def;
                      }
                  }
                  else {
                      inverseBgByDefId[defId] = [];
                  }
              }
          }
          for (var instanceId in eventStore.instances) {
              var instance = eventStore.instances[instanceId];
              var def = eventStore.defs[instance.defId];
              var ui = eventUis[def.defId];
              var origRange = instance.range;
              var normalRange = (!def.allDay && nextDayThreshold) ?
                  computeVisibleDayRange(origRange, nextDayThreshold) :
                  origRange;
              var slicedRange = intersectRanges(normalRange, framingRange);
              if (slicedRange) {
                  if (def.rendering === 'inverse-background') {
                      if (def.groupId) {
                          inverseBgByGroupId[def.groupId].push(slicedRange);
                      }
                      else {
                          inverseBgByDefId[instance.defId].push(slicedRange);
                      }
                  }
                  else {
                      (def.rendering === 'background' ? bgRanges : fgRanges).push({
                          def: def,
                          ui: ui,
                          instance: instance,
                          range: slicedRange,
                          isStart: normalRange.start && normalRange.start.valueOf() === slicedRange.start.valueOf(),
                          isEnd: normalRange.end && normalRange.end.valueOf() === slicedRange.end.valueOf()
                      });
                  }
              }
          }
          for (var groupId in inverseBgByGroupId) { // BY GROUP
              var ranges = inverseBgByGroupId[groupId];
              var invertedRanges = invertRanges(ranges, framingRange);
              for (var _i = 0, invertedRanges_1 = invertedRanges; _i < invertedRanges_1.length; _i++) {
                  var invertedRange = invertedRanges_1[_i];
                  var def = defByGroupId[groupId];
                  var ui = eventUis[def.defId];
                  bgRanges.push({
                      def: def,
                      ui: ui,
                      instance: null,
                      range: invertedRange,
                      isStart: false,
                      isEnd: false
                  });
              }
          }
          for (var defId in inverseBgByDefId) {
              var ranges = inverseBgByDefId[defId];
              var invertedRanges = invertRanges(ranges, framingRange);
              for (var _a = 0, invertedRanges_2 = invertedRanges; _a < invertedRanges_2.length; _a++) {
                  var invertedRange = invertedRanges_2[_a];
                  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.rendering === 'background' || def.rendering === 'inverse-background';
      }
      function filterSegsViaEls(context, segs, isMirror) {
          var calendar = context.calendar, view = context.view;
          if (calendar.hasPublicHandlers('eventRender')) {
              segs = segs.filter(function (seg) {
                  var custom = calendar.publiclyTrigger('eventRender', [
                      {
                          event: new EventApi(calendar, seg.eventRange.def, seg.eventRange.instance),
                          isMirror: isMirror,
                          isStart: seg.isStart,
                          isEnd: seg.isEnd,
                          // TODO: include seg.range once all components consistently generate it
                          el: seg.el,
                          view: view
                      }
                  ]);
                  if (custom === false) { // means don't render at all
                      return false;
                  }
                  else if (custom && custom !== true) {
                      seg.el = custom;
                  }
                  return true;
              });
          }
          for (var _i = 0, segs_1 = segs; _i < segs_1.length; _i++) {
              var seg = segs_1[_i];
              setElSeg(seg.el, seg);
          }
          return segs;
      }
      function setElSeg(el, seg) {
          el.fcSeg = seg;
      }
      function getElSeg(el) {
          return el.fcSeg || null;
      }
      // event ui computation
      function compileEventUis(eventDefs, eventUiBases) {
          return mapHash(eventDefs, function (eventDef) {
              return compileEventUi(eventDef, eventUiBases);
          });
      }
      function compileEventUi(eventDef, eventUiBases) {
          var uis = [];
          if (eventUiBases['']) {
              uis.push(eventUiBases['']);
          }
          if (eventUiBases[eventDef.defId]) {
              uis.push(eventUiBases[eventDef.defId]);
          }
          uis.push(eventDef.ui);
          return combineEventUis(uis);
      }
      // triggers
      function triggerRenderedSegs(context, segs, isMirrors) {
          var calendar = context.calendar, view = context.view;
          if (calendar.hasPublicHandlers('eventPositioned')) {
              for (var _i = 0, segs_2 = segs; _i < segs_2.length; _i++) {
                  var seg = segs_2[_i];
                  calendar.publiclyTriggerAfterSizing('eventPositioned', [
                      {
                          event: new EventApi(calendar, seg.eventRange.def, seg.eventRange.instance),
                          isMirror: isMirrors,
                          isStart: seg.isStart,
                          isEnd: seg.isEnd,
                          el: seg.el,
                          view: view
                      }
                  ]);
              }
          }
          if (!calendar.state.eventSourceLoadingLevel) { // avoid initial empty state while pending
              calendar.afterSizingTriggers._eventsPositioned = [null]; // fire once
          }
      }
      function triggerWillRemoveSegs(context, segs, isMirrors) {
          var calendar = context.calendar, view = context.view;
          for (var _i = 0, segs_3 = segs; _i < segs_3.length; _i++) {
              var seg = segs_3[_i];
              calendar.trigger('eventElRemove', seg.el);
          }
          if (calendar.hasPublicHandlers('eventDestroy')) {
              for (var _a = 0, segs_4 = segs; _a < segs_4.length; _a++) {
                  var seg = segs_4[_a];
                  calendar.publiclyTrigger('eventDestroy', [
                      {
                          event: new EventApi(calendar, seg.eventRange.def, seg.eventRange.instance),
                          isMirror: isMirrors,
                          el: seg.el,
                          view: view
                      }
                  ]);
              }
          }
      }
      // is-interactable
      function computeEventDraggable(context, eventDef, eventUi) {
          var calendar = context.calendar, view = context.view;
          var transformers = calendar.pluginSystem.hooks.isDraggableTransformers;
          var val = eventUi.startEditable;
          for (var _i = 0, transformers_1 = transformers; _i < transformers_1.length; _i++) {
              var transformer = transformers_1[_i];
              val = transformer(val, eventDef, eventUi, view);
          }
          return val;
      }
      function computeEventStartResizable(context, eventDef, eventUi) {
          return eventUi.durationEditable && context.options.eventResizableFromStart;
      }
      function computeEventEndResizable(context, eventDef, eventUi) {
          return eventUi.durationEditable;
      }
  
      // applies the mutation to ALL defs/instances within the event store
      function applyMutationToEventStore(eventStore, eventConfigBase, mutation, calendar) {
          var eventConfigs = compileEventUis(eventStore.defs, eventConfigBase);
          var dest = createEmptyEventStore();
          for (var defId in eventStore.defs) {
              var def = eventStore.defs[defId];
              dest.defs[defId] = applyMutationToEventDef(def, eventConfigs[defId], mutation, calendar.pluginSystem.hooks.eventDefMutationAppliers, calendar);
          }
          for (var instanceId in eventStore.instances) {
              var instance = eventStore.instances[instanceId];
              var def = dest.defs[instance.defId]; // important to grab the newly modified def
              dest.instances[instanceId] = applyMutationToEventInstance(instance, def, eventConfigs[instance.defId], mutation, calendar);
          }
          return dest;
      }
      function applyMutationToEventDef(eventDef, eventConfig, mutation, appliers, calendar) {
          var 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?
          }
          var copy = __assign({}, eventDef, standardProps, { ui: __assign({}, eventDef.ui, standardProps.ui) });
          if (mutation.extendedProps) {
              copy.extendedProps = __assign({}, copy.extendedProps, mutation.extendedProps);
          }
          for (var _i = 0, appliers_1 = appliers; _i < appliers_1.length; _i++) {
              var applier = appliers_1[_i];
              applier(copy, mutation, calendar);
          }
          if (!copy.hasEnd && calendar.opt('forceEventDuration')) {
              copy.hasEnd = true;
          }
          return copy;
      }
      function applyMutationToEventInstance(eventInstance, eventDef, // must first be modified by applyMutationToEventDef
      eventConfig, mutation, calendar) {
          var dateEnv = calendar.dateEnv;
          var forceAllDay = mutation.standardProps && mutation.standardProps.allDay === true;
          var clearEnd = mutation.standardProps && mutation.standardProps.hasEnd === false;
          var copy = __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: calendar.getDefaultEventEnd(eventDef.allDay, copy.range.start)
              };
          }
          // 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 = calendar.getDefaultEventEnd(eventDef.allDay, copy.range.start);
          }
          return copy;
      }
  
      function reduceEventStore (eventStore, action, eventSources, dateProfile, calendar) {
          switch (action.type) {
              case 'RECEIVE_EVENTS': // raw
                  return receiveRawEvents(eventStore, eventSources[action.sourceId], action.fetchId, action.fetchRange, action.rawEvents, calendar);
              case 'ADD_EVENTS': // already parsed, but not expanded
                  return addEvent(eventStore, action.eventStore, // new ones
                  dateProfile ? dateProfile.activeRange : null, calendar);
              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 'SET_DATE':
              case 'SET_VIEW_TYPE':
                  if (dateProfile) {
                      return expandRecurring(eventStore, dateProfile.activeRange, calendar);
                  }
                  else {
                      return eventStore;
                  }
              case 'CHANGE_TIMEZONE':
                  return rezoneDates(eventStore, action.oldDateEnv, calendar.dateEnv);
              case 'MUTATE_EVENTS':
                  return applyMutationToRelated(eventStore, action.instanceId, action.mutation, action.fromApi, calendar);
              case 'REMOVE_EVENT_INSTANCES':
                  return excludeInstances(eventStore, action.instances);
              case 'REMOVE_EVENT_DEF':
                  return filterEventStoreDefs(eventStore, function (eventDef) {
                      return eventDef.defId !== action.defId;
                  });
              case 'REMOVE_EVENT_SOURCE':
                  return excludeEventsBySourceId(eventStore, action.sourceId);
              case 'REMOVE_ALL_EVENT_SOURCES':
                  return filterEventStoreDefs(eventStore, function (eventDef) {
                      return !eventDef.sourceId; // only keep events with no source id
                  });
              case 'REMOVE_ALL_EVENTS':
                  return createEmptyEventStore();
              case 'RESET_EVENTS':
                  return {
                      defs: eventStore.defs,
                      instances: eventStore.instances
                  };
              default:
                  return eventStore;
          }
      }
      function receiveRawEvents(eventStore, eventSource, fetchId, fetchRange, rawEvents, calendar) {
          if (eventSource && // not already removed
              fetchId === eventSource.latestFetchId // TODO: wish this logic was always in event-sources
          ) {
              var subset = parseEvents(transformRawEvents(rawEvents, eventSource, calendar), eventSource.sourceId, calendar);
              if (fetchRange) {
                  subset = expandRecurring(subset, fetchRange, calendar);
              }
              return mergeEventStores(excludeEventsBySourceId(eventStore, eventSource.sourceId), subset);
          }
          return eventStore;
      }
      function addEvent(eventStore, subset, expandRange, calendar) {
          if (expandRange) {
              subset = expandRecurring(subset, expandRange, calendar);
          }
          return mergeEventStores(eventStore, subset);
      }
      function rezoneDates(eventStore, oldDateEnv, newDateEnv) {
          var defs = eventStore.defs;
          var instances = mapHash(eventStore.instances, function (instance) {
              var def = defs[instance.defId];
              if (def.allDay || def.recurringDef) {
                  return instance; // isn't dependent on timezone
              }
              else {
                  return __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: defs, instances: instances };
      }
      function applyMutationToRelated(eventStore, instanceId, mutation, fromApi, calendar) {
          var relevant = getRelevantEvents(eventStore, instanceId);
          var eventConfigBase = fromApi ?
              { '': {
                      startEditable: true,
                      durationEditable: true,
                      constraints: [],
                      overlap: null,
                      allows: [],
                      backgroundColor: '',
                      borderColor: '',
                      textColor: '',
                      classNames: []
                  } } :
              calendar.eventUiBases;
          relevant = applyMutationToEventStore(relevant, eventConfigBase, mutation, calendar);
          return mergeEventStores(eventStore, relevant);
      }
      function excludeEventsBySourceId(eventStore, sourceId) {
          return filterEventStoreDefs(eventStore, function (eventDef) {
              return 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, function (instance) {
                  return !removals[instance.instanceId];
              })
          };
      }
  
      // high-level segmenting-aware tester functions
      // ------------------------------------------------------------------------------------------------------------------------
      function isInteractionValid(interaction, calendar) {
          return isNewPropsValid({ eventDrag: interaction }, calendar); // HACK: the eventDrag props is used for ALL interactions
      }
      function isDateSelectionValid(dateSelection, calendar) {
          return isNewPropsValid({ dateSelection: dateSelection }, calendar);
      }
      function isNewPropsValid(newProps, calendar) {
          var view = calendar.view;
          var props = __assign({ businessHours: view ? view.props.businessHours : createEmptyEventStore(), dateSelection: '', eventStore: calendar.state.eventStore, eventUiBases: calendar.eventUiBases, eventSelection: '', eventDrag: null, eventResize: null }, newProps);
          return (calendar.pluginSystem.hooks.isPropsValid || isPropsValid)(props, calendar);
      }
      function isPropsValid(state, calendar, dateSpanMeta, filterConfig) {
          if (dateSpanMeta === void 0) { dateSpanMeta = {}; }
          if (state.eventDrag && !isInteractionPropsValid(state, calendar, dateSpanMeta, filterConfig)) {
              return false;
          }
          if (state.dateSelection && !isDateSelectionPropsValid(state, calendar, dateSpanMeta, filterConfig)) {
              return false;
          }
          return true;
      }
      // Moving Event Validation
      // ------------------------------------------------------------------------------------------------------------------------
      function isInteractionPropsValid(state, calendar, dateSpanMeta, filterConfig) {
          var interaction = state.eventDrag; // HACK: the eventDrag props is used for ALL interactions
          var subjectEventStore = interaction.mutatedEvents;
          var subjectDefs = subjectEventStore.defs;
          var subjectInstances = subjectEventStore.instances;
          var subjectConfigs = compileEventUis(subjectDefs, interaction.isEvent ?
              state.eventUiBases :
              { '': calendar.selectionConfig } // if not a real event, validate as a selection
          );
          if (filterConfig) {
              subjectConfigs = mapHash(subjectConfigs, filterConfig);
          }
          var otherEventStore = excludeInstances(state.eventStore, interaction.affectedEvents.instances); // exclude the subject events. TODO: exclude defs too?
          var otherDefs = otherEventStore.defs;
          var otherInstances = otherEventStore.instances;
          var otherConfigs = compileEventUis(otherDefs, state.eventUiBases);
          for (var subjectInstanceId in subjectInstances) {
              var subjectInstance = subjectInstances[subjectInstanceId];
              var subjectRange = subjectInstance.range;
              var subjectConfig = subjectConfigs[subjectInstance.defId];
              var subjectDef = subjectDefs[subjectInstance.defId];
              // constraint
              if (!allConstraintsPass(subjectConfig.constraints, subjectRange, otherEventStore, state.businessHours, calendar)) {
                  return false;
              }
              // overlap
              var overlapFunc = calendar.opt('eventOverlap');
              if (typeof overlapFunc !== 'function') {
                  overlapFunc = null;
              }
              for (var otherInstanceId in otherInstances) {
                  var otherInstance = otherInstances[otherInstanceId];
                  // intersect! evaluate
                  if (rangesIntersect(subjectRange, otherInstance.range)) {
                      var 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 (overlapFunc && !overlapFunc(new EventApi(calendar, otherDefs[otherInstance.defId], otherInstance), // still event
                      new EventApi(calendar, subjectDef, subjectInstance) // moving event
                      )) {
                          return false;
                      }
                  }
              }
              // allow (a function)
              var calendarEventStore = calendar.state.eventStore; // need global-to-calendar, not local to component (splittable)state
              for (var _i = 0, _a = subjectConfig.allows; _i < _a.length; _i++) {
                  var subjectAllow = _a[_i];
                  var subjectDateSpan = __assign({}, dateSpanMeta, { range: subjectInstance.range, allDay: subjectDef.allDay });
                  var origDef = calendarEventStore.defs[subjectDef.defId];
                  var origInstance = calendarEventStore.instances[subjectInstanceId];
                  var eventApi = void 0;
                  if (origDef) { // was previously in the calendar
                      eventApi = new EventApi(calendar, origDef, origInstance);
                  }
                  else { // was an external event
                      eventApi = new EventApi(calendar, subjectDef); // no instance, because had no dates
                  }
                  if (!subjectAllow(calendar.buildDateSpanApi(subjectDateSpan), eventApi)) {
                      return false;
                  }
              }
          }
          return true;
      }
      // Date Selection Validation
      // ------------------------------------------------------------------------------------------------------------------------
      function isDateSelectionPropsValid(state, calendar, dateSpanMeta, filterConfig) {
          var relevantEventStore = state.eventStore;
          var relevantDefs = relevantEventStore.defs;
          var relevantInstances = relevantEventStore.instances;
          var selection = state.dateSelection;
          var selectionRange = selection.range;
          var selectionConfig = calendar.selectionConfig;
          if (filterConfig) {
              selectionConfig = filterConfig(selectionConfig);
          }
          // constraint
          if (!allConstraintsPass(selectionConfig.constraints, selectionRange, relevantEventStore, state.businessHours, calendar)) {
              return false;
          }
          // overlap
          var overlapFunc = calendar.opt('selectOverlap');
          if (typeof overlapFunc !== 'function') {
              overlapFunc = null;
          }
          for (var relevantInstanceId in relevantInstances) {
              var relevantInstance = relevantInstances[relevantInstanceId];
              // intersect! evaluate
              if (rangesIntersect(selectionRange, relevantInstance.range)) {
                  if (selectionConfig.overlap === false) {
                      return false;
                  }
                  if (overlapFunc && !overlapFunc(new EventApi(calendar, relevantDefs[relevantInstance.defId], relevantInstance))) {
                      return false;
                  }
              }
          }
          // allow (a function)
          for (var _i = 0, _a = selectionConfig.allows; _i < _a.length; _i++) {
              var selectionAllow = _a[_i];
              var fullDateSpan = __assign({}, dateSpanMeta, selection);
              if (!selectionAllow(calendar.buildDateSpanApi(fullDateSpan), null)) {
                  return false;
              }
          }
          return true;
      }
      // Constraint Utils
      // ------------------------------------------------------------------------------------------------------------------------
      function allConstraintsPass(constraints, subjectRange, otherEventStore, businessHoursUnexpanded, calendar) {
          for (var _i = 0, constraints_1 = constraints; _i < constraints_1.length; _i++) {
              var constraint = constraints_1[_i];
              if (!anyRangesContainRange(constraintToRanges(constraint, subjectRange, otherEventStore, businessHoursUnexpanded, calendar), 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'
      calendar // for expanding businesshours
      ) {
          if (constraint === 'businessHours') {
              return eventStoreToRanges(expandRecurring(businessHoursUnexpanded, subjectRange, calendar));
          }
          else if (typeof constraint === 'string') { // an group ID
              return eventStoreToRanges(filterEventStoreDefs(otherEventStore, function (eventDef) {
                  return eventDef.groupId === constraint;
              }));
          }
          else if (typeof constraint === 'object' && constraint) { // non-null object
              return eventStoreToRanges(expandRecurring(constraint, subjectRange, calendar));
          }
          return []; // if it's false
      }
      // TODO: move to event-store file?
      function eventStoreToRanges(eventStore) {
          var instances = eventStore.instances;
          var ranges = [];
          for (var instanceId in instances) {
              ranges.push(instances[instanceId].range);
          }
          return ranges;
      }
      // TODO: move to geom file?
      function anyRangesContainRange(outerRanges, innerRange) {
          for (var _i = 0, outerRanges_1 = outerRanges; _i < outerRanges_1.length; _i++) {
              var outerRange = outerRanges_1[_i];
              if (rangeContainsRange(outerRange, innerRange)) {
                  return true;
              }
          }
          return false;
      }
      // Parsing
      // ------------------------------------------------------------------------------------------------------------------------
      function normalizeConstraint(input, calendar) {
          if (Array.isArray(input)) {
              return parseEvents(input, '', calendar, true); // allowOpenRange=true
          }
          else if (typeof input === 'object' && input) { // non-null object
              return parseEvents([input], '', calendar, true); // allowOpenRange=true
          }
          else if (input != null) {
              return String(input);
          }
          else {
              return null;
          }
      }
  
      function htmlEscape(s) {
          return (s + '').replace(/&/g, '&amp;')
              .replace(/</g, '&lt;')
              .replace(/>/g, '&gt;')
              .replace(/'/g, '&#039;')
              .replace(/"/g, '&quot;')
              .replace(/\n/g, '<br />');
      }
      // Given a hash of CSS properties, returns a string of CSS.
      // Uses property names as-is (no camel-case conversion). Will not make statements for null/undefined values.
      function cssToStr(cssProps) {
          var statements = [];
          for (var name_1 in cssProps) {
              var val = cssProps[name_1];
              if (val != null && val !== '') {
                  statements.push(name_1 + ':' + val);
              }
          }
          return statements.join(';');
      }
      // Given an object hash of HTML attribute names to values,
      // generates a string that can be injected between < > in HTML
      function attrsToStr(attrs) {
          var parts = [];
          for (var name_2 in attrs) {
              var val = attrs[name_2];
              if (val != null) {
                  parts.push(name_2 + '="' + htmlEscape(val) + '"');
              }
          }
          return parts.join(' ');
      }
      function parseClassName(raw) {
          if (Array.isArray(raw)) {
              return raw;
          }
          else if (typeof raw === 'string') {
              return raw.split(/\s+/);
          }
          else {
              return [];
          }
      }
  
      var UNSCOPED_EVENT_UI_PROPS = {
          editable: Boolean,
          startEditable: Boolean,
          durationEditable: Boolean,
          constraint: null,
          overlap: null,
          allow: null,
          className: parseClassName,
          classNames: parseClassName,
          color: String,
          backgroundColor: String,
          borderColor: String,
          textColor: String
      };
      function processUnscopedUiProps(rawProps, calendar, leftovers) {
          var props = refineProps(rawProps, UNSCOPED_EVENT_UI_PROPS, {}, leftovers);
          var constraint = normalizeConstraint(props.constraint, calendar);
          return {
              startEditable: props.startEditable != null ? props.startEditable : props.editable,
              durationEditable: props.durationEditable != null ? props.durationEditable : props.editable,
              constraints: constraint != null ? [constraint] : [],
              overlap: props.overlap,
              allows: props.allow != null ? [props.allow] : [],
              backgroundColor: props.backgroundColor || props.color,
              borderColor: props.borderColor || props.color,
              textColor: props.textColor,
              classNames: props.classNames.concat(props.className)
          };
      }
      function processScopedUiProps(prefix, rawScoped, calendar, leftovers) {
          var rawUnscoped = {};
          var wasFound = {};
          for (var key in UNSCOPED_EVENT_UI_PROPS) {
              var scopedKey = prefix + capitaliseFirstLetter(key);
              rawUnscoped[key] = rawScoped[scopedKey];
              wasFound[scopedKey] = true;
          }
          if (prefix === 'event') {
              rawUnscoped.editable = rawScoped.editable; // special case. there is no 'eventEditable', just 'editable'
          }
          if (leftovers) {
              for (var key in rawScoped) {
                  if (!wasFound[key]) {
                      leftovers[key] = rawScoped[key];
                  }
              }
          }
          return processUnscopedUiProps(rawUnscoped, calendar);
      }
      var EMPTY_EVENT_UI = {
          startEditable: null,
          durationEditable: null,
          constraints: [],
          overlap: null,
          allows: [],
          backgroundColor: '',
          borderColor: '',
          textColor: '',
          classNames: []
      };
      // prevent against problems with <2 args!
      function combineEventUis(uis) {
          return uis.reduce(combineTwoEventUis, EMPTY_EVENT_UI);
      }
      function combineTwoEventUis(item0, item1) {
          return {
              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)
          };
      }
  
      var NON_DATE_PROPS = {
          id: String,
          groupId: String,
          title: String,
          url: String,
          rendering: String,
          extendedProps: null
      };
      var DATE_PROPS = {
          start: null,
          date: null,
          end: null,
          allDay: null
      };
      var uid = 0;
      function parseEvent(raw, sourceId, calendar, allowOpenRange) {
          var allDayDefault = computeIsAllDayDefault(sourceId, calendar);
          var leftovers0 = {};
          var recurringRes = parseRecurring(raw, // raw, but with single-event stuff stripped out
          allDayDefault, calendar.dateEnv, calendar.pluginSystem.hooks.recurringTypes, leftovers0 // will populate with non-recurring props
          );
          if (recurringRes) {
              var def = parseEventDef(leftovers0, sourceId, recurringRes.allDay, Boolean(recurringRes.duration), calendar);
              def.recurringDef = {
                  typeId: recurringRes.typeId,
                  typeData: recurringRes.typeData,
                  duration: recurringRes.duration
              };
              return { def: def, instance: null };
          }
          else {
              var leftovers1 = {};
              var singleRes = parseSingle(raw, allDayDefault, calendar, leftovers1, allowOpenRange);
              if (singleRes) {
                  var def = parseEventDef(leftovers1, sourceId, singleRes.allDay, singleRes.hasEnd, calendar);
                  var instance = createEventInstance(def.defId, singleRes.range, singleRes.forcedStartTzo, singleRes.forcedEndTzo);
                  return { def: def, instance: instance };
              }
          }
          return null;
      }
      /*
      Will NOT populate extendedProps with the leftover properties.
      Will NOT populate date-related props.
      The EventNonDateInput has been normalized (id => publicId, etc).
      */
      function parseEventDef(raw, sourceId, allDay, hasEnd, calendar) {
          var leftovers = {};
          var def = pluckNonDateProps(raw, calendar, leftovers);
          def.defId = String(uid++);
          def.sourceId = sourceId;
          def.allDay = allDay;
          def.hasEnd = hasEnd;
          for (var _i = 0, _a = calendar.pluginSystem.hooks.eventDefParsers; _i < _a.length; _i++) {
              var eventDefParser = _a[_i];
              var newLeftovers = {};
              eventDefParser(def, leftovers, newLeftovers);
              leftovers = newLeftovers;
          }
          def.extendedProps = __assign(leftovers, def.extendedProps || {});
          // help out EventApi from having user modify props
          Object.freeze(def.ui.classNames);
          Object.freeze(def.extendedProps);
          return def;
      }
      function createEventInstance(defId, range, forcedStartTzo, forcedEndTzo) {
          return {
              instanceId: String(uid++),
              defId: defId,
              range: range,
              forcedStartTzo: forcedStartTzo == null ? null : forcedStartTzo,
              forcedEndTzo: forcedEndTzo == null ? null : forcedEndTzo
          };
      }
      function parseSingle(raw, allDayDefault, calendar, leftovers, allowOpenRange) {
          var props = pluckDateProps(raw, leftovers);
          var allDay = props.allDay;
          var startMeta;
          var startMarker = null;
          var hasEnd = false;
          var endMeta;
          var endMarker = null;
          startMeta = calendar.dateEnv.createMarkerMeta(props.start);
          if (startMeta) {
              startMarker = startMeta.marker;
          }
          else if (!allowOpenRange) {
              return null;
          }
          if (props.end != null) {
              endMeta = calendar.dateEnv.createMarkerMeta(props.end);
          }
          if (allDay == null) {
              if (allDayDefault != null) {
                  allDay = allDayDefault;
              }
              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 = calendar.opt('forceEventDuration') || false;
              endMarker = calendar.dateEnv.add(startMarker, allDay ?
                  calendar.defaultAllDayEventDuration :
                  calendar.defaultTimedEventDuration);
          }
          return {
              allDay: allDay,
              hasEnd: hasEnd,
              range: { start: startMarker, end: endMarker },
              forcedStartTzo: startMeta ? startMeta.forcedTzo : null,
              forcedEndTzo: endMeta ? endMeta.forcedTzo : null
          };
      }
      function pluckDateProps(raw, leftovers) {
          var props = refineProps(raw, DATE_PROPS, {}, leftovers);
          props.start = (props.start !== null) ? props.start : props.date;
          delete props.date;
          return props;
      }
      function pluckNonDateProps(raw, calendar, leftovers) {
          var preLeftovers = {};
          var props = refineProps(raw, NON_DATE_PROPS, {}, preLeftovers);
          var ui = processUnscopedUiProps(preLeftovers, calendar, leftovers);
          props.publicId = props.id;
          delete props.id;
          props.ui = ui;
          return props;
      }
      function computeIsAllDayDefault(sourceId, calendar) {
          var res = null;
          if (sourceId) {
              var source = calendar.state.eventSources[sourceId];
              res = source.allDayDefault;
          }
          if (res == null) {
              res = calendar.opt('allDayDefault');
          }
          return res;
      }
  
      var DEF_DEFAULTS = {
          startTime: '09:00',
          endTime: '17:00',
          daysOfWeek: [1, 2, 3, 4, 5],
          rendering: 'inverse-background',
          classNames: 'fc-nonbusiness',
          groupId: '_businessHours' // so multiple defs get grouped
      };
      /*
      TODO: pass around as EventDefHash!!!
      */
      function parseBusinessHours(input, calendar) {
          return parseEvents(refineInputs(input), '', calendar);
      }
      function refineInputs(input) {
          var 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(function (rawDef) {
                  return rawDef.daysOfWeek;
              });
          }
          else if (typeof input === 'object' && input) { // non-null object
              rawDefs = [input];
          }
          else { // is probably false
              rawDefs = [];
          }
          rawDefs = rawDefs.map(function (rawDef) {
              return __assign({}, DEF_DEFAULTS, rawDef);
          });
          return rawDefs;
      }
  
      function memoizeRendering(renderFunc, unrenderFunc, dependencies) {
          if (dependencies === void 0) { dependencies = []; }
          var dependents = [];
          var thisContext;
          var prevArgs;
          function unrender() {
              if (prevArgs) {
                  for (var _i = 0, dependents_1 = dependents; _i < dependents_1.length; _i++) {
                      var dependent = dependents_1[_i];
                      dependent.unrender();
                  }
                  if (unrenderFunc) {
                      unrenderFunc.apply(thisContext, prevArgs);
                  }
                  prevArgs = null;
              }
          }
          function res() {
              if (!prevArgs || !isArraysEqual(prevArgs, arguments)) {
                  unrender();
                  thisContext = this;
                  prevArgs = arguments;
                  renderFunc.apply(this, arguments);
              }
          }
          res.dependents = dependents;
          res.unrender = unrender;
          for (var _i = 0, dependencies_1 = dependencies; _i < dependencies_1.length; _i++) {
              var dependency = dependencies_1[_i];
              dependency.dependents.push(res);
          }
          return res;
      }
  
      var EMPTY_EVENT_STORE = createEmptyEventStore(); // for purecomponents. TODO: keep elsewhere
      var Splitter = /** @class */ (function () {
          function Splitter() {
              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
          }
          Splitter.prototype.splitProps = function (props) {
              var _this = this;
              var keyInfos = this.getKeyInfo(props);
              var defKeys = this.getKeysForEventDefs(props.eventStore);
              var dateSelections = this.splitDateSelection(props.dateSelection);
              var individualUi = this.splitIndividualUi(props.eventUiBases, defKeys); // the individual *bases*
              var eventStores = this.splitEventStore(props.eventStore, defKeys);
              var eventDrags = this.splitEventDrag(props.eventDrag);
              var eventResizes = this.splitEventResize(props.eventResize);
              var splitProps = {};
              this.eventUiBuilders = mapHash(keyInfos, function (info, key) {
                  return _this.eventUiBuilders[key] || memoize(buildEventUiForKey);
              });
              for (var key in keyInfos) {
                  var keyInfo = keyInfos[key];
                  var eventStore = eventStores[key] || EMPTY_EVENT_STORE;
                  var buildEventUi = this.eventUiBuilders[key];
                  splitProps[key] = {
                      businessHours: keyInfo.businessHours || props.businessHours,
                      dateSelection: dateSelections[key] || null,
                      eventStore: 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;
          };
          Splitter.prototype._splitDateSpan = function (dateSpan) {
              var dateSpans = {};
              if (dateSpan) {
                  var keys = this.getKeysForDateSpan(dateSpan);
                  for (var _i = 0, keys_1 = keys; _i < keys_1.length; _i++) {
                      var key = keys_1[_i];
                      dateSpans[key] = dateSpan;
                  }
              }
              return dateSpans;
          };
          Splitter.prototype._getKeysForEventDefs = function (eventStore) {
              var _this = this;
              return mapHash(eventStore.defs, function (eventDef) {
                  return _this.getKeysForEventDef(eventDef);
              });
          };
          Splitter.prototype._splitEventStore = function (eventStore, defKeys) {
              var defs = eventStore.defs, instances = eventStore.instances;
              var splitStores = {};
              for (var defId in defs) {
                  for (var _i = 0, _a = defKeys[defId]; _i < _a.length; _i++) {
                      var key = _a[_i];
                      if (!splitStores[key]) {
                          splitStores[key] = createEmptyEventStore();
                      }
                      splitStores[key].defs[defId] = defs[defId];
                  }
              }
              for (var instanceId in instances) {
                  var instance = instances[instanceId];
                  for (var _b = 0, _c = defKeys[instance.defId]; _b < _c.length; _b++) {
                      var key = _c[_b];
                      if (splitStores[key]) { // must have already been created
                          splitStores[key].instances[instanceId] = instance;
                      }
                  }
              }
              return splitStores;
          };
          Splitter.prototype._splitIndividualUi = function (eventUiBases, defKeys) {
              var splitHashes = {};
              for (var defId in eventUiBases) {
                  if (defId) { // not the '' key
                      for (var _i = 0, _a = defKeys[defId]; _i < _a.length; _i++) {
                          var key = _a[_i];
                          if (!splitHashes[key]) {
                              splitHashes[key] = {};
                          }
                          splitHashes[key][defId] = eventUiBases[defId];
                      }
                  }
              }
              return splitHashes;
          };
          Splitter.prototype._splitInteraction = function (interaction) {
              var splitStates = {};
              if (interaction) {
                  var affectedStores_1 = this._splitEventStore(interaction.affectedEvents, this._getKeysForEventDefs(interaction.affectedEvents) // can't use cached. might be events from other calendar
                  );
                  // can't rely on defKeys because event data is mutated
                  var mutatedKeysByDefId = this._getKeysForEventDefs(interaction.mutatedEvents);
                  var mutatedStores_1 = this._splitEventStore(interaction.mutatedEvents, mutatedKeysByDefId);
                  var populate = function (key) {
                      if (!splitStates[key]) {
                          splitStates[key] = {
                              affectedEvents: affectedStores_1[key] || EMPTY_EVENT_STORE,
                              mutatedEvents: mutatedStores_1[key] || EMPTY_EVENT_STORE,
                              isEvent: interaction.isEvent,
                              origSeg: interaction.origSeg
                          };
                      }
                  };
                  for (var key in affectedStores_1) {
                      populate(key);
                  }
                  for (var key in mutatedStores_1) {
                      populate(key);
                  }
              }
              return splitStates;
          };
          return Splitter;
      }());
      function buildEventUiForKey(allUi, eventUiForKey, individualUi) {
          var baseParts = [];
          if (allUi) {
              baseParts.push(allUi);
          }
          if (eventUiForKey) {
              baseParts.push(eventUiForKey);
          }
          var stuff = {
              '': combineEventUis(baseParts)
          };
          if (individualUi) {
              __assign(stuff, individualUi);
          }
          return stuff;
      }
  
      // Generates HTML for an anchor to another view into the calendar.
      // Will either generate an <a> tag or a non-clickable <span> tag, depending on enabled settings.
      // `gotoOptions` can either be a DateMarker, or an object with the form:
      // { date, type, forceOff }
      // `type` is a view-type like "day" or "week". default value is "day".
      // `attrs` and `innerHtml` are use to generate the rest of the HTML tag.
      function buildGotoAnchorHtml(allOptions, dateEnv, gotoOptions, attrs, innerHtml) {
          var date;
          var type;
          var forceOff;
          var finalOptions;
          if (gotoOptions instanceof Date) {
              date = gotoOptions; // a single date-like input
          }
          else {
              date = gotoOptions.date;
              type = gotoOptions.type;
              forceOff = gotoOptions.forceOff;
          }
          finalOptions = {
              date: dateEnv.formatIso(date, { omitTime: true }),
              type: type || 'day'
          };
          if (typeof attrs === 'string') {
              innerHtml = attrs;
              attrs = null;
          }
          attrs = attrs ? ' ' + attrsToStr(attrs) : ''; // will have a leading space
          innerHtml = innerHtml || '';
          if (!forceOff && allOptions.navLinks) {
              return '<a' + attrs +
                  ' data-goto="' + htmlEscape(JSON.stringify(finalOptions)) + '">' +
                  innerHtml +
                  '</a>';
          }
          else {
              return '<span' + attrs + '>' +
                  innerHtml +
                  '</span>';
          }
      }
      function getAllDayHtml(allOptions) {
          return allOptions.allDayHtml || htmlEscape(allOptions.allDayText);
      }
      // Computes HTML classNames for a single-day element
      function getDayClasses(date, dateProfile, context, noThemeHighlight) {
          var calendar = context.calendar, options = context.options, theme = context.theme, dateEnv = context.dateEnv;
          var classes = [];
          var todayStart;
          var todayEnd;
          if (!rangeContainsMarker(dateProfile.activeRange, date)) {
              classes.push('fc-disabled-day');
          }
          else {
              classes.push('fc-' + DAY_IDS[date.getUTCDay()]);
              if (options.monthMode &&
                  dateEnv.getMonth(date) !== dateEnv.getMonth(dateProfile.currentRange.start)) {
                  classes.push('fc-other-month');
              }
              todayStart = startOfDay(calendar.getNow());
              todayEnd = addDays(todayStart, 1);
              if (date < todayStart) {
                  classes.push('fc-past');
              }
              else if (date >= todayEnd) {
                  classes.push('fc-future');
              }
              else {
                  classes.push('fc-today');
                  if (noThemeHighlight !== true) {
                      classes.push(theme.getClass('today'));
                  }
              }
          }
          return classes;
      }
  
      // 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, success, failure) {
          // guard against success/failure callbacks being called more than once
          // and guard against a promise AND callback being used together.
          var isResolved = false;
          var wrappedSuccess = function () {
              if (!isResolved) {
                  isResolved = true;
                  success.apply(this, arguments);
              }
          };
          var wrappedFailure = function () {
              if (!isResolved) {
                  isResolved = true;
                  if (failure) {
                      failure.apply(this, arguments);
                  }
              }
          };
          var res = func(wrappedSuccess, wrappedFailure);
          if (res && typeof res.then === 'function') {
              res.then(wrappedSuccess, wrappedFailure);
          }
      }
  
      var Mixin = /** @class */ (function () {
          function Mixin() {
          }
          // mix into a CLASS
          Mixin.mixInto = function (destClass) {
              this.mixIntoObj(destClass.prototype);
          };
          // mix into ANY object
          Mixin.mixIntoObj = function (destObj) {
              var _this = this;
              Object.getOwnPropertyNames(this.prototype).forEach(function (name) {
                  if (!destObj[name]) { // if destination doesn't already define it
                      destObj[name] = _this.prototype[name];
                  }
              });
          };
          /*
          will override existing methods
          TODO: remove! not used anymore
          */
          Mixin.mixOver = function (destClass) {
              var _this = this;
              Object.getOwnPropertyNames(this.prototype).forEach(function (name) {
                  destClass.prototype[name] = _this.prototype[name];
              });
          };
          return Mixin;
      }());
  
      /*
      USAGE:
        import { default as EmitterMixin, EmitterInterface } from './EmitterMixin'
      in class:
        on: EmitterInterface['on']
        one: EmitterInterface['one']
        off: EmitterInterface['off']
        trigger: EmitterInterface['trigger']
        triggerWith: EmitterInterface['triggerWith']
        hasHandlers: EmitterInterface['hasHandlers']
      after class:
        EmitterMixin.mixInto(TheClass)
      */
      var EmitterMixin = /** @class */ (function (_super) {
          __extends(EmitterMixin, _super);
          function EmitterMixin() {
              return _super !== null && _super.apply(this, arguments) || this;
          }
          EmitterMixin.prototype.on = function (type, handler) {
              addToHash(this._handlers || (this._handlers = {}), type, handler);
              return this; // for chaining
          };
          // todo: add comments
          EmitterMixin.prototype.one = function (type, handler) {
              addToHash(this._oneHandlers || (this._oneHandlers = {}), type, handler);
              return this; // for chaining
          };
          EmitterMixin.prototype.off = function (type, handler) {
              if (this._handlers) {
                  removeFromHash(this._handlers, type, handler);
              }
              if (this._oneHandlers) {
                  removeFromHash(this._oneHandlers, type, handler);
              }
              return this; // for chaining
          };
          EmitterMixin.prototype.trigger = function (type) {
              var args = [];
              for (var _i = 1; _i < arguments.length; _i++) {
                  args[_i - 1] = arguments[_i];
              }
              this.triggerWith(type, this, args);
              return this; // for chaining
          };
          EmitterMixin.prototype.triggerWith = function (type, context, args) {
              if (this._handlers) {
                  applyAll(this._handlers[type], context, args);
              }
              if (this._oneHandlers) {
                  applyAll(this._oneHandlers[type], context, args);
                  delete this._oneHandlers[type]; // will never fire again
              }
              return this; // for chaining
          };
          EmitterMixin.prototype.hasHandlers = function (type) {
              return (this._handlers && this._handlers[type] && this._handlers[type].length) ||
                  (this._oneHandlers && this._oneHandlers[type] && this._oneHandlers[type].length);
          };
          return EmitterMixin;
      }(Mixin));
      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(function (func) {
                      return 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.
      */
      var PositionCache = /** @class */ (function () {
          function PositionCache(originEl, els, isHorizontal, isVertical) {
              this.originEl = originEl;
              this.els = els;
              this.isHorizontal = isHorizontal;
              this.isVertical = isVertical;
          }
          // Queries the els for coordinates and stores them.
          // Call this method before using and of the get* methods below.
          PositionCache.prototype.build = function () {
              var originEl = this.originEl;
              var originClientRect = this.originClientRect =
                  originEl.getBoundingClientRect(); // relative to viewport top-left
              if (this.isHorizontal) {
                  this.buildElHorizontals(originClientRect.left);
              }
              if (this.isVertical) {
                  this.buildElVerticals(originClientRect.top);
              }
          };
          // Populates the left/right internal coordinate arrays
          PositionCache.prototype.buildElHorizontals = function (originClientLeft) {
              var lefts = [];
              var rights = [];
              for (var _i = 0, _a = this.els; _i < _a.length; _i++) {
                  var el = _a[_i];
                  var 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
          PositionCache.prototype.buildElVerticals = function (originClientTop) {
              var tops = [];
              var bottoms = [];
              for (var _i = 0, _a = this.els; _i < _a.length; _i++) {
                  var el = _a[_i];
                  var 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.
          PositionCache.prototype.leftToIndex = function (leftPosition) {
              var lefts = this.lefts;
              var rights = this.rights;
              var len = lefts.length;
              var i;
              for (i = 0; i < len; i++) {
                  if (leftPosition >= lefts[i] && leftPosition < rights[i]) {
                      return i;
                  }
              }
          };
          // Given a top offset (from document top), returns the index of the el that it vertically intersects.
          // If no intersection is made, returns undefined.
          PositionCache.prototype.topToIndex = function (topPosition) {
              var tops = this.tops;
              var bottoms = this.bottoms;
              var len = tops.length;
              var i;
              for (i = 0; i < len; i++) {
                  if (topPosition >= tops[i] && topPosition < bottoms[i]) {
                      return i;
                  }
              }
          };
          // Gets the width of the element at the given index
          PositionCache.prototype.getWidth = function (leftIndex) {
              return this.rights[leftIndex] - this.lefts[leftIndex];
          };
          // Gets the height of the element at the given index
          PositionCache.prototype.getHeight = function (topIndex) {
              return this.bottoms[topIndex] - this.tops[topIndex];
          };
          return PositionCache;
      }());
  
      /*
      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.
      */
      var ScrollController = /** @class */ (function () {
          function ScrollController() {
          }
          ScrollController.prototype.getMaxScrollTop = function () {
              return this.getScrollHeight() - this.getClientHeight();
          };
          ScrollController.prototype.getMaxScrollLeft = function () {
              return this.getScrollWidth() - this.getClientWidth();
          };
          ScrollController.prototype.canScrollVertically = function () {
              return this.getMaxScrollTop() > 0;
          };
          ScrollController.prototype.canScrollHorizontally = function () {
              return this.getMaxScrollLeft() > 0;
          };
          ScrollController.prototype.canScrollUp = function () {
              return this.getScrollTop() > 0;
          };
          ScrollController.prototype.canScrollDown = function () {
              return this.getScrollTop() < this.getMaxScrollTop();
          };
          ScrollController.prototype.canScrollLeft = function () {
              return this.getScrollLeft() > 0;
          };
          ScrollController.prototype.canScrollRight = function () {
              return this.getScrollLeft() < this.getMaxScrollLeft();
          };
          return ScrollController;
      }());
      var ElementScrollController = /** @class */ (function (_super) {
          __extends(ElementScrollController, _super);
          function ElementScrollController(el) {
              var _this = _super.call(this) || this;
              _this.el = el;
              return _this;
          }
          ElementScrollController.prototype.getScrollTop = function () {
              return this.el.scrollTop;
          };
          ElementScrollController.prototype.getScrollLeft = function () {
              return this.el.scrollLeft;
          };
          ElementScrollController.prototype.setScrollTop = function (top) {
              this.el.scrollTop = top;
          };
          ElementScrollController.prototype.setScrollLeft = function (left) {
              this.el.scrollLeft = left;
          };
          ElementScrollController.prototype.getScrollWidth = function () {
              return this.el.scrollWidth;
          };
          ElementScrollController.prototype.getScrollHeight = function () {
              return this.el.scrollHeight;
          };
          ElementScrollController.prototype.getClientHeight = function () {
              return this.el.clientHeight;
          };
          ElementScrollController.prototype.getClientWidth = function () {
              return this.el.clientWidth;
          };
          return ElementScrollController;
      }(ScrollController));
      var WindowScrollController = /** @class */ (function (_super) {
          __extends(WindowScrollController, _super);
          function WindowScrollController() {
              return _super !== null && _super.apply(this, arguments) || this;
          }
          WindowScrollController.prototype.getScrollTop = function () {
              return window.pageYOffset;
          };
          WindowScrollController.prototype.getScrollLeft = function () {
              return window.pageXOffset;
          };
          WindowScrollController.prototype.setScrollTop = function (n) {
              window.scroll(window.pageXOffset, n);
          };
          WindowScrollController.prototype.setScrollLeft = function (n) {
              window.scroll(n, window.pageYOffset);
          };
          WindowScrollController.prototype.getScrollWidth = function () {
              return document.documentElement.scrollWidth;
          };
          WindowScrollController.prototype.getScrollHeight = function () {
              return document.documentElement.scrollHeight;
          };
          WindowScrollController.prototype.getClientHeight = function () {
              return document.documentElement.clientHeight;
          };
          WindowScrollController.prototype.getClientWidth = function () {
              return document.documentElement.clientWidth;
          };
          return WindowScrollController;
      }(ScrollController));
  
      /*
      Embodies a div that has potential scrollbars
      */
      var ScrollComponent = /** @class */ (function (_super) {
          __extends(ScrollComponent, _super);
          function ScrollComponent(overflowX, overflowY) {
              var _this = _super.call(this, createElement('div', {
                  className: 'fc-scroller'
              })) || this;
              _this.overflowX = overflowX;
              _this.overflowY = overflowY;
              _this.applyOverflow();
              return _this;
          }
          // sets to natural height, unlocks overflow
          ScrollComponent.prototype.clear = function () {
              this.setHeight('auto');
              this.applyOverflow();
          };
          ScrollComponent.prototype.destroy = function () {
              removeElement(this.el);
          };
          // Overflow
          // -----------------------------------------------------------------------------------------------------------------
          ScrollComponent.prototype.applyOverflow = function () {
              applyStyle(this.el, {
                  overflowX: this.overflowX,
                  overflowY: this.overflowY
              });
          };
          // Causes any 'auto' overflow values to resolves to 'scroll' or 'hidden'.
          // Useful for preserving scrollbar widths regardless of future resizes.
          // Can pass in scrollbarWidths for optimization.
          ScrollComponent.prototype.lockOverflow = function (scrollbarWidths) {
              var overflowX = this.overflowX;
              var overflowY = this.overflowY;
              scrollbarWidths = scrollbarWidths || this.getScrollbarWidths();
              if (overflowX === 'auto') {
                  overflowX = (scrollbarWidths.bottom || // horizontal scrollbars?
                      this.canScrollHorizontally() // OR scrolling pane with massless scrollbars?
                  ) ? 'scroll' : 'hidden';
              }
              if (overflowY === 'auto') {
                  overflowY = (scrollbarWidths.left || scrollbarWidths.right || // horizontal scrollbars?
                      this.canScrollVertically() // OR scrolling pane with massless scrollbars?
                  ) ? 'scroll' : 'hidden';
              }
              applyStyle(this.el, { overflowX: overflowX, overflowY: overflowY });
          };
          ScrollComponent.prototype.setHeight = function (height) {
              applyStyleProp(this.el, 'height', height);
          };
          ScrollComponent.prototype.getScrollbarWidths = function () {
              var edges = computeEdges(this.el);
              return {
                  left: edges.scrollbarLeft,
                  right: edges.scrollbarRight,
                  bottom: edges.scrollbarBottom
              };
          };
          return ScrollComponent;
      }(ElementScrollController));
  
      var Theme = /** @class */ (function () {
          function Theme(calendarOptions) {
              this.calendarOptions = calendarOptions;
              this.processIconOverride();
          }
          Theme.prototype.processIconOverride = function () {
              if (this.iconOverrideOption) {
                  this.setIconOverride(this.calendarOptions[this.iconOverrideOption]);
              }
          };
          Theme.prototype.setIconOverride = function (iconOverrideHash) {
              var iconClassesCopy;
              var buttonName;
              if (typeof iconOverrideHash === 'object' && iconOverrideHash) { // non-null object
                  iconClassesCopy = __assign({}, this.iconClasses);
                  for (buttonName in iconOverrideHash) {
                      iconClassesCopy[buttonName] = this.applyIconOverridePrefix(iconOverrideHash[buttonName]);
                  }
                  this.iconClasses = iconClassesCopy;
              }
              else if (iconOverrideHash === false) {
                  this.iconClasses = {};
              }
          };
          Theme.prototype.applyIconOverridePrefix = function (className) {
              var prefix = this.iconOverridePrefix;
              if (prefix && className.indexOf(prefix) !== 0) { // if not already present
                  className = prefix + className;
              }
              return className;
          };
          Theme.prototype.getClass = function (key) {
              return this.classes[key] || '';
          };
          Theme.prototype.getIconClass = function (buttonName) {
              var className = this.iconClasses[buttonName];
              if (className) {
                  return this.baseIconClass + ' ' + className;
              }
              return '';
          };
          Theme.prototype.getCustomButtonIconClass = function (customButtonProps) {
              var className;
              if (this.iconOverrideCustomButtonOption) {
                  className = customButtonProps[this.iconOverrideCustomButtonOption];
                  if (className) {
                      return this.baseIconClass + ' ' + this.applyIconOverridePrefix(className);
                  }
              }
              return '';
          };
          return Theme;
      }());
      Theme.prototype.classes = {};
      Theme.prototype.iconClasses = {};
      Theme.prototype.baseIconClass = '';
      Theme.prototype.iconOverridePrefix = '';
  
      var guid = 0;
      var ComponentContext = /** @class */ (function () {
          function ComponentContext(calendar, theme, dateEnv, options, view) {
              this.calendar = calendar;
              this.theme = theme;
              this.dateEnv = dateEnv;
              this.options = options;
              this.view = view;
              this.isRtl = options.dir === 'rtl';
              this.eventOrderSpecs = parseFieldSpecs(options.eventOrder);
              this.nextDayThreshold = createDuration(options.nextDayThreshold);
          }
          ComponentContext.prototype.extend = function (options, view) {
              return new ComponentContext(this.calendar, this.theme, this.dateEnv, options || this.options, view || this.view);
          };
          return ComponentContext;
      }());
      var Component = /** @class */ (function () {
          function Component() {
              this.everRendered = false;
              this.uid = String(guid++);
          }
          Component.addEqualityFuncs = function (newFuncs) {
              this.prototype.equalityFuncs = __assign({}, this.prototype.equalityFuncs, newFuncs);
          };
          Component.prototype.receiveProps = function (props, context) {
              this.receiveContext(context);
              var _a = recycleProps(this.props || {}, props, this.equalityFuncs), anyChanges = _a.anyChanges, comboProps = _a.comboProps;
              this.props = comboProps;
              if (anyChanges) {
                  if (this.everRendered) {
                      this.beforeUpdate();
                  }
                  this.render(comboProps, context);
                  if (this.everRendered) {
                      this.afterUpdate();
                  }
              }
              this.everRendered = true;
          };
          Component.prototype.receiveContext = function (context) {
              var oldContext = this.context;
              this.context = context;
              if (!oldContext) {
                  this.firstContext(context);
              }
          };
          Component.prototype.render = function (props, context) {
          };
          Component.prototype.firstContext = function (context) {
          };
          Component.prototype.beforeUpdate = function () {
          };
          Component.prototype.afterUpdate = function () {
          };
          // after destroy is called, this component won't ever be used again
          Component.prototype.destroy = function () {
          };
          return Component;
      }());
      Component.prototype.equalityFuncs = {};
      /*
      Reuses old values when equal. If anything is unequal, returns newProps as-is.
      Great for PureComponent, but won't be feasible with React, so just eliminate and use React's DOM diffing.
      */
      function recycleProps(oldProps, newProps, equalityFuncs) {
          var comboProps = {}; // some old, some new
          var anyChanges = false;
          for (var key in newProps) {
              if (key in oldProps && (oldProps[key] === newProps[key] ||
                  (equalityFuncs[key] && equalityFuncs[key](oldProps[key], newProps[key])))) {
                  // equal to old? use old prop
                  comboProps[key] = oldProps[key];
              }
              else {
                  comboProps[key] = newProps[key];
                  anyChanges = true;
              }
          }
          for (var key in oldProps) {
              if (!(key in newProps)) {
                  anyChanges = true;
                  break;
              }
          }
          return { anyChanges: anyChanges, comboProps: comboProps };
      }
  
      /*
      PURPOSES:
      - hook up to fg, fill, and mirror renderers
      - interface for dragging and hits
      */
      var DateComponent = /** @class */ (function (_super) {
          __extends(DateComponent, _super);
          function DateComponent(el) {
              var _this = _super.call(this) || this;
              _this.el = el;
              return _this;
          }
          DateComponent.prototype.destroy = function () {
              _super.prototype.destroy.call(this);
              removeElement(this.el);
          };
          // Hit System
          // -----------------------------------------------------------------------------------------------------------------
          DateComponent.prototype.buildPositionCaches = function () {
          };
          DateComponent.prototype.queryHit = function (positionLeft, positionTop, elWidth, elHeight) {
              return null; // this should be abstract
          };
          // Validation
          // -----------------------------------------------------------------------------------------------------------------
          DateComponent.prototype.isInteractionValid = function (interaction) {
              var calendar = this.context.calendar;
              var dateProfile = this.props.dateProfile; // HACK
              var instances = interaction.mutatedEvents.instances;
              if (dateProfile) { // HACK for DayTile
                  for (var instanceId in instances) {
                      if (!rangeContainsRange(dateProfile.validRange, instances[instanceId].range)) {
                          return false;
                      }
                  }
              }
              return isInteractionValid(interaction, calendar);
          };
          DateComponent.prototype.isDateSelectionValid = function (selection) {
              var calendar = this.context.calendar;
              var dateProfile = this.props.dateProfile; // HACK
              if (dateProfile && // HACK for DayTile
                  !rangeContainsRange(dateProfile.validRange, selection.range)) {
                  return false;
              }
              return isDateSelectionValid(selection, calendar);
          };
          // Pointer Interaction Utils
          // -----------------------------------------------------------------------------------------------------------------
          DateComponent.prototype.isValidSegDownEl = function (el) {
              return !this.props.eventDrag && // HACK
                  !this.props.eventResize && // HACK
                  !elementClosest(el, '.fc-mirror') &&
                  (this.isPopover() || !this.isInPopover(el));
              // ^above line ensures we don't detect a seg interaction within a nested component.
              // it's a HACK because it only supports a popover as the nested component.
          };
          DateComponent.prototype.isValidDateDownEl = function (el) {
              var segEl = elementClosest(el, this.fgSegSelector);
              return (!segEl || segEl.classList.contains('fc-mirror')) &&
                  !elementClosest(el, '.fc-more') && // a "more.." link
                  !elementClosest(el, 'a[data-goto]') && // a clickable nav link
                  !this.isInPopover(el);
          };
          DateComponent.prototype.isPopover = function () {
              return this.el.classList.contains('fc-popover');
          };
          DateComponent.prototype.isInPopover = function (el) {
              return Boolean(elementClosest(el, '.fc-popover'));
          };
          return DateComponent;
      }(Component));
      DateComponent.prototype.fgSegSelector = '.fc-event-container > *';
      DateComponent.prototype.bgSegSelector = '.fc-bgevent:not(.fc-nonbusiness)';
  
      var uid$1 = 0;
      function createPlugin(input) {
          return {
              id: String(uid$1++),
              deps: input.deps || [],
              reducers: input.reducers || [],
              eventDefParsers: input.eventDefParsers || [],
              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 || [],
              eventResizeJoinTransforms: input.eventResizeJoinTransforms || [],
              viewContainerModifiers: input.viewContainerModifiers || [],
              eventDropTransformers: input.eventDropTransformers || [],
              componentInteractions: input.componentInteractions || [],
              calendarInteractions: input.calendarInteractions || [],
              themeClasses: input.themeClasses || {},
              eventSourceDefs: input.eventSourceDefs || [],
              cmdFormatter: input.cmdFormatter,
              recurringTypes: input.recurringTypes || [],
              namedTimeZonedImpl: input.namedTimeZonedImpl,
              defaultView: input.defaultView || '',
              elementDraggingImpl: input.elementDraggingImpl,
              optionChangeHandlers: input.optionChangeHandlers || {}
          };
      }
      var PluginSystem = /** @class */ (function () {
          function PluginSystem() {
              this.hooks = {
                  reducers: [],
                  eventDefParsers: [],
                  isDraggableTransformers: [],
                  eventDragMutationMassagers: [],
                  eventDefMutationAppliers: [],
                  dateSelectionTransformers: [],
                  datePointTransforms: [],
                  dateSpanTransforms: [],
                  views: {},
                  viewPropsTransformers: [],
                  isPropsValid: null,
                  externalDefTransforms: [],
                  eventResizeJoinTransforms: [],
                  viewContainerModifiers: [],
                  eventDropTransformers: [],
                  componentInteractions: [],
                  calendarInteractions: [],
                  themeClasses: {},
                  eventSourceDefs: [],
                  cmdFormatter: null,
                  recurringTypes: [],
                  namedTimeZonedImpl: null,
                  defaultView: '',
                  elementDraggingImpl: null,
                  optionChangeHandlers: {}
              };
              this.addedHash = {};
          }
          PluginSystem.prototype.add = function (plugin) {
              if (!this.addedHash[plugin.id]) {
                  this.addedHash[plugin.id] = true;
                  for (var _i = 0, _a = plugin.deps; _i < _a.length; _i++) {
                      var dep = _a[_i];
                      this.add(dep);
                  }
                  this.hooks = combineHooks(this.hooks, plugin);
              }
          };
          return PluginSystem;
      }());
      function combineHooks(hooks0, hooks1) {
          return {
              reducers: hooks0.reducers.concat(hooks1.reducers),
              eventDefParsers: hooks0.eventDefParsers.concat(hooks1.eventDefParsers),
              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: __assign({}, hooks0.views, hooks1.views),
              viewPropsTransformers: hooks0.viewPropsTransformers.concat(hooks1.viewPropsTransformers),
              isPropsValid: hooks1.isPropsValid || hooks0.isPropsValid,
              externalDefTransforms: hooks0.externalDefTransforms.concat(hooks1.externalDefTransforms),
              eventResizeJoinTransforms: hooks0.eventResizeJoinTransforms.concat(hooks1.eventResizeJoinTransforms),
              viewContainerModifiers: hooks0.viewContainerModifiers.concat(hooks1.viewContainerModifiers),
              eventDropTransformers: hooks0.eventDropTransformers.concat(hooks1.eventDropTransformers),
              calendarInteractions: hooks0.calendarInteractions.concat(hooks1.calendarInteractions),
              componentInteractions: hooks0.componentInteractions.concat(hooks1.componentInteractions),
              themeClasses: __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,
              defaultView: hooks0.defaultView || hooks1.defaultView,
              elementDraggingImpl: hooks0.elementDraggingImpl || hooks1.elementDraggingImpl,
              optionChangeHandlers: __assign({}, hooks0.optionChangeHandlers, hooks1.optionChangeHandlers)
          };
      }
  
      var eventSourceDef = {
          ignoreRange: true,
          parseMeta: function (raw) {
              if (Array.isArray(raw)) { // short form
                  return raw;
              }
              else if (Array.isArray(raw.events)) {
                  return raw.events;
              }
              return null;
          },
          fetch: function (arg, success) {
              success({
                  rawEvents: arg.eventSource.meta
              });
          }
      };
      var ArrayEventSourcePlugin = createPlugin({
          eventSourceDefs: [eventSourceDef]
      });
  
      var eventSourceDef$1 = {
          parseMeta: function (raw) {
              if (typeof raw === 'function') { // short form
                  return raw;
              }
              else if (typeof raw.events === 'function') {
                  return raw.events;
              }
              return null;
          },
          fetch: function (arg, success, failure) {
              var dateEnv = arg.calendar.dateEnv;
              var func = arg.eventSource.meta;
              unpromisify(func.bind(null, {
                  start: dateEnv.toDate(arg.range.start),
                  end: dateEnv.toDate(arg.range.end),
                  startStr: dateEnv.formatIso(arg.range.start),
                  endStr: dateEnv.formatIso(arg.range.end),
                  timeZone: dateEnv.timeZone
              }), function (rawEvents) {
                  success({ rawEvents: rawEvents }); // needs an object response
              }, failure // send errorObj directly to failure callback
              );
          }
      };
      var FuncEventSourcePlugin = createPlugin({
          eventSourceDefs: [eventSourceDef$1]
      });
  
      function requestJson(method, url, params, successCallback, failureCallback) {
          method = method.toUpperCase();
          var body = null;
          if (method === 'GET') {
              url = injectQueryStringParams(url, params);
          }
          else {
              body = encodeParams(params);
          }
          var xhr = new XMLHttpRequest();
          xhr.open(method, url, true);
          if (method !== 'GET') {
              xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
          }
          xhr.onload = function () {
              if (xhr.status >= 200 && xhr.status < 400) {
                  try {
                      var res = JSON.parse(xhr.responseText);
                      successCallback(res, xhr);
                  }
                  catch (err) {
                      failureCallback('Failure parsing JSON', xhr);
                  }
              }
              else {
                  failureCallback('Request failed', xhr);
              }
          };
          xhr.onerror = function () {
              failureCallback('Request failed', xhr);
          };
          xhr.send(body);
      }
      function injectQueryStringParams(url, params) {
          return url +
              (url.indexOf('?') === -1 ? '?' : '&') +
              encodeParams(params);
      }
      function encodeParams(params) {
          var parts = [];
          for (var key in params) {
              parts.push(encodeURIComponent(key) + '=' + encodeURIComponent(params[key]));
          }
          return parts.join('&');
      }
  
      var eventSourceDef$2 = {
          parseMeta: function (raw) {
              if (typeof raw === 'string') { // short form
                  raw = { url: raw };
              }
              else if (!raw || typeof raw !== 'object' || !raw.url) {
                  return null;
              }
              return {
                  url: raw.url,
                  method: (raw.method || 'GET').toUpperCase(),
                  extraParams: raw.extraParams,
                  startParam: raw.startParam,
                  endParam: raw.endParam,
                  timeZoneParam: raw.timeZoneParam
              };
          },
          fetch: function (arg, success, failure) {
              var meta = arg.eventSource.meta;
              var requestParams = buildRequestParams(meta, arg.range, arg.calendar);
              requestJson(meta.method, meta.url, requestParams, function (rawEvents, xhr) {
                  success({ rawEvents: rawEvents, xhr: xhr });
              }, function (errorMessage, xhr) {
                  failure({ message: errorMessage, xhr: xhr });
              });
          }
      };
      var JsonFeedEventSourcePlugin = createPlugin({
          eventSourceDefs: [eventSourceDef$2]
      });
      function buildRequestParams(meta, range, calendar) {
          var dateEnv = calendar.dateEnv;
          var startParam;
          var endParam;
          var timeZoneParam;
          var customRequestParams;
          var params = {};
          startParam = meta.startParam;
          if (startParam == null) {
              startParam = calendar.opt('startParam');
          }
          endParam = meta.endParam;
          if (endParam == null) {
              endParam = calendar.opt('endParam');
          }
          timeZoneParam = meta.timeZoneParam;
          if (timeZoneParam == null) {
              timeZoneParam = calendar.opt('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 || {};
          }
          __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;
      }
  
      var recurring = {
          parse: function (rawEvent, leftoverProps, dateEnv) {
              var createMarker = dateEnv.createMarker.bind(dateEnv);
              var processors = {
                  daysOfWeek: null,
                  startTime: createDuration,
                  endTime: createDuration,
                  startRecur: createMarker,
                  endRecur: createMarker
              };
              var props = refineProps(rawEvent, processors, {}, leftoverProps);
              var anyValid = false;
              for (var propName in props) {
                  if (props[propName] != null) {
                      anyValid = true;
                      break;
                  }
              }
              if (anyValid) {
                  var duration = null;
                  if ('duration' in leftoverProps) {
                      duration = createDuration(leftoverProps.duration);
                      delete leftoverProps.duration;
                  }
                  if (!duration && props.startTime && props.endTime) {
                      duration = subtractDurations(props.endTime, props.startTime);
                  }
                  return {
                      allDayGuess: Boolean(!props.startTime && !props.endTime),
                      duration: duration,
                      typeData: props // doesn't need endTime anymore but oh well
                  };
              }
              return null;
          },
          expand: function (typeData, framingRange, dateEnv) {
              var clippedFramingRange = intersectRanges(framingRange, { start: typeData.startRecur, end: typeData.endRecur });
              if (clippedFramingRange) {
                  return expandRanges(typeData.daysOfWeek, typeData.startTime, clippedFramingRange, dateEnv);
              }
              else {
                  return [];
              }
          }
      };
      var SimpleRecurrencePlugin = createPlugin({
          recurringTypes: [recurring]
      });
      function expandRanges(daysOfWeek, startTime, framingRange, dateEnv) {
          var dowHash = daysOfWeek ? arrayToHash(daysOfWeek) : null;
          var dayMarker = startOfDay(framingRange.start);
          var endMarker = framingRange.end;
          var instanceStarts = [];
          while (dayMarker < endMarker) {
              var instanceStart 
              // if everyday, or this particular day-of-week
              = void 0;
              // if everyday, or this particular day-of-week
              if (!dowHash || dowHash[dayMarker.getUTCDay()]) {
                  if (startTime) {
                      instanceStart = dateEnv.add(dayMarker, startTime);
                  }
                  else {
                      instanceStart = dayMarker;
                  }
                  instanceStarts.push(instanceStart);
              }
              dayMarker = addDays(dayMarker, 1);
          }
          return instanceStarts;
      }
  
      var DefaultOptionChangeHandlers = createPlugin({
          optionChangeHandlers: {
              events: function (events, calendar, deepEqual) {
                  handleEventSources([events], calendar, deepEqual);
              },
              eventSources: handleEventSources,
              plugins: handlePlugins
          }
      });
      function handleEventSources(inputs, calendar, deepEqual) {
          var unfoundSources = hashValuesToArray(calendar.state.eventSources);
          var newInputs = [];
          for (var _i = 0, inputs_1 = inputs; _i < inputs_1.length; _i++) {
              var input = inputs_1[_i];
              var inputFound = false;
              for (var i = 0; i < unfoundSources.length; i++) {
                  if (deepEqual(unfoundSources[i]._raw, input)) {
                      unfoundSources.splice(i, 1); // delete
                      inputFound = true;
                      break;
                  }
              }
              if (!inputFound) {
                  newInputs.push(input);
              }
          }
          for (var _a = 0, unfoundSources_1 = unfoundSources; _a < unfoundSources_1.length; _a++) {
              var unfoundSource = unfoundSources_1[_a];
              calendar.dispatch({
                  type: 'REMOVE_EVENT_SOURCE',
                  sourceId: unfoundSource.sourceId
              });
          }
          for (var _b = 0, newInputs_1 = newInputs; _b < newInputs_1.length; _b++) {
              var newInput = newInputs_1[_b];
              calendar.addEventSource(newInput);
          }
      }
      // shortcoming: won't remove plugins
      function handlePlugins(inputs, calendar) {
          calendar.addPluginInputs(inputs); // will gracefully handle duplicates
      }
  
      var config = {}; // TODO: make these options
      var globalDefaults = {
          defaultRangeSeparator: ' - ',
          titleRangeSeparator: ' \u2013 ',
          defaultTimedEventDuration: '01:00:00',
          defaultAllDayEventDuration: { day: 1 },
          forceEventDuration: false,
          nextDayThreshold: '00:00:00',
          // display
          columnHeader: true,
          defaultView: '',
          aspectRatio: 1.35,
          header: {
              left: 'title',
              center: '',
              right: 'today prev,next'
          },
          weekends: true,
          weekNumbers: false,
          weekNumberCalculation: 'local',
          editable: false,
          // nowIndicator: false,
          scrollTime: '06:00:00',
          minTime: '00:00:00',
          maxTime: '24:00:00',
          showNonCurrentDates: true,
          // event ajax
          lazyFetching: true,
          startParam: 'start',
          endParam: 'end',
          timeZoneParam: 'timeZone',
          timeZone: 'local',
          // allDayDefault: undefined,
          // locale
          locales: [],
          locale: '',
          // dir: will get this from the default locale
          // buttonIcons: null,
          // allows setting a min-height to the event segment to prevent short events overlapping each other
          timeGridEventMinHeight: 0,
          themeSystem: 'standard',
          // eventResizableFromStart: false,
          dragRevertDuration: 500,
          dragScroll: true,
          allDayMaintainDuration: false,
          // selectable: false,
          unselectAuto: true,
          // selectMinDistance: 0,
          dropAccept: '*',
          eventOrder: 'start,-duration,allDay,title',
          // ^ if start tie, longer events go before shorter. final tie-breaker is title text
          // rerenderDelay: null,
          eventLimit: false,
          eventLimitClick: 'popover',
          dayPopoverFormat: { month: 'long', day: 'numeric', year: 'numeric' },
          handleWindowResize: true,
          windowResizeDelay: 100,
          longPressDelay: 1000,
          eventDragMinDistance: 5 // only applies to mouse
      };
      var rtlDefaults = {
          header: {
              left: 'next,prev today',
              center: '',
              right: 'title'
          },
          buttonIcons: {
              // TODO: make RTL support the responibility of the theme
              prev: 'fc-icon-chevron-right',
              next: 'fc-icon-chevron-left',
              prevYear: 'fc-icon-chevrons-right',
              nextYear: 'fc-icon-chevrons-left'
          }
      };
      var complexOptions = [
          'header',
          'footer',
          'buttonText',
          'buttonIcons'
      ];
      // Merges an array of option objects into a single object
      function mergeOptions(optionObjs) {
          return mergeProps(optionObjs, complexOptions);
      }
      // TODO: move this stuff to a "plugin"-related file...
      var INTERNAL_PLUGINS = [
          ArrayEventSourcePlugin,
          FuncEventSourcePlugin,
          JsonFeedEventSourcePlugin,
          SimpleRecurrencePlugin,
          DefaultOptionChangeHandlers
      ];
      function refinePluginDefs(pluginInputs) {
          var plugins = [];
          for (var _i = 0, pluginInputs_1 = pluginInputs; _i < pluginInputs_1.length; _i++) {
              var pluginInput = pluginInputs_1[_i];
              if (typeof pluginInput === 'string') {
                  var globalName = 'FullCalendar' + capitaliseFirstLetter(pluginInput);
                  if (!window[globalName]) {
                      console.warn('Plugin file not loaded for ' + pluginInput);
                  }
                  else {
                      plugins.push(window[globalName].default); // is an ES6 module
                  }
              }
              else {
                  plugins.push(pluginInput);
              }
          }
          return INTERNAL_PLUGINS.concat(plugins);
      }
  
      var RAW_EN_LOCALE = {
          code: 'en',
          week: {
              dow: 0,
              doy: 4 // 4 days need to be within the year to be considered the first week
          },
          dir: 'ltr',
          buttonText: {
              prev: 'prev',
              next: 'next',
              prevYear: 'prev year',
              nextYear: 'next year',
              year: 'year',
              today: 'today',
              month: 'month',
              week: 'week',
              day: 'day',
              list: 'list'
          },
          weekLabel: 'W',
          allDayText: 'all-day',
          eventLimitText: 'more',
          noEventsMessage: 'No events to display'
      };
      function parseRawLocales(explicitRawLocales) {
          var defaultCode = explicitRawLocales.length > 0 ? explicitRawLocales[0].code : 'en';
          var globalArray = window['FullCalendarLocalesAll'] || []; // from locales-all.js
          var globalObject = window['FullCalendarLocales'] || {}; // from locales/*.js. keys are meaningless
          var allRawLocales = globalArray.concat(// globalArray is low prio
          hashValuesToArray(globalObject), // medium prio
          explicitRawLocales // highest prio
          );
          var rawLocaleMap = {
              en: RAW_EN_LOCALE // necessary?
          };
          for (var _i = 0, allRawLocales_1 = allRawLocales; _i < allRawLocales_1.length; _i++) {
              var rawLocale = allRawLocales_1[_i];
              rawLocaleMap[rawLocale.code] = rawLocale;
          }
          return {
              map: rawLocaleMap,
              defaultCode: defaultCode
          };
      }
      function buildLocale(inputSingular, available) {
          if (typeof inputSingular === 'object' && !Array.isArray(inputSingular)) {
              return parseLocale(inputSingular.code, [inputSingular.code], inputSingular);
          }
          else {
              return queryLocale(inputSingular, available);
          }
      }
      function queryLocale(codeArg, available) {
          var codes = [].concat(codeArg || []); // will convert to array
          var raw = queryRawLocale(codes, available) || RAW_EN_LOCALE;
          return parseLocale(codeArg, codes, raw);
      }
      function queryRawLocale(codes, available) {
          for (var i = 0; i < codes.length; i++) {
              var parts = codes[i].toLocaleLowerCase().split('-');
              for (var j = parts.length; j > 0; j--) {
                  var simpleId = parts.slice(0, j).join('-');
                  if (available[simpleId]) {
                      return available[simpleId];
                  }
              }
          }
          return null;
      }
      function parseLocale(codeArg, codes, raw) {
          var merged = mergeProps([RAW_EN_LOCALE, raw], ['buttonText']);
          delete merged.code; // don't want this part of the options
          var week = merged.week;
          delete merged.week;
          return {
              codeArg: codeArg,
              codes: codes,
              week: week,
              simpleNumberFormat: new Intl.NumberFormat(codeArg),
              options: merged
          };
      }
  
      var OptionsManager = /** @class */ (function () {
          function OptionsManager(overrides) {
              this.overrides = __assign({}, overrides); // make a copy
              this.dynamicOverrides = {};
              this.compute();
          }
          OptionsManager.prototype.mutate = function (updates, removals, isDynamic) {
              if (!Object.keys(updates).length && !removals.length) {
                  return;
              }
              var overrideHash = isDynamic ? this.dynamicOverrides : this.overrides;
              __assign(overrideHash, updates);
              for (var _i = 0, removals_1 = removals; _i < removals_1.length; _i++) {
                  var propName = removals_1[_i];
                  delete overrideHash[propName];
              }
              this.compute();
          };
          // Computes the flattened options hash for the calendar and assigns to `this.options`.
          // Assumes this.overrides and this.dynamicOverrides have already been initialized.
          OptionsManager.prototype.compute = function () {
              // TODO: not a very efficient system
              var locales = firstDefined(// explicit locale option given?
              this.dynamicOverrides.locales, this.overrides.locales, globalDefaults.locales);
              var locale = firstDefined(// explicit locales option given?
              this.dynamicOverrides.locale, this.overrides.locale, globalDefaults.locale);
              var available = parseRawLocales(locales);
              var localeDefaults = buildLocale(locale || available.defaultCode, available.map).options;
              var dir = firstDefined(// based on options computed so far, is direction RTL?
              this.dynamicOverrides.dir, this.overrides.dir, localeDefaults.dir);
              var dirDefaults = dir === 'rtl' ? rtlDefaults : {};
              this.dirDefaults = dirDefaults;
              this.localeDefaults = localeDefaults;
              this.computed = mergeOptions([
                  globalDefaults,
                  dirDefaults,
                  localeDefaults,
                  this.overrides,
                  this.dynamicOverrides
              ]);
          };
          return OptionsManager;
      }());
  
      var calendarSystemClassMap = {};
      function registerCalendarSystem(name, theClass) {
          calendarSystemClassMap[name] = theClass;
      }
      function createCalendarSystem(name) {
          return new calendarSystemClassMap[name]();
      }
      var GregorianCalendarSystem = /** @class */ (function () {
          function GregorianCalendarSystem() {
          }
          GregorianCalendarSystem.prototype.getMarkerYear = function (d) {
              return d.getUTCFullYear();
          };
          GregorianCalendarSystem.prototype.getMarkerMonth = function (d) {
              return d.getUTCMonth();
          };
          GregorianCalendarSystem.prototype.getMarkerDay = function (d) {
              return d.getUTCDate();
          };
          GregorianCalendarSystem.prototype.arrayToMarker = function (arr) {
              return arrayToUtcDate(arr);
          };
          GregorianCalendarSystem.prototype.markerToArray = function (marker) {
              return dateToUtcArray(marker);
          };
          return GregorianCalendarSystem;
      }());
      registerCalendarSystem('gregory', GregorianCalendarSystem);
  
      var 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) {
          var m = ISO_RE.exec(str);
          if (m) {
              var 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)) {
                  var timeZoneOffset = null;
                  if (m[13]) {
                      timeZoneOffset = (m[15] === '-' ? -1 : 1) * (Number(m[16] || 0) * 60 +
                          Number(m[18] || 0));
                  }
                  return {
                      marker: marker,
                      isTimeUnspecified: !m[6],
                      timeZoneOffset: timeZoneOffset
                  };
              }
          }
          return null;
      }
  
      var DateEnv = /** @class */ (function () {
          function DateEnv(settings) {
              var timeZone = this.timeZone = settings.timeZone;
              var 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.weekLabel = settings.weekLabel != null ? settings.weekLabel : settings.locale.options.weekLabel;
              this.cmdFormatter = settings.cmdFormatter;
          }
          // Creating / Parsing
          DateEnv.prototype.createMarker = function (input) {
              var meta = this.createMarkerMeta(input);
              if (meta === null) {
                  return null;
              }
              return meta.marker;
          };
          DateEnv.prototype.createNowMarker = function () {
              if (this.canComputeOffset) {
                  return this.timestampToMarker(new Date().valueOf());
              }
              else {
                  // 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()));
              }
          };
          DateEnv.prototype.createMarkerMeta = function (input) {
              if (typeof input === 'string') {
                  return this.parse(input);
              }
              var 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: marker, isTimeUnspecified: false, forcedTzo: null };
          };
          DateEnv.prototype.parse = function (s) {
              var parts = parse(s);
              if (parts === null) {
                  return null;
              }
              var marker = parts.marker;
              var forcedTzo = null;
              if (parts.timeZoneOffset !== null) {
                  if (this.canComputeOffset) {
                      marker = this.timestampToMarker(marker.valueOf() - parts.timeZoneOffset * 60 * 1000);
                  }
                  else {
                      forcedTzo = parts.timeZoneOffset;
                  }
              }
              return { marker: marker, isTimeUnspecified: parts.isTimeUnspecified, forcedTzo: forcedTzo };
          };
          // Accessors
          DateEnv.prototype.getYear = function (marker) {
              return this.calendarSystem.getMarkerYear(marker);
          };
          DateEnv.prototype.getMonth = function (marker) {
              return this.calendarSystem.getMarkerMonth(marker);
          };
          // Adding / Subtracting
          DateEnv.prototype.add = function (marker, dur) {
              var 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);
          };
          DateEnv.prototype.subtract = function (marker, dur) {
              var 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);
          };
          DateEnv.prototype.addYears = function (marker, n) {
              var a = this.calendarSystem.markerToArray(marker);
              a[0] += n;
              return this.calendarSystem.arrayToMarker(a);
          };
          DateEnv.prototype.addMonths = function (marker, n) {
              var a = this.calendarSystem.markerToArray(marker);
              a[1] += n;
              return this.calendarSystem.arrayToMarker(a);
          };
          // Diffing Whole Units
          DateEnv.prototype.diffWholeYears = function (m0, m1) {
              var calendarSystem = this.calendarSystem;
              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;
          };
          DateEnv.prototype.diffWholeMonths = function (m0, m1) {
              var calendarSystem = this.calendarSystem;
              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
          DateEnv.prototype.greatestWholeUnit = function (m0, m1) {
              var 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() };
          };
          DateEnv.prototype.countDurationsBetween = function (m0, m1, d) {
              // TODO: can use greatestWholeUnit
              var 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
          DateEnv.prototype.startOf = function (m, unit) {
              if (unit === 'year') {
                  return this.startOfYear(m);
              }
              else if (unit === 'month') {
                  return this.startOfMonth(m);
              }
              else if (unit === 'week') {
                  return this.startOfWeek(m);
              }
              else if (unit === 'day') {
                  return startOfDay(m);
              }
              else if (unit === 'hour') {
                  return startOfHour(m);
              }
              else if (unit === 'minute') {
                  return startOfMinute(m);
              }
              else if (unit === 'second') {
                  return startOfSecond(m);
              }
          };
          DateEnv.prototype.startOfYear = function (m) {
              return this.calendarSystem.arrayToMarker([
                  this.calendarSystem.getMarkerYear(m)
              ]);
          };
          DateEnv.prototype.startOfMonth = function (m) {
              return this.calendarSystem.arrayToMarker([
                  this.calendarSystem.getMarkerYear(m),
                  this.calendarSystem.getMarkerMonth(m)
              ]);
          };
          DateEnv.prototype.startOfWeek = function (m) {
              return this.calendarSystem.arrayToMarker([
                  this.calendarSystem.getMarkerYear(m),
                  this.calendarSystem.getMarkerMonth(m),
                  m.getUTCDate() - ((m.getUTCDay() - this.weekDow + 7) % 7)
              ]);
          };
          // Week Number
          DateEnv.prototype.computeWeekNumber = function (marker) {
              if (this.weekNumberFunc) {
                  return this.weekNumberFunc(this.toDate(marker));
              }
              else {
                  return weekOfYear(marker, this.weekDow, this.weekDoy);
              }
          };
          // TODO: choke on timeZoneName: long
          DateEnv.prototype.format = function (marker, formatter, dateOptions) {
              if (dateOptions === void 0) { dateOptions = {}; }
              return formatter.format({
                  marker: marker,
                  timeZoneOffset: dateOptions.forcedTzo != null ?
                      dateOptions.forcedTzo :
                      this.offsetForMarker(marker)
              }, this);
          };
          DateEnv.prototype.formatRange = function (start, end, formatter, dateOptions) {
              if (dateOptions === void 0) { 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);
          };
          DateEnv.prototype.formatIso = function (marker, extraOptions) {
              if (extraOptions === void 0) { extraOptions = {}; }
              var timeZoneOffset = null;
              if (!extraOptions.omitTimeZoneOffset) {
                  if (extraOptions.forcedTzo != null) {
                      timeZoneOffset = extraOptions.forcedTzo;
                  }
                  else {
                      timeZoneOffset = this.offsetForMarker(marker);
                  }
              }
              return buildIsoString(marker, timeZoneOffset, extraOptions.omitTime);
          };
          // TimeZone
          DateEnv.prototype.timestampToMarker = function (ms) {
              if (this.timeZone === 'local') {
                  return arrayToUtcDate(dateToLocalArray(new Date(ms)));
              }
              else if (this.timeZone === 'UTC' || !this.namedTimeZoneImpl) {
                  return new Date(ms);
              }
              else {
                  return arrayToUtcDate(this.namedTimeZoneImpl.timestampToArray(ms));
              }
          };
          DateEnv.prototype.offsetForMarker = function (m) {
              if (this.timeZone === 'local') {
                  return -arrayToLocalDate(dateToUtcArray(m)).getTimezoneOffset(); // convert "inverse" offset to "normal" offset
              }
              else if (this.timeZone === 'UTC') {
                  return 0;
              }
              else if (this.namedTimeZoneImpl) {
                  return this.namedTimeZoneImpl.offsetForArray(dateToUtcArray(m));
              }
              return null;
          };
          // Conversion
          DateEnv.prototype.toDate = function (m, forcedTzo) {
              if (this.timeZone === 'local') {
                  return arrayToLocalDate(dateToUtcArray(m));
              }
              else if (this.timeZone === 'UTC') {
                  return new Date(m.valueOf()); // make sure it's a copy
              }
              else if (!this.namedTimeZoneImpl) {
                  return new Date(m.valueOf() - (forcedTzo || 0));
              }
              else {
                  return new Date(m.valueOf() -
                      this.namedTimeZoneImpl.offsetForArray(dateToUtcArray(m)) * 1000 * 60 // convert minutes -> ms
                  );
              }
          };
          return DateEnv;
      }());
  
      var SIMPLE_SOURCE_PROPS = {
          id: String,
          allDayDefault: Boolean,
          eventDataTransform: Function,
          success: Function,
          failure: Function
      };
      var uid$2 = 0;
      function doesSourceNeedRange(eventSource, calendar) {
          var defs = calendar.pluginSystem.hooks.eventSourceDefs;
          return !defs[eventSource.sourceDefId].ignoreRange;
      }
      function parseEventSource(raw, calendar) {
          var defs = calendar.pluginSystem.hooks.eventSourceDefs;
          for (var i = defs.length - 1; i >= 0; i--) { // later-added plugins take precedence
              var def = defs[i];
              var meta = def.parseMeta(raw);
              if (meta) {
                  var res = parseEventSourceProps(typeof raw === 'object' ? raw : {}, meta, i, calendar);
                  res._raw = raw;
                  return res;
              }
          }
          return null;
      }
      function parseEventSourceProps(raw, meta, sourceDefId, calendar) {
          var leftovers0 = {};
          var props = refineProps(raw, SIMPLE_SOURCE_PROPS, {}, leftovers0);
          var leftovers1 = {};
          var ui = processUnscopedUiProps(leftovers0, calendar, leftovers1);
          props.isFetching = false;
          props.latestFetchId = '';
          props.fetchRange = null;
          props.publicId = String(raw.id || '');
          props.sourceId = String(uid$2++);
          props.sourceDefId = sourceDefId;
          props.meta = meta;
          props.ui = ui;
          props.extendedProps = leftovers1;
          return props;
      }
  
      function reduceEventSources (eventSources, action, dateProfile, calendar) {
          switch (action.type) {
              case 'ADD_EVENT_SOURCES': // already parsed
                  return addSources(eventSources, action.sources, dateProfile ? dateProfile.activeRange : null, calendar);
              case 'REMOVE_EVENT_SOURCE':
                  return removeSource(eventSources, action.sourceId);
              case 'PREV': // TODO: how do we track all actions that affect dateProfile :(
              case 'NEXT':
              case 'SET_DATE':
              case 'SET_VIEW_TYPE':
                  if (dateProfile) {
                      return fetchDirtySources(eventSources, dateProfile.activeRange, calendar);
                  }
                  else {
                      return eventSources;
                  }
              case 'FETCH_EVENT_SOURCES':
              case 'CHANGE_TIMEZONE':
                  return fetchSourcesByIds(eventSources, action.sourceIds ?
                      arrayToHash(action.sourceIds) :
                      excludeStaticSources(eventSources, calendar), dateProfile ? dateProfile.activeRange : null, calendar);
              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;
          }
      }
      var uid$3 = 0;
      function addSources(eventSourceHash, sources, fetchRange, calendar) {
          var hash = {};
          for (var _i = 0, sources_1 = sources; _i < sources_1.length; _i++) {
              var source = sources_1[_i];
              hash[source.sourceId] = source;
          }
          if (fetchRange) {
              hash = fetchDirtySources(hash, fetchRange, calendar);
          }
          return __assign({}, eventSourceHash, hash);
      }
      function removeSource(eventSourceHash, sourceId) {
          return filterHash(eventSourceHash, function (eventSource) {
              return eventSource.sourceId !== sourceId;
          });
      }
      function fetchDirtySources(sourceHash, fetchRange, calendar) {
          return fetchSourcesByIds(sourceHash, filterHash(sourceHash, function (eventSource) {
              return isSourceDirty(eventSource, fetchRange, calendar);
          }), fetchRange, calendar);
      }
      function isSourceDirty(eventSource, fetchRange, calendar) {
          if (!doesSourceNeedRange(eventSource, calendar)) {
              return !eventSource.latestFetchId;
          }
          else {
              return !calendar.opt('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, calendar) {
          var nextSources = {};
          for (var sourceId in prevSources) {
              var source = prevSources[sourceId];
              if (sourceIdHash[sourceId]) {
                  nextSources[sourceId] = fetchSource(source, fetchRange, calendar);
              }
              else {
                  nextSources[sourceId] = source;
              }
          }
          return nextSources;
      }
      function fetchSource(eventSource, fetchRange, calendar) {
          var sourceDef = calendar.pluginSystem.hooks.eventSourceDefs[eventSource.sourceDefId];
          var fetchId = String(uid$3++);
          sourceDef.fetch({
              eventSource: eventSource,
              calendar: calendar,
              range: fetchRange
          }, function (res) {
              var rawEvents = res.rawEvents;
              var calSuccess = calendar.opt('eventSourceSuccess');
              var calSuccessRes;
              var sourceSuccessRes;
              if (eventSource.success) {
                  sourceSuccessRes = eventSource.success(rawEvents, res.xhr);
              }
              if (calSuccess) {
                  calSuccessRes = calSuccess(rawEvents, res.xhr);
              }
              rawEvents = sourceSuccessRes || calSuccessRes || rawEvents;
              calendar.dispatch({
                  type: 'RECEIVE_EVENTS',
                  sourceId: eventSource.sourceId,
                  fetchId: fetchId,
                  fetchRange: fetchRange,
                  rawEvents: rawEvents
              });
          }, function (error) {
              var callFailure = calendar.opt('eventSourceFailure');
              console.warn(error.message, error);
              if (eventSource.failure) {
                  eventSource.failure(error);
              }
              if (callFailure) {
                  callFailure(error);
              }
              calendar.dispatch({
                  type: 'RECEIVE_EVENT_ERROR',
                  sourceId: eventSource.sourceId,
                  fetchId: fetchId,
                  fetchRange: fetchRange,
                  error: error
              });
          });
          return __assign({}, eventSource, { isFetching: true, latestFetchId: fetchId });
      }
      function receiveResponse(sourceHash, sourceId, fetchId, fetchRange) {
          var _a;
          var eventSource = sourceHash[sourceId];
          if (eventSource && // not already removed
              fetchId === eventSource.latestFetchId) {
              return __assign({}, sourceHash, (_a = {}, _a[sourceId] = __assign({}, eventSource, { isFetching: false, fetchRange: fetchRange // also serves as a marker that at least one fetch has completed
               }), _a));
          }
          return sourceHash;
      }
      function excludeStaticSources(eventSources, calendar) {
          return filterHash(eventSources, function (eventSource) {
              return doesSourceNeedRange(eventSource, calendar);
          });
      }
  
      var DateProfileGenerator = /** @class */ (function () {
          function DateProfileGenerator(viewSpec, calendar) {
              this.viewSpec = viewSpec;
              this.options = viewSpec.options;
              this.dateEnv = calendar.dateEnv;
              this.calendar = calendar;
              this.initHiddenDays();
          }
          /* Date Range Computation
          ------------------------------------------------------------------------------------------------------------------*/
          // Builds a structure with info about what the dates/ranges will be for the "prev" view.
          DateProfileGenerator.prototype.buildPrev = function (currentDateProfile, currentDate) {
              var dateEnv = this.dateEnv;
              var prevDate = dateEnv.subtract(dateEnv.startOf(currentDate, currentDateProfile.currentRangeUnit), // important for start-of-month
              currentDateProfile.dateIncrement);
              return this.build(prevDate, -1);
          };
          // Builds a structure with info about what the dates/ranges will be for the "next" view.
          DateProfileGenerator.prototype.buildNext = function (currentDateProfile, currentDate) {
              var dateEnv = this.dateEnv;
              var nextDate = dateEnv.add(dateEnv.startOf(currentDate, currentDateProfile.currentRangeUnit), // important for start-of-month
              currentDateProfile.dateIncrement);
              return this.build(nextDate, 1);
          };
          // 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).
          DateProfileGenerator.prototype.build = function (currentDate, direction, forceToValid) {
              if (forceToValid === void 0) { forceToValid = false; }
              var validRange;
              var minTime = null;
              var maxTime = null;
              var currentInfo;
              var isRangeAllDay;
              var renderRange;
              var activeRange;
              var 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 (!this.options.showNonCurrentDates) {
                  activeRange = intersectRanges(activeRange, currentInfo.range);
              }
              minTime = createDuration(this.options.minTime);
              maxTime = createDuration(this.options.maxTime);
              activeRange = this.adjustActiveRange(activeRange, minTime, maxTime);
              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);
              return {
                  // 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: 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: isRangeAllDay,
                  // dates that display events and accept drag-n-drop
                  // will be `null` if no dates accept events
                  activeRange: activeRange,
                  // date range with a rendered skeleton
                  // includes not-active days that need some sort of DOM
                  renderRange: renderRange,
                  // Duration object that denotes the first visible time of any given day
                  minTime: minTime,
                  // Duration object that denotes the exclusive visible end time of any given day
                  maxTime: maxTime,
                  isValid: 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.
          DateProfileGenerator.prototype.buildValidRange = function () {
              return this.getRangeOption('validRange', this.calendar.getNow()) ||
                  { 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.
          DateProfileGenerator.prototype.buildCurrentRangeInfo = function (date, direction) {
              var _a = this, viewSpec = _a.viewSpec, dateEnv = _a.dateEnv;
              var duration = null;
              var unit = null;
              var range = null;
              var dayCount;
              if (viewSpec.duration) {
                  duration = viewSpec.duration;
                  unit = viewSpec.durationUnit;
                  range = this.buildRangeFromDuration(date, direction, duration, unit);
              }
              else if ((dayCount = this.options.dayCount)) {
                  unit = 'day';
                  range = this.buildRangeFromDayCount(date, direction, dayCount);
              }
              else if ((range = this.buildCustomVisibleRange(date))) {
                  unit = dateEnv.greatestWholeUnit(range.start, range.end).unit;
              }
              else {
                  duration = this.getFallbackDuration();
                  unit = greatestDurationDenominator(duration).unit;
                  range = this.buildRangeFromDuration(date, direction, duration, unit);
              }
              return { duration: duration, unit: unit, range: range };
          };
          DateProfileGenerator.prototype.getFallbackDuration = function () {
              return createDuration({ day: 1 });
          };
          // Returns a new activeRange to have time values (un-ambiguate)
          // minTime or maxTime causes the range to expand.
          DateProfileGenerator.prototype.adjustActiveRange = function (range, minTime, maxTime) {
              var dateEnv = this.dateEnv;
              var start = range.start;
              var end = range.end;
              if (this.viewSpec.class.prototype.usesMinMaxTime) {
                  // expand active range if minTime is negative (why not when positive?)
                  if (asRoughDays(minTime) < 0) {
                      start = startOfDay(start); // necessary?
                      start = dateEnv.add(start, minTime);
                  }
                  // expand active range if maxTime is beyond one day (why not when positive?)
                  if (asRoughDays(maxTime) > 1) {
                      end = startOfDay(end); // necessary?
                      end = addDays(end, -1);
                      end = dateEnv.add(end, maxTime);
                  }
              }
              return { start: start, end: end };
          };
          // Builds the "current" range when it is specified as an explicit duration.
          // `unit` is the already-computed greatestDurationDenominator unit of duration.
          DateProfileGenerator.prototype.buildRangeFromDuration = function (date, direction, duration, unit) {
              var dateEnv = this.dateEnv;
              var alignment = this.options.dateAlignment;
              var dateIncrementInput;
              var dateIncrementDuration;
              var start;
              var end;
              var res;
              // compute what the alignment should be
              if (!alignment) {
                  dateIncrementInput = this.options.dateIncrement;
                  if (dateIncrementInput) {
                      dateIncrementDuration = createDuration(dateIncrementInput);
                      // use the smaller of the two units
                      if (asRoughMs(dateIncrementDuration) < asRoughMs(duration)) {
                          alignment = greatestDurationDenominator(dateIncrementDuration, !getWeeksFromInput(dateIncrementInput)).unit;
                      }
                      else {
                          alignment = unit;
                      }
                  }
                  else {
                      alignment = 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, alignment);
                  end = dateEnv.add(start, duration);
                  res = { start: start, end: 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.
          DateProfileGenerator.prototype.buildRangeFromDayCount = function (date, direction, dayCount) {
              var dateEnv = this.dateEnv;
              var customAlignment = this.options.dateAlignment;
              var runningCount = 0;
              var start = date;
              var end;
              if (customAlignment) {
                  start = dateEnv.startOf(start, customAlignment);
              }
              start = startOfDay(start);
              start = this.skipHiddenDays(start, direction);
              end = start;
              do {
                  end = addDays(end, 1);
                  if (!this.isHiddenDay(end)) {
                      runningCount++;
                  }
              } while (runningCount < dayCount);
              return { start: start, end: end };
          };
          // Builds a normalized range object for the "visible" range,
          // which is a way to define the currentRange and activeRange at the same time.
          DateProfileGenerator.prototype.buildCustomVisibleRange = function (date) {
              var dateEnv = this.dateEnv;
              var visibleRange = this.getRangeOption('visibleRange', dateEnv.toDate(date));
              if (visibleRange && (visibleRange.start == null || visibleRange.end == null)) {
                  return null;
              }
              return visibleRange;
          };
          // Computes the range that will represent the element/cells for *rendering*,
          // but which may have voided days/times.
          // not responsible for trimming hidden days.
          DateProfileGenerator.prototype.buildRenderRange = function (currentRange, currentRangeUnit, isRangeAllDay) {
              return currentRange;
          };
          // Compute the duration value that should be added/substracted to the current date
          // when a prev/next operation happens.
          DateProfileGenerator.prototype.buildDateIncrement = function (fallback) {
              var dateIncrementInput = this.options.dateIncrement;
              var customAlignment;
              if (dateIncrementInput) {
                  return createDuration(dateIncrementInput);
              }
              else if ((customAlignment = this.options.dateAlignment)) {
                  return createDuration(1, customAlignment);
              }
              else if (fallback) {
                  return fallback;
              }
              else {
                  return createDuration({ days: 1 });
              }
          };
          // Arguments after name will be forwarded to a hypothetical function value
          // WARNING: passed-in arguments will be given to generator functions as-is and can cause side-effects.
          // Always clone your objects if you fear mutation.
          DateProfileGenerator.prototype.getRangeOption = function (name) {
              var otherArgs = [];
              for (var _i = 1; _i < arguments.length; _i++) {
                  otherArgs[_i - 1] = arguments[_i];
              }
              var val = this.options[name];
              if (typeof val === 'function') {
                  val = val.apply(null, otherArgs);
              }
              if (val) {
                  val = parseRange(val, this.dateEnv);
              }
              if (val) {
                  val = computeVisibleDayRange(val);
              }
              return val;
          };
          /* Hidden Days
          ------------------------------------------------------------------------------------------------------------------*/
          // Initializes internal variables related to calculating hidden days-of-week
          DateProfileGenerator.prototype.initHiddenDays = function () {
              var hiddenDays = this.options.hiddenDays || []; // array of day-of-week indices that are hidden
              var isHiddenDayHash = []; // is the day-of-week hidden? (hash with day-of-week-index -> bool)
              var dayCnt = 0;
              var i;
              if (this.options.weekends === false) {
                  hiddenDays.push(0, 6); // 0=sunday, 6=saturday
              }
              for (i = 0; i < 7; i++) {
                  if (!(isHiddenDayHash[i] = hiddenDays.indexOf(i) !== -1)) {
                      dayCnt++;
                  }
              }
              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
          DateProfileGenerator.prototype.trimHiddenDays = function (range) {
              var start = range.start;
              var end = range.end;
              if (start) {
                  start = this.skipHiddenDays(start);
              }
              if (end) {
                  end = this.skipHiddenDays(end, -1, true);
              }
              if (start == null || end == null || start < end) {
                  return { start: start, end: end };
              }
              return null;
          };
          // Is the current day hidden?
          // `day` is a day-of-week index (0-6), or a Date (used for UTC)
          DateProfileGenerator.prototype.isHiddenDay = function (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)
          DateProfileGenerator.prototype.skipHiddenDays = function (date, inc, isExclusive) {
              if (inc === void 0) { inc = 1; }
              if (isExclusive === void 0) { isExclusive = false; }
              while (this.isHiddenDayHash[(date.getUTCDay() + (isExclusive ? inc : 0) + 7) % 7]) {
                  date = addDays(date, inc);
              }
              return date;
          };
          return DateProfileGenerator;
      }());
      // TODO: find a way to avoid comparing DateProfiles. it's tedious
      function isDateProfilesEqual(p0, p1) {
          return rangesEqual(p0.validRange, p1.validRange) &&
              rangesEqual(p0.activeRange, p1.activeRange) &&
              rangesEqual(p0.renderRange, p1.renderRange) &&
              durationsEqual(p0.minTime, p1.minTime) &&
              durationsEqual(p0.maxTime, p1.maxTime);
          /*
          TODO: compare more?
            currentRange: DateRange
            currentRangeUnit: string
            isRangeAllDay: boolean
            isValid: boolean
            dateIncrement: Duration
          */
      }
  
      function reduce (state, action, calendar) {
          var viewType = reduceViewType(state.viewType, action);
          var dateProfile = reduceDateProfile(state.dateProfile, action, state.currentDate, viewType, calendar);
          var eventSources = reduceEventSources(state.eventSources, action, dateProfile, calendar);
          var nextState = __assign({}, state, { viewType: viewType,
              dateProfile: dateProfile, currentDate: reduceCurrentDate(state.currentDate, action, dateProfile), eventSources: eventSources, eventStore: reduceEventStore(state.eventStore, action, eventSources, dateProfile, calendar), dateSelection: reduceDateSelection(state.dateSelection, action, calendar), eventSelection: reduceSelectedEvent(state.eventSelection, action), eventDrag: reduceEventDrag(state.eventDrag, action, eventSources, calendar), eventResize: reduceEventResize(state.eventResize, action, eventSources, calendar), eventSourceLoadingLevel: computeLoadingLevel(eventSources), loadingLevel: computeLoadingLevel(eventSources) });
          for (var _i = 0, _a = calendar.pluginSystem.hooks.reducers; _i < _a.length; _i++) {
              var reducerFunc = _a[_i];
              nextState = reducerFunc(nextState, action, calendar);
          }
          // console.log(action.type, nextState)
          return nextState;
      }
      function reduceViewType(currentViewType, action) {
          switch (action.type) {
              case 'SET_VIEW_TYPE':
                  return action.viewType;
              default:
                  return currentViewType;
          }
      }
      function reduceDateProfile(currentDateProfile, action, currentDate, viewType, calendar) {
          var newDateProfile;
          switch (action.type) {
              case 'PREV':
                  newDateProfile = calendar.dateProfileGenerators[viewType].buildPrev(currentDateProfile, currentDate);
                  break;
              case 'NEXT':
                  newDateProfile = calendar.dateProfileGenerators[viewType].buildNext(currentDateProfile, currentDate);
                  break;
              case 'SET_DATE':
                  if (!currentDateProfile.activeRange ||
                      !rangeContainsMarker(currentDateProfile.currentRange, action.dateMarker)) {
                      newDateProfile = calendar.dateProfileGenerators[viewType].build(action.dateMarker, undefined, true // forceToValid
                      );
                  }
                  break;
              case 'SET_VIEW_TYPE':
                  var generator = calendar.dateProfileGenerators[viewType];
                  if (!generator) {
                      throw new Error(viewType ?
                          'The FullCalendar view "' + viewType + '" does not exist. Make sure your plugins are loaded correctly.' :
                          'No available FullCalendar view plugins.');
                  }
                  newDateProfile = generator.build(action.dateMarker || currentDate, undefined, true // forceToValid
                  );
                  break;
          }
          if (newDateProfile &&
              newDateProfile.isValid &&
              !(currentDateProfile && isDateProfilesEqual(currentDateProfile, newDateProfile))) {
              return newDateProfile;
          }
          else {
              return currentDateProfile;
          }
      }
      function reduceCurrentDate(currentDate, action, dateProfile) {
          switch (action.type) {
              case 'PREV':
              case 'NEXT':
                  if (!rangeContainsMarker(dateProfile.currentRange, currentDate)) {
                      return dateProfile.currentRange.start;
                  }
                  else {
                      return currentDate;
                  }
              case 'SET_DATE':
              case 'SET_VIEW_TYPE':
                  var newDate = action.dateMarker || currentDate;
                  if (dateProfile.activeRange && !rangeContainsMarker(dateProfile.activeRange, newDate)) {
                      return dateProfile.currentRange.start;
                  }
                  else {
                      return newDate;
                  }
              default:
                  return currentDate;
          }
      }
      function reduceDateSelection(currentSelection, action, calendar) {
          switch (action.type) {
              case 'SELECT_DATES':
                  return action.selection;
              case 'UNSELECT_DATES':
                  return null;
              default:
                  return currentSelection;
          }
      }
      function reduceSelectedEvent(currentInstanceId, action) {
          switch (action.type) {
              case 'SELECT_EVENT':
                  return action.eventInstanceId;
              case 'UNSELECT_EVENT':
                  return '';
              default:
                  return currentInstanceId;
          }
      }
      function reduceEventDrag(currentDrag, action, sources, calendar) {
          switch (action.type) {
              case 'SET_EVENT_DRAG':
                  var newDrag = action.state;
                  return {
                      affectedEvents: newDrag.affectedEvents,
                      mutatedEvents: newDrag.mutatedEvents,
                      isEvent: newDrag.isEvent,
                      origSeg: newDrag.origSeg
                  };
              case 'UNSET_EVENT_DRAG':
                  return null;
              default:
                  return currentDrag;
          }
      }
      function reduceEventResize(currentResize, action, sources, calendar) {
          switch (action.type) {
              case 'SET_EVENT_RESIZE':
                  var newResize = action.state;
                  return {
                      affectedEvents: newResize.affectedEvents,
                      mutatedEvents: newResize.mutatedEvents,
                      isEvent: newResize.isEvent,
                      origSeg: newResize.origSeg
                  };
              case 'UNSET_EVENT_RESIZE':
                  return null;
              default:
                  return currentResize;
          }
      }
      function computeLoadingLevel(eventSources) {
          var cnt = 0;
          for (var sourceId in eventSources) {
              if (eventSources[sourceId].isFetching) {
                  cnt++;
              }
          }
          return cnt;
      }
  
      var STANDARD_PROPS = {
          start: null,
          end: null,
          allDay: Boolean
      };
      function parseDateSpan(raw, dateEnv, defaultDuration) {
          var span = parseOpenDateSpan(raw, dateEnv);
          var range = span.range;
          if (!range.start) {
              return null;
          }
          if (!range.end) {
              if (defaultDuration == null) {
                  return null;
              }
              else {
                  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) {
          var leftovers = {};
          var standardProps = refineProps(raw, STANDARD_PROPS, {}, leftovers);
          var startMeta = standardProps.start ? dateEnv.createMarkerMeta(standardProps.start) : null;
          var endMeta = standardProps.end ? dateEnv.createMarkerMeta(standardProps.end) : null;
          var allDay = standardProps.allDay;
          if (allDay == null) {
              allDay = (startMeta && startMeta.isTimeUnspecified) &&
                  (!endMeta || endMeta.isTimeUnspecified);
          }
          // use this leftover object as the selection object
          leftovers.range = {
              start: startMeta ? startMeta.marker : null,
              end: endMeta ? endMeta.marker : null
          };
          leftovers.allDay = allDay;
          return leftovers;
      }
      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 (var 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 (var propName in span0) {
              if (!(propName in span1)) {
                  return false;
              }
          }
          return true;
      }
      function buildDateSpanApi(span, dateEnv) {
          return {
              start: dateEnv.toDate(span.range.start),
              end: dateEnv.toDate(span.range.end),
              startStr: dateEnv.formatIso(span.range.start, { omitTime: span.allDay }),
              endStr: dateEnv.formatIso(span.range.end, { omitTime: span.allDay }),
              allDay: span.allDay
          };
      }
      function buildDatePointApi(span, dateEnv) {
          return {
              date: dateEnv.toDate(span.range.start),
              dateStr: dateEnv.formatIso(span.range.start, { omitTime: span.allDay }),
              allDay: span.allDay
          };
      }
      function fabricateEventRange(dateSpan, eventUiBases, calendar) {
          var def = parseEventDef({ editable: false }, '', // sourceId
          dateSpan.allDay, true, // hasEnd
          calendar);
          return {
              def: def,
              ui: compileEventUi(def, eventUiBases),
              instance: createEventInstance(def.defId, dateSpan.range),
              range: dateSpan.range,
              isStart: true,
              isEnd: true
          };
      }
  
      function compileViewDefs(defaultConfigs, overrideConfigs) {
          var hash = {};
          var 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];
          }
          var viewDef = buildViewDef(viewType, hash, defaultConfigs, overrideConfigs);
          if (viewDef) {
              hash[viewType] = viewDef;
          }
          return viewDef;
      }
      function buildViewDef(viewType, hash, defaultConfigs, overrideConfigs) {
          var defaultConfig = defaultConfigs[viewType];
          var overrideConfig = overrideConfigs[viewType];
          var queryProp = function (name) {
              return (defaultConfig && defaultConfig[name] !== null) ? defaultConfig[name] :
                  ((overrideConfig && overrideConfig[name] !== null) ? overrideConfig[name] : null);
          };
          var theClass = queryProp('class');
          var superType = queryProp('superType');
          if (!superType && theClass) {
              superType =
                  findViewNameBySubclass(theClass, overrideConfigs) ||
                      findViewNameBySubclass(theClass, defaultConfigs);
          }
          var 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 (!theClass && superDef) {
              theClass = superDef.class;
          }
          if (!theClass) {
              return null; // don't throw a warning, might be settings for a single-unit view
          }
          return {
              type: viewType,
              class: theClass,
              defaults: __assign({}, (superDef ? superDef.defaults : {}), (defaultConfig ? defaultConfig.options : {})),
              overrides: __assign({}, (superDef ? superDef.overrides : {}), (overrideConfig ? overrideConfig.options : {}))
          };
      }
      function findViewNameBySubclass(viewSubclass, configs) {
          var superProto = Object.getPrototypeOf(viewSubclass.prototype);
          for (var viewType in configs) {
              var parsed = configs[viewType];
              // need DIRECT subclass, so instanceof won't do it
              if (parsed.class && parsed.class.prototype === superProto) {
                  return viewType;
              }
          }
          return '';
      }
  
      function parseViewConfigs(inputs) {
          return mapHash(inputs, parseViewConfig);
      }
      var VIEW_DEF_PROPS = {
          type: String,
          class: null
      };
      function parseViewConfig(input) {
          if (typeof input === 'function') {
              input = { class: input };
          }
          var options = {};
          var props = refineProps(input, VIEW_DEF_PROPS, {}, options);
          return {
              superType: props.type,
              class: props.class,
              options: options
          };
      }
  
      function buildViewSpecs(defaultInputs, optionsManager) {
          var defaultConfigs = parseViewConfigs(defaultInputs);
          var overrideConfigs = parseViewConfigs(optionsManager.overrides.views);
          var viewDefs = compileViewDefs(defaultConfigs, overrideConfigs);
          return mapHash(viewDefs, function (viewDef) {
              return buildViewSpec(viewDef, overrideConfigs, optionsManager);
          });
      }
      function buildViewSpec(viewDef, overrideConfigs, optionsManager) {
          var durationInput = viewDef.overrides.duration ||
              viewDef.defaults.duration ||
              optionsManager.dynamicOverrides.duration ||
              optionsManager.overrides.duration;
          var duration = null;
          var durationUnit = '';
          var singleUnit = '';
          var singleUnitOverrides = {};
          if (durationInput) {
              duration = createDuration(durationInput);
              if (duration) { // valid?
                  var denom = greatestDurationDenominator(duration, !getWeeksFromInput(durationInput));
                  durationUnit = denom.unit;
                  if (denom.value === 1) {
                      singleUnit = durationUnit;
                      singleUnitOverrides = overrideConfigs[durationUnit] ? overrideConfigs[durationUnit].options : {};
                  }
              }
          }
          var queryButtonText = function (options) {
              var buttonTextMap = options.buttonText || {};
              var 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 {
              type: viewDef.type,
              class: viewDef.class,
              duration: duration,
              durationUnit: durationUnit,
              singleUnit: singleUnit,
              options: __assign({}, globalDefaults, viewDef.defaults, optionsManager.dirDefaults, optionsManager.localeDefaults, optionsManager.overrides, singleUnitOverrides, viewDef.overrides, optionsManager.dynamicOverrides),
              buttonTextOverride: queryButtonText(optionsManager.dynamicOverrides) ||
                  queryButtonText(optionsManager.overrides) || // constructor-specified buttonText lookup hash takes precedence
                  viewDef.overrides.buttonText,
              buttonTextDefault: queryButtonText(optionsManager.localeDefaults) ||
                  queryButtonText(optionsManager.dirDefaults) ||
                  viewDef.defaults.buttonText ||
                  queryButtonText(globalDefaults) ||
                  viewDef.type // fall back to given view name
          };
      }
  
      var Toolbar = /** @class */ (function (_super) {
          __extends(Toolbar, _super);
          function Toolbar(extraClassName) {
              var _this = _super.call(this) || this;
              _this._renderLayout = memoizeRendering(_this.renderLayout, _this.unrenderLayout);
              _this._updateTitle = memoizeRendering(_this.updateTitle, null, [_this._renderLayout]);
              _this._updateActiveButton = memoizeRendering(_this.updateActiveButton, null, [_this._renderLayout]);
              _this._updateToday = memoizeRendering(_this.updateToday, null, [_this._renderLayout]);
              _this._updatePrev = memoizeRendering(_this.updatePrev, null, [_this._renderLayout]);
              _this._updateNext = memoizeRendering(_this.updateNext, null, [_this._renderLayout]);
              _this.el = createElement('div', { className: 'fc-toolbar ' + extraClassName });
              return _this;
          }
          Toolbar.prototype.destroy = function () {
              _super.prototype.destroy.call(this);
              this._renderLayout.unrender(); // should unrender everything else
              removeElement(this.el);
          };
          Toolbar.prototype.render = function (props) {
              this._renderLayout(props.layout);
              this._updateTitle(props.title);
              this._updateActiveButton(props.activeButton);
              this._updateToday(props.isTodayEnabled);
              this._updatePrev(props.isPrevEnabled);
              this._updateNext(props.isNextEnabled);
          };
          Toolbar.prototype.renderLayout = function (layout) {
              var el = this.el;
              this.viewsWithButtons = [];
              appendToElement(el, this.renderSection('left', layout.left));
              appendToElement(el, this.renderSection('center', layout.center));
              appendToElement(el, this.renderSection('right', layout.right));
          };
          Toolbar.prototype.unrenderLayout = function () {
              this.el.innerHTML = '';
          };
          Toolbar.prototype.renderSection = function (position, buttonStr) {
              var _this = this;
              var _a = this.context, theme = _a.theme, calendar = _a.calendar;
              var optionsManager = calendar.optionsManager;
              var viewSpecs = calendar.viewSpecs;
              var sectionEl = createElement('div', { className: 'fc-' + position });
              var calendarCustomButtons = optionsManager.computed.customButtons || {};
              var calendarButtonTextOverrides = optionsManager.overrides.buttonText || {};
              var calendarButtonText = optionsManager.computed.buttonText || {};
              if (buttonStr) {
                  buttonStr.split(' ').forEach(function (buttonGroupStr, i) {
                      var groupChildren = [];
                      var isOnlyButtons = true;
                      var groupEl;
                      buttonGroupStr.split(',').forEach(function (buttonName, j) {
                          var customButtonProps;
                          var viewSpec;
                          var buttonClick;
                          var buttonIcon; // only one of these will be set
                          var buttonText; // "
                          var buttonInnerHtml;
                          var buttonClasses;
                          var buttonEl;
                          var buttonAriaAttr;
                          if (buttonName === 'title') {
                              groupChildren.push(htmlToElement('<h2>&nbsp;</h2>')); // we always want it to take up height
                              isOnlyButtons = false;
                          }
                          else {
                              if ((customButtonProps = calendarCustomButtons[buttonName])) {
                                  buttonClick = function (ev) {
                                      if (customButtonProps.click) {
                                          customButtonProps.click.call(buttonEl, ev);
                                      }
                                  };
                                  (buttonIcon = theme.getCustomButtonIconClass(customButtonProps)) ||
                                      (buttonIcon = theme.getIconClass(buttonName)) ||
                                      (buttonText = customButtonProps.text);
                              }
                              else if ((viewSpec = viewSpecs[buttonName])) {
                                  _this.viewsWithButtons.push(buttonName);
                                  buttonClick = function () {
                                      calendar.changeView(buttonName);
                                  };
                                  (buttonText = viewSpec.buttonTextOverride) ||
                                      (buttonIcon = theme.getIconClass(buttonName)) ||
                                      (buttonText = viewSpec.buttonTextDefault);
                              }
                              else if (calendar[buttonName]) { // a calendar method
                                  buttonClick = function () {
                                      calendar[buttonName]();
                                  };
                                  (buttonText = calendarButtonTextOverrides[buttonName]) ||
                                      (buttonIcon = theme.getIconClass(buttonName)) ||
                                      (buttonText = calendarButtonText[buttonName]);
                                  //            ^ everything else is considered default
                              }
                              if (buttonClick) {
                                  buttonClasses = [
                                      'fc-' + buttonName + '-button',
                                      theme.getClass('button')
                                  ];
                                  if (buttonText) {
                                      buttonInnerHtml = htmlEscape(buttonText);
                                      buttonAriaAttr = '';
                                  }
                                  else if (buttonIcon) {
                                      buttonInnerHtml = "<span class='" + buttonIcon + "'></span>";
                                      buttonAriaAttr = ' aria-label="' + buttonName + '"';
                                  }
                                  buttonEl = htmlToElement(// type="button" so that it doesn't submit a form
                                  '<button type="button" class="' + buttonClasses.join(' ') + '"' +
                                      buttonAriaAttr +
                                      '>' + buttonInnerHtml + '</button>');
                                  buttonEl.addEventListener('click', buttonClick);
                                  groupChildren.push(buttonEl);
                              }
                          }
                      });
                      if (groupChildren.length > 1) {
                          groupEl = document.createElement('div');
                          var buttonGroupClassName = theme.getClass('buttonGroup');
                          if (isOnlyButtons && buttonGroupClassName) {
                              groupEl.classList.add(buttonGroupClassName);
                          }
                          appendToElement(groupEl, groupChildren);
                          sectionEl.appendChild(groupEl);
                      }
                      else {
                          appendToElement(sectionEl, groupChildren); // 1 or 0 children
                      }
                  });
              }
              return sectionEl;
          };
          Toolbar.prototype.updateToday = function (isTodayEnabled) {
              this.toggleButtonEnabled('today', isTodayEnabled);
          };
          Toolbar.prototype.updatePrev = function (isPrevEnabled) {
              this.toggleButtonEnabled('prev', isPrevEnabled);
          };
          Toolbar.prototype.updateNext = function (isNextEnabled) {
              this.toggleButtonEnabled('next', isNextEnabled);
          };
          Toolbar.prototype.updateTitle = function (text) {
              findElements(this.el, 'h2').forEach(function (titleEl) {
                  titleEl.innerText = text;
              });
          };
          Toolbar.prototype.updateActiveButton = function (buttonName) {
              var theme = this.context.theme;
              var className = theme.getClass('buttonActive');
              findElements(this.el, 'button').forEach(function (buttonEl) {
                  if (buttonName && buttonEl.classList.contains('fc-' + buttonName + '-button')) {
                      buttonEl.classList.add(className);
                  }
                  else {
                      buttonEl.classList.remove(className);
                  }
              });
          };
          Toolbar.prototype.toggleButtonEnabled = function (buttonName, bool) {
              findElements(this.el, '.fc-' + buttonName + '-button').forEach(function (buttonEl) {
                  buttonEl.disabled = !bool;
              });
          };
          return Toolbar;
      }(Component));
  
      var CalendarComponent = /** @class */ (function (_super) {
          __extends(CalendarComponent, _super);
          function CalendarComponent(el) {
              var _this = _super.call(this) || this;
              _this.elClassNames = [];
              _this.renderSkeleton = memoizeRendering(_this._renderSkeleton, _this._unrenderSkeleton);
              _this.renderToolbars = memoizeRendering(_this._renderToolbars, _this._unrenderToolbars, [_this.renderSkeleton]);
              _this.buildComponentContext = memoize(buildComponentContext);
              _this.buildViewPropTransformers = memoize(buildViewPropTransformers);
              _this.el = el;
              _this.computeTitle = memoize(computeTitle);
              _this.parseBusinessHours = memoize(function (input) {
                  return parseBusinessHours(input, _this.context.calendar);
              });
              return _this;
          }
          CalendarComponent.prototype.render = function (props, context) {
              this.freezeHeight();
              var title = this.computeTitle(props.dateProfile, props.viewSpec.options);
              this.renderSkeleton(context);
              this.renderToolbars(props.viewSpec, props.dateProfile, props.currentDate, title);
              this.renderView(props, title);
              this.updateSize();
              this.thawHeight();
          };
          CalendarComponent.prototype.destroy = function () {
              if (this.header) {
                  this.header.destroy();
              }
              if (this.footer) {
                  this.footer.destroy();
              }
              this.renderSkeleton.unrender(); // will call destroyView
              _super.prototype.destroy.call(this);
          };
          CalendarComponent.prototype._renderSkeleton = function (context) {
              this.updateElClassNames(context);
              prependToElement(this.el, this.contentEl = createElement('div', { className: 'fc-view-container' }));
              var calendar = context.calendar;
              for (var _i = 0, _a = calendar.pluginSystem.hooks.viewContainerModifiers; _i < _a.length; _i++) {
                  var modifyViewContainer = _a[_i];
                  modifyViewContainer(this.contentEl, calendar);
              }
          };
          CalendarComponent.prototype._unrenderSkeleton = function () {
              // weird to have this here
              if (this.view) {
                  this.savedScroll = this.view.queryScroll();
                  this.view.destroy();
                  this.view = null;
              }
              removeElement(this.contentEl);
              this.removeElClassNames();
          };
          CalendarComponent.prototype.removeElClassNames = function () {
              var classList = this.el.classList;
              for (var _i = 0, _a = this.elClassNames; _i < _a.length; _i++) {
                  var className = _a[_i];
                  classList.remove(className);
              }
              this.elClassNames = [];
          };
          CalendarComponent.prototype.updateElClassNames = function (context) {
              this.removeElClassNames();
              var theme = context.theme, options = context.options;
              this.elClassNames = [
                  'fc',
                  'fc-' + options.dir,
                  theme.getClass('widget')
              ];
              var classList = this.el.classList;
              for (var _i = 0, _a = this.elClassNames; _i < _a.length; _i++) {
                  var className = _a[_i];
                  classList.add(className);
              }
          };
          CalendarComponent.prototype._renderToolbars = function (viewSpec, dateProfile, currentDate, title) {
              var _a = this, context = _a.context, header = _a.header, footer = _a.footer;
              var options = context.options, calendar = context.calendar;
              var headerLayout = options.header;
              var footerLayout = options.footer;
              var dateProfileGenerator = this.props.dateProfileGenerator;
              var now = calendar.getNow();
              var todayInfo = dateProfileGenerator.build(now);
              var prevInfo = dateProfileGenerator.buildPrev(dateProfile, currentDate);
              var nextInfo = dateProfileGenerator.buildNext(dateProfile, currentDate);
              var toolbarProps = {
                  title: title,
                  activeButton: viewSpec.type,
                  isTodayEnabled: todayInfo.isValid && !rangeContainsMarker(dateProfile.currentRange, now),
                  isPrevEnabled: prevInfo.isValid,
                  isNextEnabled: nextInfo.isValid
              };
              if (headerLayout) {
                  if (!header) {
                      header = this.header = new Toolbar('fc-header-toolbar');
                      prependToElement(this.el, header.el);
                  }
                  header.receiveProps(__assign({ layout: headerLayout }, toolbarProps), context);
              }
              else if (header) {
                  header.destroy();
                  header = this.header = null;
              }
              if (footerLayout) {
                  if (!footer) {
                      footer = this.footer = new Toolbar('fc-footer-toolbar');
                      appendToElement(this.el, footer.el);
                  }
                  footer.receiveProps(__assign({ layout: footerLayout }, toolbarProps), context);
              }
              else if (footer) {
                  footer.destroy();
                  footer = this.footer = null;
              }
          };
          CalendarComponent.prototype._unrenderToolbars = function () {
              if (this.header) {
                  this.header.destroy();
                  this.header = null;
              }
              if (this.footer) {
                  this.footer.destroy();
                  this.footer = null;
              }
          };
          CalendarComponent.prototype.renderView = function (props, title) {
              var view = this.view;
              var _a = this.context, calendar = _a.calendar, options = _a.options;
              var viewSpec = props.viewSpec, dateProfileGenerator = props.dateProfileGenerator;
              if (!view || view.viewSpec !== viewSpec) {
                  if (view) {
                      view.destroy();
                  }
                  view = this.view = new viewSpec['class'](viewSpec, this.contentEl);
                  if (this.savedScroll) {
                      view.addScroll(this.savedScroll, true);
                      this.savedScroll = null;
                  }
              }
              view.title = title; // for the API
              var viewProps = {
                  dateProfileGenerator: dateProfileGenerator,
                  dateProfile: props.dateProfile,
                  businessHours: this.parseBusinessHours(viewSpec.options.businessHours),
                  eventStore: props.eventStore,
                  eventUiBases: props.eventUiBases,
                  dateSelection: props.dateSelection,
                  eventSelection: props.eventSelection,
                  eventDrag: props.eventDrag,
                  eventResize: props.eventResize
              };
              var transformers = this.buildViewPropTransformers(calendar.pluginSystem.hooks.viewPropsTransformers);
              for (var _i = 0, transformers_1 = transformers; _i < transformers_1.length; _i++) {
                  var transformer = transformers_1[_i];
                  __assign(viewProps, transformer.transform(viewProps, viewSpec, props, options));
              }
              view.receiveProps(viewProps, this.buildComponentContext(this.context, viewSpec, view));
          };
          // Sizing
          // -----------------------------------------------------------------------------------------------------------------
          CalendarComponent.prototype.updateSize = function (isResize) {
              if (isResize === void 0) { isResize = false; }
              var view = this.view;
              if (!view) {
                  return; // why?
              }
              if (isResize || this.isHeightAuto == null) {
                  this.computeHeightVars();
              }
              view.updateSize(isResize, this.viewHeight, this.isHeightAuto);
              view.updateNowIndicator(); // we need to guarantee this will run after updateSize
              view.popScroll(isResize);
          };
          CalendarComponent.prototype.computeHeightVars = function () {
              var calendar = this.context.calendar; // yuck. need to handle dynamic options
              var heightInput = calendar.opt('height');
              var contentHeightInput = calendar.opt('contentHeight');
              this.isHeightAuto = heightInput === 'auto' || contentHeightInput === 'auto';
              if (typeof contentHeightInput === 'number') { // exists and not 'auto'
                  this.viewHeight = contentHeightInput;
              }
              else if (typeof contentHeightInput === 'function') { // exists and is a function
                  this.viewHeight = contentHeightInput();
              }
              else if (typeof heightInput === 'number') { // exists and not 'auto'
                  this.viewHeight = heightInput - this.queryToolbarsHeight();
              }
              else if (typeof heightInput === 'function') { // exists and is a function
                  this.viewHeight = heightInput() - this.queryToolbarsHeight();
              }
              else if (heightInput === 'parent') { // set to height of parent element
                  var parentEl = this.el.parentNode;
                  this.viewHeight = parentEl.getBoundingClientRect().height - this.queryToolbarsHeight();
              }
              else {
                  this.viewHeight = Math.round(this.contentEl.getBoundingClientRect().width /
                      Math.max(calendar.opt('aspectRatio'), .5));
              }
          };
          CalendarComponent.prototype.queryToolbarsHeight = function () {
              var height = 0;
              if (this.header) {
                  height += computeHeightAndMargins(this.header.el);
              }
              if (this.footer) {
                  height += computeHeightAndMargins(this.footer.el);
              }
              return height;
          };
          // Height "Freezing"
          // -----------------------------------------------------------------------------------------------------------------
          CalendarComponent.prototype.freezeHeight = function () {
              applyStyle(this.el, {
                  height: this.el.getBoundingClientRect().height,
                  overflow: 'hidden'
              });
          };
          CalendarComponent.prototype.thawHeight = function () {
              applyStyle(this.el, {
                  height: '',
                  overflow: ''
              });
          };
          return CalendarComponent;
      }(Component));
      // Title and Date Formatting
      // -----------------------------------------------------------------------------------------------------------------
      // Computes what the title at the top of the calendar should be for this view
      function computeTitle(dateProfile, viewOptions) {
          var 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 this.context.dateEnv.formatRange(range.start, range.end, createFormatter(viewOptions.titleFormat || computeTitleFormat(dateProfile), viewOptions.titleRangeSeparator), { isEndExclusive: dateProfile.isRangeAllDay });
      }
      // 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 computeTitleFormat(dateProfile) {
          var currentRangeUnit = dateProfile.currentRangeUnit;
          if (currentRangeUnit === 'year') {
              return { year: 'numeric' };
          }
          else if (currentRangeUnit === 'month') {
              return { year: 'numeric', month: 'long' }; // like "September 2014"
          }
          else {
              var 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' };
              }
              else {
                  // one day. longer, like "September 9 2014"
                  return { year: 'numeric', month: 'long', day: 'numeric' };
              }
          }
      }
      // build a context scoped to the view
      function buildComponentContext(context, viewSpec, view) {
          return context.extend(viewSpec.options, view);
      }
      // Plugin
      // -----------------------------------------------------------------------------------------------------------------
      function buildViewPropTransformers(theClasses) {
          return theClasses.map(function (theClass) {
              return new theClass();
          });
      }
  
      var Interaction = /** @class */ (function () {
          function Interaction(settings) {
              this.component = settings.component;
          }
          Interaction.prototype.destroy = function () {
          };
          return Interaction;
      }());
      function parseInteractionSettings(component, input) {
          return {
              component: component,
              el: input.el,
              useEventCenter: input.useEventCenter != null ? input.useEventCenter : true
          };
      }
      function interactionSettingsToStore(settings) {
          var _a;
          return _a = {},
              _a[settings.component.uid] = settings,
              _a;
      }
      // global state
      var interactionSettingsStore = {};
  
      /*
      Detects when the user clicks on an event within a DateComponent
      */
      var EventClicking = /** @class */ (function (_super) {
          __extends(EventClicking, _super);
          function EventClicking(settings) {
              var _this = _super.call(this, settings) || this;
              _this.handleSegClick = function (ev, segEl) {
                  var component = _this.component;
                  var _a = component.context, calendar = _a.calendar, view = _a.view;
                  var 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
                      var hasUrlContainer = elementClosest(ev.target, '.fc-has-url');
                      var url = hasUrlContainer ? hasUrlContainer.querySelector('a[href]').href : '';
                      calendar.publiclyTrigger('eventClick', [
                          {
                              el: segEl,
                              event: new EventApi(component.context.calendar, seg.eventRange.def, seg.eventRange.instance),
                              jsEvent: ev,
                              view: view
                          }
                      ]);
                      if (url && !ev.defaultPrevented) {
                          window.location.href = url;
                      }
                  }
              };
              var component = settings.component;
              _this.destroy = listenBySelector(component.el, 'click', component.fgSegSelector + ',' + component.bgSegSelector, _this.handleSegClick);
              return _this;
          }
          return EventClicking;
      }(Interaction));
  
      /*
      Triggers events and adds/removes core classNames when the user's pointer
      enters/leaves event-elements of a component.
      */
      var EventHovering = /** @class */ (function (_super) {
          __extends(EventHovering, _super);
          function EventHovering(settings) {
              var _this = _super.call(this, settings) || this;
              // for simulating an eventMouseLeave when the event el is destroyed while mouse is over it
              _this.handleEventElRemove = function (el) {
                  if (el === _this.currentSegEl) {
                      _this.handleSegLeave(null, _this.currentSegEl);
                  }
              };
              _this.handleSegEnter = function (ev, segEl) {
                  if (getElSeg(segEl)) { // TODO: better way to make sure not hovering over more+ link or its wrapper
                      segEl.classList.add('fc-allow-mouse-resize');
                      _this.currentSegEl = segEl;
                      _this.triggerEvent('eventMouseEnter', ev, segEl);
                  }
              };
              _this.handleSegLeave = function (ev, segEl) {
                  if (_this.currentSegEl) {
                      segEl.classList.remove('fc-allow-mouse-resize');
                      _this.currentSegEl = null;
                      _this.triggerEvent('eventMouseLeave', ev, segEl);
                  }
              };
              var component = settings.component;
              _this.removeHoverListeners = listenToHoverBySelector(component.el, component.fgSegSelector + ',' + component.bgSegSelector, _this.handleSegEnter, _this.handleSegLeave);
              // how to make sure component already has context?
              component.context.calendar.on('eventElRemove', _this.handleEventElRemove);
              return _this;
          }
          EventHovering.prototype.destroy = function () {
              this.removeHoverListeners();
              this.component.context.calendar.off('eventElRemove', this.handleEventElRemove);
          };
          EventHovering.prototype.triggerEvent = function (publicEvName, ev, segEl) {
              var component = this.component;
              var _a = component.context, calendar = _a.calendar, view = _a.view;
              var seg = getElSeg(segEl);
              if (!ev || component.isValidSegDownEl(ev.target)) {
                  calendar.publiclyTrigger(publicEvName, [
                      {
                          el: segEl,
                          event: new EventApi(calendar, seg.eventRange.def, seg.eventRange.instance),
                          jsEvent: ev,
                          view: view
                      }
                  ]);
              }
          };
          return EventHovering;
      }(Interaction));
  
      var StandardTheme = /** @class */ (function (_super) {
          __extends(StandardTheme, _super);
          function StandardTheme() {
              return _super !== null && _super.apply(this, arguments) || this;
          }
          return StandardTheme;
      }(Theme));
      StandardTheme.prototype.classes = {
          widget: 'fc-unthemed',
          widgetHeader: 'fc-widget-header',
          widgetContent: 'fc-widget-content',
          buttonGroup: 'fc-button-group',
          button: 'fc-button fc-button-primary',
          buttonActive: 'fc-button-active',
          popoverHeader: 'fc-widget-header',
          popoverContent: 'fc-widget-content',
          // day grid
          headerRow: 'fc-widget-header',
          dayRow: 'fc-widget-content',
          // list view
          listView: 'fc-widget-content'
      };
      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.iconOverrideOption = 'buttonIcons';
      StandardTheme.prototype.iconOverrideCustomButtonOption = 'icon';
      StandardTheme.prototype.iconOverridePrefix = 'fc-icon-';
  
      var Calendar = /** @class */ (function () {
          function Calendar(el, overrides) {
              var _this = this;
              this.buildComponentContext = memoize(buildComponentContext$1);
              this.parseRawLocales = memoize(parseRawLocales);
              this.buildLocale = memoize(buildLocale);
              this.buildDateEnv = memoize(buildDateEnv);
              this.buildTheme = memoize(buildTheme);
              this.buildEventUiSingleBase = memoize(this._buildEventUiSingleBase);
              this.buildSelectionConfig = memoize(this._buildSelectionConfig);
              this.buildEventUiBySource = memoizeOutput(buildEventUiBySource, isPropsEqual);
              this.buildEventUiBases = memoize(buildEventUiBases);
              this.interactionsStore = {};
              this.actionQueue = [];
              this.isReducing = false;
              // isDisplaying: boolean = false // installed in DOM? accepting renders?
              this.needsRerender = false; // needs a render?
              this.isRendering = false; // currently in the executeRender function?
              this.renderingPauseDepth = 0;
              this.buildDelayedRerender = memoize(buildDelayedRerender);
              this.afterSizingTriggers = {};
              this.isViewUpdated = false;
              this.isDatesUpdated = false;
              this.isEventsUpdated = false;
              this.el = el;
              this.optionsManager = new OptionsManager(overrides || {});
              this.pluginSystem = new PluginSystem();
              // only do once. don't do in handleOptions. because can't remove plugins
              this.addPluginInputs(this.optionsManager.computed.plugins || []);
              this.handleOptions(this.optionsManager.computed);
              this.publiclyTrigger('_init'); // for tests
              this.hydrate();
              this.calendarInteractions = this.pluginSystem.hooks.calendarInteractions
                  .map(function (calendarInteractionClass) {
                  return new calendarInteractionClass(_this);
              });
          }
          Calendar.prototype.addPluginInputs = function (pluginInputs) {
              var pluginDefs = refinePluginDefs(pluginInputs);
              for (var _i = 0, pluginDefs_1 = pluginDefs; _i < pluginDefs_1.length; _i++) {
                  var pluginDef = pluginDefs_1[_i];
                  this.pluginSystem.add(pluginDef);
              }
          };
          Object.defineProperty(Calendar.prototype, "view", {
              // public API
              get: function () {
                  return this.component ? this.component.view : null;
              },
              enumerable: true,
              configurable: true
          });
          // Public API for rendering
          // -----------------------------------------------------------------------------------------------------------------
          Calendar.prototype.render = function () {
              if (!this.component) {
                  this.component = new CalendarComponent(this.el);
                  this.renderableEventStore = createEmptyEventStore();
                  this.bindHandlers();
                  this.executeRender();
              }
              else {
                  this.requestRerender();
              }
          };
          Calendar.prototype.destroy = function () {
              if (this.component) {
                  this.unbindHandlers();
                  this.component.destroy(); // don't null-out. in case API needs access
                  this.component = null; // umm ???
                  for (var _i = 0, _a = this.calendarInteractions; _i < _a.length; _i++) {
                      var interaction = _a[_i];
                      interaction.destroy();
                  }
                  this.publiclyTrigger('_destroyed');
              }
          };
          // Handlers
          // -----------------------------------------------------------------------------------------------------------------
          Calendar.prototype.bindHandlers = function () {
              var _this = this;
              // event delegation for nav links
              this.removeNavLinkListener = listenBySelector(this.el, 'click', 'a[data-goto]', function (ev, anchorEl) {
                  var gotoOptions = anchorEl.getAttribute('data-goto');
                  gotoOptions = gotoOptions ? JSON.parse(gotoOptions) : {};
                  var dateEnv = _this.dateEnv;
                  var dateMarker = dateEnv.createMarker(gotoOptions.date);
                  var viewType = gotoOptions.type;
                  // property like "navLinkDayClick". might be a string or a function
                  var customAction = _this.viewOpt('navLink' + capitaliseFirstLetter(viewType) + 'Click');
                  if (typeof customAction === 'function') {
                      customAction(dateEnv.toDate(dateMarker), ev);
                  }
                  else {
                      if (typeof customAction === 'string') {
                          viewType = customAction;
                      }
                      _this.zoomTo(dateMarker, viewType);
                  }
              });
              if (this.opt('handleWindowResize')) {
                  window.addEventListener('resize', this.windowResizeProxy = debounce(// prevents rapid calls
                  this.windowResize.bind(this), this.opt('windowResizeDelay')));
              }
          };
          Calendar.prototype.unbindHandlers = function () {
              this.removeNavLinkListener();
              if (this.windowResizeProxy) {
                  window.removeEventListener('resize', this.windowResizeProxy);
                  this.windowResizeProxy = null;
              }
          };
          // Dispatcher
          // -----------------------------------------------------------------------------------------------------------------
          Calendar.prototype.hydrate = function () {
              var _this = this;
              this.state = this.buildInitialState();
              var rawSources = this.opt('eventSources') || [];
              var singleRawSource = this.opt('events');
              var sources = []; // parsed
              if (singleRawSource) {
                  rawSources.unshift(singleRawSource);
              }
              for (var _i = 0, rawSources_1 = rawSources; _i < rawSources_1.length; _i++) {
                  var rawSource = rawSources_1[_i];
                  var source = parseEventSource(rawSource, this);
                  if (source) {
                      sources.push(source);
                  }
              }
              this.batchRendering(function () {
                  _this.dispatch({ type: 'INIT' }); // pass in sources here?
                  _this.dispatch({ type: 'ADD_EVENT_SOURCES', sources: sources });
                  _this.dispatch({
                      type: 'SET_VIEW_TYPE',
                      viewType: _this.opt('defaultView') || _this.pluginSystem.hooks.defaultView
                  });
              });
          };
          Calendar.prototype.buildInitialState = function () {
              return {
                  viewType: null,
                  loadingLevel: 0,
                  eventSourceLoadingLevel: 0,
                  currentDate: this.getInitialDate(),
                  dateProfile: null,
                  eventSources: {},
                  eventStore: createEmptyEventStore(),
                  dateSelection: null,
                  eventSelection: '',
                  eventDrag: null,
                  eventResize: null
              };
          };
          Calendar.prototype.dispatch = function (action) {
              this.actionQueue.push(action);
              if (!this.isReducing) {
                  this.isReducing = true;
                  var oldState = this.state;
                  while (this.actionQueue.length) {
                      this.state = this.reduce(this.state, this.actionQueue.shift(), this);
                  }
                  var newState = this.state;
                  this.isReducing = false;
                  if (!oldState.loadingLevel && newState.loadingLevel) {
                      this.publiclyTrigger('loading', [true]);
                  }
                  else if (oldState.loadingLevel && !newState.loadingLevel) {
                      this.publiclyTrigger('loading', [false]);
                  }
                  var view = this.component && this.component.view;
                  if (oldState.eventStore !== newState.eventStore) {
                      if (oldState.eventStore) {
                          this.isEventsUpdated = true;
                      }
                  }
                  if (oldState.dateProfile !== newState.dateProfile) {
                      if (oldState.dateProfile && view) { // why would view be null!?
                          this.publiclyTrigger('datesDestroy', [
                              {
                                  view: view,
                                  el: view.el
                              }
                          ]);
                      }
                      this.isDatesUpdated = true;
                  }
                  if (oldState.viewType !== newState.viewType) {
                      if (oldState.viewType && view) { // why would view be null!?
                          this.publiclyTrigger('viewSkeletonDestroy', [
                              {
                                  view: view,
                                  el: view.el
                              }
                          ]);
                      }
                      this.isViewUpdated = true;
                  }
                  this.requestRerender();
              }
          };
          Calendar.prototype.reduce = function (state, action, calendar) {
              return reduce(state, action, calendar);
          };
          // Render Queue
          // -----------------------------------------------------------------------------------------------------------------
          Calendar.prototype.requestRerender = function () {
              this.needsRerender = true;
              this.delayedRerender(); // will call a debounced-version of tryRerender
          };
          Calendar.prototype.tryRerender = function () {
              if (this.component && // must be accepting renders
                  this.needsRerender && // indicates that a rerender was requested
                  !this.renderingPauseDepth && // not paused
                  !this.isRendering // not currently in the render loop
              ) {
                  this.executeRender();
              }
          };
          Calendar.prototype.batchRendering = function (func) {
              this.renderingPauseDepth++;
              func();
              this.renderingPauseDepth--;
              if (this.needsRerender) {
                  this.requestRerender();
              }
          };
          // Rendering
          // -----------------------------------------------------------------------------------------------------------------
          Calendar.prototype.executeRender = function () {
              // clear these BEFORE the render so that new values will accumulate during render
              this.needsRerender = false;
              this.isRendering = true;
              this.renderComponent();
              this.isRendering = false;
              // received a rerender request while rendering
              if (this.needsRerender) {
                  this.delayedRerender();
              }
          };
          /*
          don't call this directly. use executeRender instead
          */
          Calendar.prototype.renderComponent = function () {
              var _a = this, state = _a.state, component = _a.component;
              var viewType = state.viewType;
              var viewSpec = this.viewSpecs[viewType];
              if (!viewSpec) {
                  throw new Error("View type \"" + viewType + "\" is not valid");
              }
              // if event sources are still loading and progressive rendering hasn't been enabled,
              // keep rendering the last fully loaded set of events
              var renderableEventStore = this.renderableEventStore =
                  (state.eventSourceLoadingLevel && !this.opt('progressiveEventRendering')) ?
                      this.renderableEventStore :
                      state.eventStore;
              var eventUiSingleBase = this.buildEventUiSingleBase(viewSpec.options);
              var eventUiBySource = this.buildEventUiBySource(state.eventSources);
              var eventUiBases = this.eventUiBases = this.buildEventUiBases(renderableEventStore.defs, eventUiSingleBase, eventUiBySource);
              component.receiveProps(__assign({}, state, { viewSpec: viewSpec, dateProfileGenerator: this.dateProfileGenerators[viewType], dateProfile: state.dateProfile, eventStore: renderableEventStore, eventUiBases: eventUiBases, dateSelection: state.dateSelection, eventSelection: state.eventSelection, eventDrag: state.eventDrag, eventResize: state.eventResize }), this.buildComponentContext(this.theme, this.dateEnv, this.optionsManager.computed));
              if (this.isViewUpdated) {
                  this.isViewUpdated = false;
                  this.publiclyTrigger('viewSkeletonRender', [
                      {
                          view: component.view,
                          el: component.view.el
                      }
                  ]);
              }
              if (this.isDatesUpdated) {
                  this.isDatesUpdated = false;
                  this.publiclyTrigger('datesRender', [
                      {
                          view: component.view,
                          el: component.view.el
                      }
                  ]);
              }
              if (this.isEventsUpdated) {
                  this.isEventsUpdated = false;
              }
              this.releaseAfterSizingTriggers();
          };
          // Options
          // -----------------------------------------------------------------------------------------------------------------
          Calendar.prototype.setOption = function (name, val) {
              var _a;
              this.mutateOptions((_a = {}, _a[name] = val, _a), [], true);
          };
          Calendar.prototype.getOption = function (name) {
              return this.optionsManager.computed[name];
          };
          Calendar.prototype.opt = function (name) {
              return this.optionsManager.computed[name];
          };
          Calendar.prototype.viewOpt = function (name) {
              return this.viewOpts()[name];
          };
          Calendar.prototype.viewOpts = function () {
              return this.viewSpecs[this.state.viewType].options;
          };
          /*
          handles option changes (like a diff)
          */
          Calendar.prototype.mutateOptions = function (updates, removals, isDynamic, deepEqual) {
              var _this = this;
              var changeHandlers = this.pluginSystem.hooks.optionChangeHandlers;
              var normalUpdates = {};
              var specialUpdates = {};
              var oldDateEnv = this.dateEnv; // do this before handleOptions
              var isTimeZoneDirty = false;
              var isSizeDirty = false;
              var anyDifficultOptions = Boolean(removals.length);
              for (var name_1 in updates) {
                  if (changeHandlers[name_1]) {
                      specialUpdates[name_1] = updates[name_1];
                  }
                  else {
                      normalUpdates[name_1] = updates[name_1];
                  }
              }
              for (var name_2 in normalUpdates) {
                  if (/^(height|contentHeight|aspectRatio)$/.test(name_2)) {
                      isSizeDirty = true;
                  }
                  else if (/^(defaultDate|defaultView)$/.test(name_2)) ;
                  else {
                      anyDifficultOptions = true;
                      if (name_2 === 'timeZone') {
                          isTimeZoneDirty = true;
                      }
                  }
              }
              this.optionsManager.mutate(normalUpdates, removals, isDynamic);
              if (anyDifficultOptions) {
                  this.handleOptions(this.optionsManager.computed);
              }
              this.batchRendering(function () {
                  if (anyDifficultOptions) {
                      if (isTimeZoneDirty) {
                          _this.dispatch({
                              type: 'CHANGE_TIMEZONE',
                              oldDateEnv: oldDateEnv
                          });
                      }
                      /* HACK
                      has the same effect as calling this.requestRerender()
                      but recomputes the state's dateProfile
                      */
                      _this.dispatch({
                          type: 'SET_VIEW_TYPE',
                          viewType: _this.state.viewType
                      });
                  }
                  else if (isSizeDirty) {
                      _this.updateSize();
                  }
                  // special updates
                  if (deepEqual) {
                      for (var name_3 in specialUpdates) {
                          changeHandlers[name_3](specialUpdates[name_3], _this, deepEqual);
                      }
                  }
              });
          };
          /*
          rebuilds things based off of a complete set of refined options
          */
          Calendar.prototype.handleOptions = function (options) {
              var _this = this;
              var pluginHooks = this.pluginSystem.hooks;
              this.defaultAllDayEventDuration = createDuration(options.defaultAllDayEventDuration);
              this.defaultTimedEventDuration = createDuration(options.defaultTimedEventDuration);
              this.delayedRerender = this.buildDelayedRerender(options.rerenderDelay);
              this.theme = this.buildTheme(options);
              var available = this.parseRawLocales(options.locales);
              this.availableRawLocales = available.map;
              var locale = this.buildLocale(options.locale || available.defaultCode, available.map);
              this.dateEnv = this.buildDateEnv(locale, options.timeZone, pluginHooks.namedTimeZonedImpl, options.firstDay, options.weekNumberCalculation, options.weekLabel, pluginHooks.cmdFormatter);
              this.selectionConfig = this.buildSelectionConfig(options); // needs dateEnv. do after :(
              // ineffecient to do every time?
              this.viewSpecs = buildViewSpecs(pluginHooks.views, this.optionsManager);
              // ineffecient to do every time?
              this.dateProfileGenerators = mapHash(this.viewSpecs, function (viewSpec) {
                  return new viewSpec.class.prototype.dateProfileGeneratorClass(viewSpec, _this);
              });
          };
          Calendar.prototype.getAvailableLocaleCodes = function () {
              return Object.keys(this.availableRawLocales);
          };
          Calendar.prototype._buildSelectionConfig = function (rawOpts) {
              return processScopedUiProps('select', rawOpts, this);
          };
          Calendar.prototype._buildEventUiSingleBase = function (rawOpts) {
              if (rawOpts.editable) { // so 'editable' affected events
                  rawOpts = __assign({}, rawOpts, { eventEditable: true });
              }
              return processScopedUiProps('event', rawOpts, this);
          };
          // Trigger
          // -----------------------------------------------------------------------------------------------------------------
          Calendar.prototype.hasPublicHandlers = function (name) {
              return this.hasHandlers(name) ||
                  this.opt(name); // handler specified in options
          };
          Calendar.prototype.publiclyTrigger = function (name, args) {
              var optHandler = this.opt(name);
              this.triggerWith(name, this, args);
              if (optHandler) {
                  return optHandler.apply(this, args);
              }
          };
          Calendar.prototype.publiclyTriggerAfterSizing = function (name, args) {
              var afterSizingTriggers = this.afterSizingTriggers;
              (afterSizingTriggers[name] || (afterSizingTriggers[name] = [])).push(args);
          };
          Calendar.prototype.releaseAfterSizingTriggers = function () {
              var afterSizingTriggers = this.afterSizingTriggers;
              for (var name_4 in afterSizingTriggers) {
                  for (var _i = 0, _a = afterSizingTriggers[name_4]; _i < _a.length; _i++) {
                      var args = _a[_i];
                      this.publiclyTrigger(name_4, args);
                  }
              }
              this.afterSizingTriggers = {};
          };
          // View
          // -----------------------------------------------------------------------------------------------------------------
          // Returns a boolean about whether the view is okay to instantiate at some point
          Calendar.prototype.isValidViewType = function (viewType) {
              return Boolean(this.viewSpecs[viewType]);
          };
          Calendar.prototype.changeView = function (viewType, dateOrRange) {
              var dateMarker = null;
              if (dateOrRange) {
                  if (dateOrRange.start && dateOrRange.end) { // a range
                      this.optionsManager.mutate({ visibleRange: dateOrRange }, []); // will not rerender
                      this.handleOptions(this.optionsManager.computed); // ...but yuck
                  }
                  else { // a date
                      dateMarker = this.dateEnv.createMarker(dateOrRange); // just like gotoDate
                  }
              }
              this.unselect();
              this.dispatch({
                  type: 'SET_VIEW_TYPE',
                  viewType: viewType,
                  dateMarker: dateMarker
              });
          };
          // 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
          Calendar.prototype.zoomTo = function (dateMarker, viewType) {
              var spec;
              viewType = viewType || 'day'; // day is default zoom
              spec = this.viewSpecs[viewType] ||
                  this.getUnitViewSpec(viewType);
              this.unselect();
              if (spec) {
                  this.dispatch({
                      type: 'SET_VIEW_TYPE',
                      viewType: spec.type,
                      dateMarker: dateMarker
                  });
              }
              else {
                  this.dispatch({
                      type: 'SET_DATE',
                      dateMarker: dateMarker
                  });
              }
          };
          // Given a duration singular unit, like "week" or "day", finds a matching view spec.
          // Preference is given to views that have corresponding buttons.
          Calendar.prototype.getUnitViewSpec = function (unit) {
              var component = this.component;
              var viewTypes = [];
              var i;
              var spec;
              // put views that have buttons first. there will be duplicates, but oh
              if (component.header) {
                  viewTypes.push.apply(viewTypes, component.header.viewsWithButtons);
              }
              if (component.footer) {
                  viewTypes.push.apply(viewTypes, component.footer.viewsWithButtons);
              }
              for (var viewType in this.viewSpecs) {
                  viewTypes.push(viewType);
              }
              for (i = 0; i < viewTypes.length; i++) {
                  spec = this.viewSpecs[viewTypes[i]];
                  if (spec) {
                      if (spec.singleUnit === unit) {
                          return spec;
                      }
                  }
              }
          };
          // Current Date
          // -----------------------------------------------------------------------------------------------------------------
          Calendar.prototype.getInitialDate = function () {
              var defaultDateInput = this.opt('defaultDate');
              // compute the initial ambig-timezone date
              if (defaultDateInput != null) {
                  return this.dateEnv.createMarker(defaultDateInput);
              }
              else {
                  return this.getNow(); // getNow already returns unzoned
              }
          };
          Calendar.prototype.prev = function () {
              this.unselect();
              this.dispatch({ type: 'PREV' });
          };
          Calendar.prototype.next = function () {
              this.unselect();
              this.dispatch({ type: 'NEXT' });
          };
          Calendar.prototype.prevYear = function () {
              this.unselect();
              this.dispatch({
                  type: 'SET_DATE',
                  dateMarker: this.dateEnv.addYears(this.state.currentDate, -1)
              });
          };
          Calendar.prototype.nextYear = function () {
              this.unselect();
              this.dispatch({
                  type: 'SET_DATE',
                  dateMarker: this.dateEnv.addYears(this.state.currentDate, 1)
              });
          };
          Calendar.prototype.today = function () {
              this.unselect();
              this.dispatch({
                  type: 'SET_DATE',
                  dateMarker: this.getNow()
              });
          };
          Calendar.prototype.gotoDate = function (zonedDateInput) {
              this.unselect();
              this.dispatch({
                  type: 'SET_DATE',
                  dateMarker: this.dateEnv.createMarker(zonedDateInput)
              });
          };
          Calendar.prototype.incrementDate = function (deltaInput) {
              var delta = createDuration(deltaInput);
              if (delta) { // else, warn about invalid input?
                  this.unselect();
                  this.dispatch({
                      type: 'SET_DATE',
                      dateMarker: this.dateEnv.add(this.state.currentDate, delta)
                  });
              }
          };
          // for external API
          Calendar.prototype.getDate = function () {
              return this.dateEnv.toDate(this.state.currentDate);
          };
          // Date Formatting Utils
          // -----------------------------------------------------------------------------------------------------------------
          Calendar.prototype.formatDate = function (d, formatter) {
              var dateEnv = this.dateEnv;
              return dateEnv.format(dateEnv.createMarker(d), createFormatter(formatter));
          };
          // `settings` is for formatter AND isEndExclusive
          Calendar.prototype.formatRange = function (d0, d1, settings) {
              var dateEnv = this.dateEnv;
              return dateEnv.formatRange(dateEnv.createMarker(d0), dateEnv.createMarker(d1), createFormatter(settings, this.opt('defaultRangeSeparator')), settings);
          };
          Calendar.prototype.formatIso = function (d, omitTime) {
              var dateEnv = this.dateEnv;
              return dateEnv.formatIso(dateEnv.createMarker(d), { omitTime: omitTime });
          };
          // Sizing
          // -----------------------------------------------------------------------------------------------------------------
          Calendar.prototype.windowResize = function (ev) {
              if (!this.isHandlingWindowResize &&
                  this.component && // why?
                  ev.target === window // not a jqui resize event
              ) {
                  this.isHandlingWindowResize = true;
                  this.updateSize();
                  this.publiclyTrigger('windowResize', [this.view]);
                  this.isHandlingWindowResize = false;
              }
          };
          Calendar.prototype.updateSize = function () {
              if (this.component) { // when?
                  this.component.updateSize(true);
              }
          };
          // Component Registration
          // -----------------------------------------------------------------------------------------------------------------
          Calendar.prototype.registerInteractiveComponent = function (component, settingsInput) {
              var settings = parseInteractionSettings(component, settingsInput);
              var DEFAULT_INTERACTIONS = [
                  EventClicking,
                  EventHovering
              ];
              var interactionClasses = DEFAULT_INTERACTIONS.concat(this.pluginSystem.hooks.componentInteractions);
              var interactions = interactionClasses.map(function (interactionClass) {
                  return new interactionClass(settings);
              });
              this.interactionsStore[component.uid] = interactions;
              interactionSettingsStore[component.uid] = settings;
          };
          Calendar.prototype.unregisterInteractiveComponent = function (component) {
              for (var _i = 0, _a = this.interactionsStore[component.uid]; _i < _a.length; _i++) {
                  var listener = _a[_i];
                  listener.destroy();
              }
              delete this.interactionsStore[component.uid];
              delete interactionSettingsStore[component.uid];
          };
          // Date Selection / Event Selection / DayClick
          // -----------------------------------------------------------------------------------------------------------------
          // this public method receives start/end dates in any format, with any timezone
          // NOTE: args were changed from v3
          Calendar.prototype.select = function (dateOrObj, endDate) {
              var selectionInput;
              if (endDate == null) {
                  if (dateOrObj.start != null) {
                      selectionInput = dateOrObj;
                  }
                  else {
                      selectionInput = {
                          start: dateOrObj,
                          end: null
                      };
                  }
              }
              else {
                  selectionInput = {
                      start: dateOrObj,
                      end: endDate
                  };
              }
              var selection = parseDateSpan(selectionInput, this.dateEnv, createDuration({ days: 1 }) // TODO: cache this?
              );
              if (selection) { // throw parse error otherwise?
                  this.dispatch({ type: 'SELECT_DATES', selection: selection });
                  this.triggerDateSelect(selection);
              }
          };
          // public method
          Calendar.prototype.unselect = function (pev) {
              if (this.state.dateSelection) {
                  this.dispatch({ type: 'UNSELECT_DATES' });
                  this.triggerDateUnselect(pev);
              }
          };
          Calendar.prototype.triggerDateSelect = function (selection, pev) {
              var arg = __assign({}, this.buildDateSpanApi(selection), { jsEvent: pev ? pev.origEvent : null, view: this.view });
              this.publiclyTrigger('select', [arg]);
          };
          Calendar.prototype.triggerDateUnselect = function (pev) {
              this.publiclyTrigger('unselect', [
                  {
                      jsEvent: pev ? pev.origEvent : null,
                      view: this.view
                  }
              ]);
          };
          // TODO: receive pev?
          Calendar.prototype.triggerDateClick = function (dateSpan, dayEl, view, ev) {
              var arg = __assign({}, this.buildDatePointApi(dateSpan), { dayEl: dayEl, jsEvent: ev, // Is this always a mouse event? See #4655
                  view: view });
              this.publiclyTrigger('dateClick', [arg]);
          };
          Calendar.prototype.buildDatePointApi = function (dateSpan) {
              var props = {};
              for (var _i = 0, _a = this.pluginSystem.hooks.datePointTransforms; _i < _a.length; _i++) {
                  var transform = _a[_i];
                  __assign(props, transform(dateSpan, this));
              }
              __assign(props, buildDatePointApi(dateSpan, this.dateEnv));
              return props;
          };
          Calendar.prototype.buildDateSpanApi = function (dateSpan) {
              var props = {};
              for (var _i = 0, _a = this.pluginSystem.hooks.dateSpanTransforms; _i < _a.length; _i++) {
                  var transform = _a[_i];
                  __assign(props, transform(dateSpan, this));
              }
              __assign(props, buildDateSpanApi(dateSpan, this.dateEnv));
              return props;
          };
          // Date Utils
          // -----------------------------------------------------------------------------------------------------------------
          // Returns a DateMarker for the current date, as defined by the client's computer or from the `now` option
          Calendar.prototype.getNow = function () {
              var now = this.opt('now');
              if (typeof now === 'function') {
                  now = now();
              }
              if (now == null) {
                  return this.dateEnv.createNowMarker();
              }
              return this.dateEnv.createMarker(now);
          };
          // Event-Date Utilities
          // -----------------------------------------------------------------------------------------------------------------
          // Given an event's allDay status and start date, return what its fallback end date should be.
          // TODO: rename to computeDefaultEventEnd
          Calendar.prototype.getDefaultEventEnd = function (allDay, marker) {
              var end = marker;
              if (allDay) {
                  end = startOfDay(end);
                  end = this.dateEnv.add(end, this.defaultAllDayEventDuration);
              }
              else {
                  end = this.dateEnv.add(end, this.defaultTimedEventDuration);
              }
              return end;
          };
          // Public Events API
          // -----------------------------------------------------------------------------------------------------------------
          Calendar.prototype.addEvent = function (eventInput, sourceInput) {
              if (eventInput instanceof EventApi) {
                  var def = eventInput._def;
                  var instance = eventInput._instance;
                  // not already present? don't want to add an old snapshot
                  if (!this.state.eventStore.defs[def.defId]) {
                      this.dispatch({
                          type: 'ADD_EVENTS',
                          eventStore: eventTupleToStore({ def: def, instance: instance }) // TODO: better util for two args?
                      });
                  }
                  return eventInput;
              }
              var sourceId;
              if (sourceInput instanceof EventSourceApi) {
                  sourceId = sourceInput.internalEventSource.sourceId;
              }
              else if (sourceInput != null) {
                  var 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;
                  }
                  else {
                      sourceId = sourceApi.internalEventSource.sourceId;
                  }
              }
              var tuple = parseEvent(eventInput, sourceId, this);
              if (tuple) {
                  this.dispatch({
                      type: 'ADD_EVENTS',
                      eventStore: eventTupleToStore(tuple)
                  });
                  return new EventApi(this, tuple.def, tuple.def.recurringDef ? null : tuple.instance);
              }
              return null;
          };
          // TODO: optimize
          Calendar.prototype.getEventById = function (id) {
              var _a = this.state.eventStore, defs = _a.defs, instances = _a.instances;
              id = String(id);
              for (var defId in defs) {
                  var def = defs[defId];
                  if (def.publicId === id) {
                      if (def.recurringDef) {
                          return new EventApi(this, def, null);
                      }
                      else {
                          for (var instanceId in instances) {
                              var instance = instances[instanceId];
                              if (instance.defId === def.defId) {
                                  return new EventApi(this, def, instance);
                              }
                          }
                      }
                  }
              }
              return null;
          };
          Calendar.prototype.getEvents = function () {
              var _a = this.state.eventStore, defs = _a.defs, instances = _a.instances;
              var eventApis = [];
              for (var id in instances) {
                  var instance = instances[id];
                  var def = defs[instance.defId];
                  eventApis.push(new EventApi(this, def, instance));
              }
              return eventApis;
          };
          Calendar.prototype.removeAllEvents = function () {
              this.dispatch({ type: 'REMOVE_ALL_EVENTS' });
          };
          Calendar.prototype.rerenderEvents = function () {
              this.dispatch({ type: 'RESET_EVENTS' });
          };
          // Public Event Sources API
          // -----------------------------------------------------------------------------------------------------------------
          Calendar.prototype.getEventSources = function () {
              var sourceHash = this.state.eventSources;
              var sourceApis = [];
              for (var internalId in sourceHash) {
                  sourceApis.push(new EventSourceApi(this, sourceHash[internalId]));
              }
              return sourceApis;
          };
          Calendar.prototype.getEventSourceById = function (id) {
              var sourceHash = this.state.eventSources;
              id = String(id);
              for (var sourceId in sourceHash) {
                  if (sourceHash[sourceId].publicId === id) {
                      return new EventSourceApi(this, sourceHash[sourceId]);
                  }
              }
              return null;
          };
          Calendar.prototype.addEventSource = function (sourceInput) {
              if (sourceInput instanceof EventSourceApi) {
                  // not already present? don't want to add an old snapshot
                  if (!this.state.eventSources[sourceInput.internalEventSource.sourceId]) {
                      this.dispatch({
                          type: 'ADD_EVENT_SOURCES',
                          sources: [sourceInput.internalEventSource]
                      });
                  }
                  return sourceInput;
              }
              var eventSource = parseEventSource(sourceInput, this);
              if (eventSource) { // TODO: error otherwise?
                  this.dispatch({ type: 'ADD_EVENT_SOURCES', sources: [eventSource] });
                  return new EventSourceApi(this, eventSource);
              }
              return null;
          };
          Calendar.prototype.removeAllEventSources = function () {
              this.dispatch({ type: 'REMOVE_ALL_EVENT_SOURCES' });
          };
          Calendar.prototype.refetchEvents = function () {
              this.dispatch({ type: 'FETCH_EVENT_SOURCES' });
          };
          // Scroll
          // -----------------------------------------------------------------------------------------------------------------
          Calendar.prototype.scrollToTime = function (timeInput) {
              var duration = createDuration(timeInput);
              if (duration) {
                  this.component.view.scrollToDuration(duration);
              }
          };
          return Calendar;
      }());
      EmitterMixin.mixInto(Calendar);
      // for memoizers
      // -----------------------------------------------------------------------------------------------------------------
      function buildComponentContext$1(theme, dateEnv, options) {
          return new ComponentContext(this, theme, dateEnv, options, null);
      }
      function buildDateEnv(locale, timeZone, namedTimeZoneImpl, firstDay, weekNumberCalculation, weekLabel, cmdFormatter) {
          return new DateEnv({
              calendarSystem: 'gregory',
              timeZone: timeZone,
              namedTimeZoneImpl: namedTimeZoneImpl,
              locale: locale,
              weekNumberCalculation: weekNumberCalculation,
              firstDay: firstDay,
              weekLabel: weekLabel,
              cmdFormatter: cmdFormatter
          });
      }
      function buildTheme(calendarOptions) {
          var themeClass = this.pluginSystem.hooks.themeClasses[calendarOptions.themeSystem] || StandardTheme;
          return new themeClass(calendarOptions);
      }
      function buildDelayedRerender(wait) {
          var func = this.tryRerender.bind(this);
          if (wait != null) {
              func = debounce(func, wait);
          }
          return func;
      }
      function buildEventUiBySource(eventSources) {
          return mapHash(eventSources, function (eventSource) {
              return eventSource.ui;
          });
      }
      function buildEventUiBases(eventDefs, eventUiSingleBase, eventUiBySource) {
          var eventUiBases = { '': eventUiSingleBase };
          for (var defId in eventDefs) {
              var def = eventDefs[defId];
              if (def.sourceId && eventUiBySource[def.sourceId]) {
                  eventUiBases[defId] = eventUiBySource[def.sourceId];
              }
          }
          return eventUiBases;
      }
  
      var View = /** @class */ (function (_super) {
          __extends(View, _super);
          function View(viewSpec, parentEl) {
              var _this = _super.call(this, createElement('div', { className: 'fc-view fc-' + viewSpec.type + '-view' })) || this;
              _this.renderDatesMem = memoizeRendering(_this.renderDatesWrap, _this.unrenderDatesWrap);
              _this.renderBusinessHoursMem = memoizeRendering(_this.renderBusinessHours, _this.unrenderBusinessHours, [_this.renderDatesMem]);
              _this.renderDateSelectionMem = memoizeRendering(_this.renderDateSelectionWrap, _this.unrenderDateSelectionWrap, [_this.renderDatesMem]);
              _this.renderEventsMem = memoizeRendering(_this.renderEvents, _this.unrenderEvents, [_this.renderDatesMem]);
              _this.renderEventSelectionMem = memoizeRendering(_this.renderEventSelectionWrap, _this.unrenderEventSelectionWrap, [_this.renderEventsMem]);
              _this.renderEventDragMem = memoizeRendering(_this.renderEventDragWrap, _this.unrenderEventDragWrap, [_this.renderDatesMem]);
              _this.renderEventResizeMem = memoizeRendering(_this.renderEventResizeWrap, _this.unrenderEventResizeWrap, [_this.renderDatesMem]);
              _this.viewSpec = viewSpec;
              _this.type = viewSpec.type;
              parentEl.appendChild(_this.el);
              _this.initialize();
              return _this;
          }
          View.prototype.initialize = function () {
          };
          Object.defineProperty(View.prototype, "activeStart", {
              // Date Setting/Unsetting
              // -----------------------------------------------------------------------------------------------------------------
              get: function () {
                  return this.context.dateEnv.toDate(this.props.dateProfile.activeRange.start);
              },
              enumerable: true,
              configurable: true
          });
          Object.defineProperty(View.prototype, "activeEnd", {
              get: function () {
                  return this.context.dateEnv.toDate(this.props.dateProfile.activeRange.end);
              },
              enumerable: true,
              configurable: true
          });
          Object.defineProperty(View.prototype, "currentStart", {
              get: function () {
                  return this.context.dateEnv.toDate(this.props.dateProfile.currentRange.start);
              },
              enumerable: true,
              configurable: true
          });
          Object.defineProperty(View.prototype, "currentEnd", {
              get: function () {
                  return this.context.dateEnv.toDate(this.props.dateProfile.currentRange.end);
              },
              enumerable: true,
              configurable: true
          });
          // General Rendering
          // -----------------------------------------------------------------------------------------------------------------
          View.prototype.render = function (props, context) {
              this.renderDatesMem(props.dateProfile);
              this.renderBusinessHoursMem(props.businessHours);
              this.renderDateSelectionMem(props.dateSelection);
              this.renderEventsMem(props.eventStore);
              this.renderEventSelectionMem(props.eventSelection);
              this.renderEventDragMem(props.eventDrag);
              this.renderEventResizeMem(props.eventResize);
          };
          View.prototype.beforeUpdate = function () {
              this.addScroll(this.queryScroll());
          };
          View.prototype.destroy = function () {
              _super.prototype.destroy.call(this);
              this.renderDatesMem.unrender(); // should unrender everything else
          };
          // Sizing
          // -----------------------------------------------------------------------------------------------------------------
          View.prototype.updateSize = function (isResize, viewHeight, isAuto) {
              var calendar = this.context.calendar;
              if (isResize) {
                  this.addScroll(this.queryScroll()); // NOTE: same code as in beforeUpdate
              }
              if (isResize || // HACKS...
                  calendar.isViewUpdated ||
                  calendar.isDatesUpdated ||
                  calendar.isEventsUpdated) {
                  // sort of the catch-all sizing
                  // anything that might cause dimension changes
                  this.updateBaseSize(isResize, viewHeight, isAuto);
              }
              // NOTE: popScroll is called by CalendarComponent
          };
          View.prototype.updateBaseSize = function (isResize, viewHeight, isAuto) {
          };
          // Date Rendering
          // -----------------------------------------------------------------------------------------------------------------
          View.prototype.renderDatesWrap = function (dateProfile) {
              this.renderDates(dateProfile);
              this.addScroll({
                  duration: createDuration(this.context.options.scrollTime)
              });
          };
          View.prototype.unrenderDatesWrap = function () {
              this.stopNowIndicator();
              this.unrenderDates();
          };
          View.prototype.renderDates = function (dateProfile) { };
          View.prototype.unrenderDates = function () { };
          // Business Hours
          // -----------------------------------------------------------------------------------------------------------------
          View.prototype.renderBusinessHours = function (businessHours) { };
          View.prototype.unrenderBusinessHours = function () { };
          // Date Selection
          // -----------------------------------------------------------------------------------------------------------------
          View.prototype.renderDateSelectionWrap = function (selection) {
              if (selection) {
                  this.renderDateSelection(selection);
              }
          };
          View.prototype.unrenderDateSelectionWrap = function (selection) {
              if (selection) {
                  this.unrenderDateSelection(selection);
              }
          };
          View.prototype.renderDateSelection = function (selection) { };
          View.prototype.unrenderDateSelection = function (selection) { };
          // Event Rendering
          // -----------------------------------------------------------------------------------------------------------------
          View.prototype.renderEvents = function (eventStore) { };
          View.prototype.unrenderEvents = function () { };
          // util for subclasses
          View.prototype.sliceEvents = function (eventStore, allDay) {
              var props = this.props;
              return sliceEventStore(eventStore, props.eventUiBases, props.dateProfile.activeRange, allDay ? this.context.nextDayThreshold : null).fg;
          };
          // Event Selection
          // -----------------------------------------------------------------------------------------------------------------
          View.prototype.renderEventSelectionWrap = function (instanceId) {
              if (instanceId) {
                  this.renderEventSelection(instanceId);
              }
          };
          View.prototype.unrenderEventSelectionWrap = function (instanceId) {
              if (instanceId) {
                  this.unrenderEventSelection(instanceId);
              }
          };
          View.prototype.renderEventSelection = function (instanceId) { };
          View.prototype.unrenderEventSelection = function (instanceId) { };
          // Event Drag
          // -----------------------------------------------------------------------------------------------------------------
          View.prototype.renderEventDragWrap = function (state) {
              if (state) {
                  this.renderEventDrag(state);
              }
          };
          View.prototype.unrenderEventDragWrap = function (state) {
              if (state) {
                  this.unrenderEventDrag(state);
              }
          };
          View.prototype.renderEventDrag = function (state) { };
          View.prototype.unrenderEventDrag = function (state) { };
          // Event Resize
          // -----------------------------------------------------------------------------------------------------------------
          View.prototype.renderEventResizeWrap = function (state) {
              if (state) {
                  this.renderEventResize(state);
              }
          };
          View.prototype.unrenderEventResizeWrap = function (state) {
              if (state) {
                  this.unrenderEventResize(state);
              }
          };
          View.prototype.renderEventResize = function (state) { };
          View.prototype.unrenderEventResize = function (state) { };
          /* Now Indicator
          ------------------------------------------------------------------------------------------------------------------*/
          // Immediately render the current time indicator and begins re-rendering it at an interval,
          // which is defined by this.getNowIndicatorUnit().
          // TODO: somehow do this for the current whole day's background too
          // USAGE: must be called manually from subclasses' render methods! don't need to call stopNowIndicator tho
          View.prototype.startNowIndicator = function (dateProfile, dateProfileGenerator) {
              var _this = this;
              var _a = this.context, calendar = _a.calendar, dateEnv = _a.dateEnv, options = _a.options;
              var unit;
              var update;
              var delay; // ms wait value
              if (options.nowIndicator && !this.initialNowDate) {
                  unit = this.getNowIndicatorUnit(dateProfile, dateProfileGenerator);
                  if (unit) {
                      update = this.updateNowIndicator.bind(this);
                      this.initialNowDate = calendar.getNow();
                      this.initialNowQueriedMs = new Date().valueOf();
                      // wait until the beginning of the next interval
                      delay = dateEnv.add(dateEnv.startOf(this.initialNowDate, unit), createDuration(1, unit)).valueOf() - this.initialNowDate.valueOf();
                      // TODO: maybe always use setTimeout, waiting until start of next unit
                      this.nowIndicatorTimeoutID = setTimeout(function () {
                          _this.nowIndicatorTimeoutID = null;
                          update();
                          if (unit === 'second') {
                              delay = 1000; // every second
                          }
                          else {
                              delay = 1000 * 60; // otherwise, every minute
                          }
                          _this.nowIndicatorIntervalID = setInterval(update, delay); // update every interval
                      }, delay);
                  }
                  // rendering will be initiated in updateSize
              }
          };
          // rerenders the now indicator, computing the new current time from the amount of time that has passed
          // since the initial getNow call.
          View.prototype.updateNowIndicator = function () {
              if (this.props.dateProfile && // a way to determine if dates were rendered yet
                  this.initialNowDate // activated before?
              ) {
                  this.unrenderNowIndicator(); // won't unrender if unnecessary
                  this.renderNowIndicator(addMs(this.initialNowDate, new Date().valueOf() - this.initialNowQueriedMs));
                  this.isNowIndicatorRendered = true;
              }
          };
          // Immediately unrenders the view's current time indicator and stops any re-rendering timers.
          // Won't cause side effects if indicator isn't rendered.
          View.prototype.stopNowIndicator = function () {
              if (this.nowIndicatorTimeoutID) {
                  clearTimeout(this.nowIndicatorTimeoutID);
                  this.nowIndicatorTimeoutID = null;
              }
              if (this.nowIndicatorIntervalID) {
                  clearInterval(this.nowIndicatorIntervalID);
                  this.nowIndicatorIntervalID = null;
              }
              if (this.isNowIndicatorRendered) {
                  this.unrenderNowIndicator();
                  this.isNowIndicatorRendered = false;
              }
          };
          View.prototype.getNowIndicatorUnit = function (dateProfile, dateProfileGenerator) {
              // subclasses should implement
          };
          // Renders a current time indicator at the given datetime
          View.prototype.renderNowIndicator = function (date) {
              // SUBCLASSES MUST PASS TO CHILDREN!
          };
          // Undoes the rendering actions from renderNowIndicator
          View.prototype.unrenderNowIndicator = function () {
              // SUBCLASSES MUST PASS TO CHILDREN!
          };
          /* Scroller
          ------------------------------------------------------------------------------------------------------------------*/
          View.prototype.addScroll = function (scroll, isForced) {
              if (isForced) {
                  scroll.isForced = isForced;
              }
              __assign(this.queuedScroll || (this.queuedScroll = {}), scroll);
          };
          View.prototype.popScroll = function (isResize) {
              this.applyQueuedScroll(isResize);
              this.queuedScroll = null;
          };
          View.prototype.applyQueuedScroll = function (isResize) {
              if (this.queuedScroll) {
                  this.applyScroll(this.queuedScroll, isResize);
              }
          };
          View.prototype.queryScroll = function () {
              var scroll = {};
              if (this.props.dateProfile) { // dates rendered yet?
                  __assign(scroll, this.queryDateScroll());
              }
              return scroll;
          };
          View.prototype.applyScroll = function (scroll, isResize) {
              var duration = scroll.duration, isForced = scroll.isForced;
              if (duration != null && !isForced) {
                  delete scroll.duration;
                  if (this.props.dateProfile) { // dates rendered yet?
                      __assign(scroll, this.computeDateScroll(duration));
                  }
              }
              if (this.props.dateProfile) { // dates rendered yet?
                  this.applyDateScroll(scroll);
              }
          };
          View.prototype.computeDateScroll = function (duration) {
              return {}; // subclasses must implement
          };
          View.prototype.queryDateScroll = function () {
              return {}; // subclasses must implement
          };
          View.prototype.applyDateScroll = function (scroll) {
              // subclasses must implement
          };
          // for API
          View.prototype.scrollToDuration = function (duration) {
              this.applyScroll({ duration: duration }, false);
          };
          return View;
      }(DateComponent));
      EmitterMixin.mixInto(View);
      View.prototype.usesMinMaxTime = false;
      View.prototype.dateProfileGeneratorClass = DateProfileGenerator;
  
      var FgEventRenderer = /** @class */ (function () {
          function FgEventRenderer() {
              this.segs = [];
              this.isSizeDirty = false;
          }
          FgEventRenderer.prototype.renderSegs = function (context, segs, mirrorInfo) {
              this.context = context;
              this.rangeUpdated(); // called too frequently :(
              // render an `.el` on each seg
              // returns a subset of the segs. segs that were actually rendered
              segs = this.renderSegEls(segs, mirrorInfo);
              this.segs = segs;
              this.attachSegs(segs, mirrorInfo);
              this.isSizeDirty = true;
              triggerRenderedSegs(this.context, this.segs, Boolean(mirrorInfo));
          };
          FgEventRenderer.prototype.unrender = function (context, _segs, mirrorInfo) {
              triggerWillRemoveSegs(this.context, this.segs, Boolean(mirrorInfo));
              this.detachSegs(this.segs);
              this.segs = [];
          };
          // Updates values that rely on options and also relate to range
          FgEventRenderer.prototype.rangeUpdated = function () {
              var options = this.context.options;
              var displayEventTime;
              var displayEventEnd;
              this.eventTimeFormat = createFormatter(options.eventTimeFormat || this.computeEventTimeFormat(), options.defaultRangeSeparator);
              displayEventTime = options.displayEventTime;
              if (displayEventTime == null) {
                  displayEventTime = this.computeDisplayEventTime(); // might be based off of range
              }
              displayEventEnd = options.displayEventEnd;
              if (displayEventEnd == null) {
                  displayEventEnd = this.computeDisplayEventEnd(); // might be based off of range
              }
              this.displayEventTime = displayEventTime;
              this.displayEventEnd = displayEventEnd;
          };
          // Renders and assigns an `el` property for each foreground event segment.
          // Only returns segments that successfully rendered.
          FgEventRenderer.prototype.renderSegEls = function (segs, mirrorInfo) {
              var html = '';
              var i;
              if (segs.length) { // don't build an empty html string
                  // build a large concatenation of event segment HTML
                  for (i = 0; i < segs.length; i++) {
                      html += this.renderSegHtml(segs[i], mirrorInfo);
                  }
                  // Grab individual elements from the combined HTML string. Use each as the default rendering.
                  // Then, compute the 'el' for each segment. An el might be null if the eventRender callback returned false.
                  htmlToElements(html).forEach(function (el, i) {
                      var seg = segs[i];
                      if (el) {
                          seg.el = el;
                      }
                  });
                  segs = filterSegsViaEls(this.context, segs, Boolean(mirrorInfo));
              }
              return segs;
          };
          // Generic utility for generating the HTML classNames for an event segment's element
          FgEventRenderer.prototype.getSegClasses = function (seg, isDraggable, isResizable, mirrorInfo) {
              var classes = [
                  'fc-event',
                  seg.isStart ? 'fc-start' : 'fc-not-start',
                  seg.isEnd ? 'fc-end' : 'fc-not-end'
              ].concat(seg.eventRange.ui.classNames);
              if (isDraggable) {
                  classes.push('fc-draggable');
              }
              if (isResizable) {
                  classes.push('fc-resizable');
              }
              if (mirrorInfo) {
                  classes.push('fc-mirror');
                  if (mirrorInfo.isDragging) {
                      classes.push('fc-dragging');
                  }
                  if (mirrorInfo.isResizing) {
                      classes.push('fc-resizing');
                  }
              }
              return classes;
          };
          // Compute the text that should be displayed on an event's element.
          // `range` can be the Event object itself, or something range-like, with at least a `start`.
          // If event times are disabled, or the event has no time, will return a blank string.
          // If not specified, formatter will default to the eventTimeFormat setting,
          // and displayEnd will default to the displayEventEnd setting.
          FgEventRenderer.prototype.getTimeText = function (eventRange, formatter, displayEnd) {
              var def = eventRange.def, instance = eventRange.instance;
              return this._getTimeText(instance.range.start, def.hasEnd ? instance.range.end : null, def.allDay, formatter, displayEnd, instance.forcedStartTzo, instance.forcedEndTzo);
          };
          FgEventRenderer.prototype._getTimeText = function (start, end, allDay, formatter, displayEnd, forcedStartTzo, forcedEndTzo) {
              var dateEnv = this.context.dateEnv;
              if (formatter == null) {
                  formatter = this.eventTimeFormat;
              }
              if (displayEnd == null) {
                  displayEnd = this.displayEventEnd;
              }
              if (this.displayEventTime && !allDay) {
                  if (displayEnd && end) {
                      return dateEnv.formatRange(start, end, formatter, {
                          forcedStartTzo: forcedStartTzo,
                          forcedEndTzo: forcedEndTzo
                      });
                  }
                  else {
                      return dateEnv.format(start, formatter, {
                          forcedTzo: forcedStartTzo
                      });
                  }
              }
              return '';
          };
          FgEventRenderer.prototype.computeEventTimeFormat = function () {
              return {
                  hour: 'numeric',
                  minute: '2-digit',
                  omitZeroMinute: true
              };
          };
          FgEventRenderer.prototype.computeDisplayEventTime = function () {
              return true;
          };
          FgEventRenderer.prototype.computeDisplayEventEnd = function () {
              return true;
          };
          // Utility for generating event skin-related CSS properties
          FgEventRenderer.prototype.getSkinCss = function (ui) {
              return {
                  'background-color': ui.backgroundColor,
                  'border-color': ui.borderColor,
                  color: ui.textColor
              };
          };
          FgEventRenderer.prototype.sortEventSegs = function (segs) {
              var specs = this.context.eventOrderSpecs;
              var objs = segs.map(buildSegCompareObj);
              objs.sort(function (obj0, obj1) {
                  return compareByFieldSpecs(obj0, obj1, specs);
              });
              return objs.map(function (c) {
                  return c._seg;
              });
          };
          FgEventRenderer.prototype.computeSizes = function (force) {
              if (force || this.isSizeDirty) {
                  this.computeSegSizes(this.segs);
              }
          };
          FgEventRenderer.prototype.assignSizes = function (force) {
              if (force || this.isSizeDirty) {
                  this.assignSegSizes(this.segs);
                  this.isSizeDirty = false;
              }
          };
          FgEventRenderer.prototype.computeSegSizes = function (segs) {
          };
          FgEventRenderer.prototype.assignSegSizes = function (segs) {
          };
          // Manipulation on rendered segs
          FgEventRenderer.prototype.hideByHash = function (hash) {
              if (hash) {
                  for (var _i = 0, _a = this.segs; _i < _a.length; _i++) {
                      var seg = _a[_i];
                      if (hash[seg.eventRange.instance.instanceId]) {
                          seg.el.style.visibility = 'hidden';
                      }
                  }
              }
          };
          FgEventRenderer.prototype.showByHash = function (hash) {
              if (hash) {
                  for (var _i = 0, _a = this.segs; _i < _a.length; _i++) {
                      var seg = _a[_i];
                      if (hash[seg.eventRange.instance.instanceId]) {
                          seg.el.style.visibility = '';
                      }
                  }
              }
          };
          FgEventRenderer.prototype.selectByInstanceId = function (instanceId) {
              if (instanceId) {
                  for (var _i = 0, _a = this.segs; _i < _a.length; _i++) {
                      var seg = _a[_i];
                      var eventInstance = seg.eventRange.instance;
                      if (eventInstance && eventInstance.instanceId === instanceId &&
                          seg.el // necessary?
                      ) {
                          seg.el.classList.add('fc-selected');
                      }
                  }
              }
          };
          FgEventRenderer.prototype.unselectByInstanceId = function (instanceId) {
              if (instanceId) {
                  for (var _i = 0, _a = this.segs; _i < _a.length; _i++) {
                      var seg = _a[_i];
                      if (seg.el) { // necessary?
                          seg.el.classList.remove('fc-selected');
                      }
                  }
              }
          };
          return FgEventRenderer;
      }());
      // returns a object with all primitive props that can be compared
      function buildSegCompareObj(seg) {
          var eventDef = seg.eventRange.def;
          var range = seg.eventRange.instance.range;
          var start = range.start ? range.start.valueOf() : 0; // TODO: better support for open-range events
          var end = range.end ? range.end.valueOf() : 0; // "
          return __assign({}, eventDef.extendedProps, eventDef, { id: eventDef.publicId, start: start,
              end: end, duration: end - start, allDay: Number(eventDef.allDay), _seg: seg // for later retrieval
           });
      }
  
      /*
      TODO: when refactoring this class, make a new FillRenderer instance for each `type`
      */
      var FillRenderer = /** @class */ (function () {
          function FillRenderer() {
              this.fillSegTag = 'div';
              this.dirtySizeFlags = {};
              this.containerElsByType = {};
              this.segsByType = {};
          }
          FillRenderer.prototype.getSegsByType = function (type) {
              return this.segsByType[type] || [];
          };
          FillRenderer.prototype.renderSegs = function (type, context, segs) {
              var _a;
              this.context = context;
              var renderedSegs = this.renderSegEls(type, segs); // assignes `.el` to each seg. returns successfully rendered segs
              var containerEls = this.attachSegs(type, renderedSegs);
              if (containerEls) {
                  (_a = (this.containerElsByType[type] || (this.containerElsByType[type] = []))).push.apply(_a, containerEls);
              }
              this.segsByType[type] = renderedSegs;
              if (type === 'bgEvent') {
                  triggerRenderedSegs(context, renderedSegs, false); // isMirror=false
              }
              this.dirtySizeFlags[type] = true;
          };
          // Unrenders a specific type of fill that is currently rendered on the grid
          FillRenderer.prototype.unrender = function (type, context) {
              var segs = this.segsByType[type];
              if (segs) {
                  if (type === 'bgEvent') {
                      triggerWillRemoveSegs(context, segs, false); // isMirror=false
                  }
                  this.detachSegs(type, segs);
              }
          };
          // Renders and assigns an `el` property for each fill segment. Generic enough to work with different types.
          // Only returns segments that successfully rendered.
          FillRenderer.prototype.renderSegEls = function (type, segs) {
              var _this = this;
              var html = '';
              var i;
              if (segs.length) {
                  // build a large concatenation of segment HTML
                  for (i = 0; i < segs.length; i++) {
                      html += this.renderSegHtml(type, segs[i]);
                  }
                  // Grab individual elements from the combined HTML string. Use each as the default rendering.
                  // Then, compute the 'el' for each segment.
                  htmlToElements(html).forEach(function (el, i) {
                      var seg = segs[i];
                      if (el) {
                          seg.el = el;
                      }
                  });
                  if (type === 'bgEvent') {
                      segs = filterSegsViaEls(this.context, segs, false // isMirror. background events can never be mirror elements
                      );
                  }
                  // correct element type? (would be bad if a non-TD were inserted into a table for example)
                  segs = segs.filter(function (seg) {
                      return elementMatches(seg.el, _this.fillSegTag);
                  });
              }
              return segs;
          };
          // Builds the HTML needed for one fill segment. Generic enough to work with different types.
          FillRenderer.prototype.renderSegHtml = function (type, seg) {
              var css = null;
              var classNames = [];
              if (type !== 'highlight' && type !== 'businessHours') {
                  css = {
                      'background-color': seg.eventRange.ui.backgroundColor
                  };
              }
              if (type !== 'highlight') {
                  classNames = classNames.concat(seg.eventRange.ui.classNames);
              }
              if (type === 'businessHours') {
                  classNames.push('fc-bgevent');
              }
              else {
                  classNames.push('fc-' + type.toLowerCase());
              }
              return '<' + this.fillSegTag +
                  (classNames.length ? ' class="' + classNames.join(' ') + '"' : '') +
                  (css ? ' style="' + cssToStr(css) + '"' : '') +
                  '></' + this.fillSegTag + '>';
          };
          FillRenderer.prototype.detachSegs = function (type, segs) {
              var containerEls = this.containerElsByType[type];
              if (containerEls) {
                  containerEls.forEach(removeElement);
                  delete this.containerElsByType[type];
              }
          };
          FillRenderer.prototype.computeSizes = function (force) {
              for (var type in this.segsByType) {
                  if (force || this.dirtySizeFlags[type]) {
                      this.computeSegSizes(this.segsByType[type]);
                  }
              }
          };
          FillRenderer.prototype.assignSizes = function (force) {
              for (var type in this.segsByType) {
                  if (force || this.dirtySizeFlags[type]) {
                      this.assignSegSizes(this.segsByType[type]);
                  }
              }
              this.dirtySizeFlags = {};
          };
          FillRenderer.prototype.computeSegSizes = function (segs) {
          };
          FillRenderer.prototype.assignSegSizes = function (segs) {
          };
          return FillRenderer;
      }());
  
      var NamedTimeZoneImpl = /** @class */ (function () {
          function NamedTimeZoneImpl(timeZoneName) {
              this.timeZoneName = timeZoneName;
          }
          return NamedTimeZoneImpl;
      }());
  
      /*
      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
      */
      var ElementDragging = /** @class */ (function () {
          function ElementDragging(el) {
              this.emitter = new EmitterMixin();
          }
          ElementDragging.prototype.destroy = function () {
          };
          ElementDragging.prototype.setMirrorIsVisible = function (bool) {
              // optional if subclass doesn't want to support a mirror
          };
          ElementDragging.prototype.setMirrorNeedsRevert = function (bool) {
              // optional if subclass doesn't want to support a mirror
          };
          ElementDragging.prototype.setAutoScrollEnabled = function (bool) {
              // optional
          };
          return ElementDragging;
      }());
  
      function formatDate(dateInput, settings) {
          if (settings === void 0) { settings = {}; }
          var dateEnv = buildDateEnv$1(settings);
          var formatter = createFormatter(settings);
          var dateMeta = dateEnv.createMarkerMeta(dateInput);
          if (!dateMeta) { // TODO: warning?
              return '';
          }
          return dateEnv.format(dateMeta.marker, formatter, {
              forcedTzo: dateMeta.forcedTzo
          });
      }
      function formatRange(startInput, endInput, settings // mixture of env and formatter settings
      ) {
          var dateEnv = buildDateEnv$1(typeof settings === 'object' && settings ? settings : {}); // pass in if non-null object
          var formatter = createFormatter(settings, globalDefaults.defaultRangeSeparator);
          var startMeta = dateEnv.createMarkerMeta(startInput);
          var 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: settings.isEndExclusive
          });
      }
      // TODO: more DRY and optimized
      function buildDateEnv$1(settings) {
          var locale = buildLocale(settings.locale || 'en', parseRawLocales([]).map); // TODO: don't hardcode 'en' everywhere
          // ensure required settings
          settings = __assign({ timeZone: globalDefaults.timeZone, calendarSystem: 'gregory' }, settings, { locale: locale });
          return new DateEnv(settings);
      }
  
      var DRAG_META_PROPS = {
          startTime: createDuration,
          duration: createDuration,
          create: Boolean,
          sourceId: String
      };
      var DRAG_META_DEFAULTS = {
          create: true
      };
      function parseDragMeta(raw) {
          var leftoverProps = {};
          var refined = refineProps(raw, DRAG_META_PROPS, DRAG_META_DEFAULTS, leftoverProps);
          refined.leftoverProps = leftoverProps;
          return refined;
      }
  
      // 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 { weekday: 'short' }; // "Sat"
          }
          else if (dayCnt > 1) {
              return { weekday: 'short', month: 'numeric', day: 'numeric', omitCommas: true }; // "Sat 11/12"
          }
          else {
              return { weekday: 'long' }; // "Saturday"
          }
      }
      function renderDateCell(dateMarker, dateProfile, datesRepDistinctDays, colCnt, colHeadFormat, context, colspan, otherAttrs) {
          var dateEnv = context.dateEnv, theme = context.theme, options = context.options;
          var isDateValid = rangeContainsMarker(dateProfile.activeRange, dateMarker); // TODO: called too frequently. cache somehow.
          var classNames = [
              'fc-day-header',
              theme.getClass('widgetHeader')
          ];
          var innerHtml;
          if (typeof options.columnHeaderHtml === 'function') {
              innerHtml = options.columnHeaderHtml(dateEnv.toDate(dateMarker));
          }
          else if (typeof options.columnHeaderText === 'function') {
              innerHtml = htmlEscape(options.columnHeaderText(dateEnv.toDate(dateMarker)));
          }
          else {
              innerHtml = htmlEscape(dateEnv.format(dateMarker, colHeadFormat));
          }
          // if only one row of days, the classNames on the header can represent the specific days beneath
          if (datesRepDistinctDays) {
              classNames = classNames.concat(
              // includes the day-of-week class
              // noThemeHighlight=true (don't highlight the header)
              getDayClasses(dateMarker, dateProfile, context, true));
          }
          else {
              classNames.push('fc-' + DAY_IDS[dateMarker.getUTCDay()]); // only add the day-of-week class
          }
          return '' +
              '<th class="' + classNames.join(' ') + '"' +
              ((isDateValid && datesRepDistinctDays) ?
                  ' data-date="' + dateEnv.formatIso(dateMarker, { omitTime: true }) + '"' :
                  '') +
              (colspan > 1 ?
                  ' colspan="' + colspan + '"' :
                  '') +
              (otherAttrs ?
                  ' ' + otherAttrs :
                  '') +
              '>' +
              (isDateValid ?
                  // don't make a link if the heading could represent multiple days, or if there's only one day (forceOff)
                  buildGotoAnchorHtml(options, dateEnv, { date: dateMarker, forceOff: !datesRepDistinctDays || colCnt === 1 }, innerHtml) :
                  // if not valid, display text, but no link
                  innerHtml) +
              '</th>';
      }
  
      var DayHeader = /** @class */ (function (_super) {
          __extends(DayHeader, _super);
          function DayHeader(parentEl) {
              var _this = _super.call(this) || this;
              _this.renderSkeleton = memoizeRendering(_this._renderSkeleton, _this._unrenderSkeleton);
              _this.parentEl = parentEl;
              return _this;
          }
          DayHeader.prototype.render = function (props, context) {
              var dates = props.dates, datesRepDistinctDays = props.datesRepDistinctDays;
              var parts = [];
              this.renderSkeleton(context);
              if (props.renderIntroHtml) {
                  parts.push(props.renderIntroHtml());
              }
              var colHeadFormat = createFormatter(context.options.columnHeaderFormat ||
                  computeFallbackHeaderFormat(datesRepDistinctDays, dates.length));
              for (var _i = 0, dates_1 = dates; _i < dates_1.length; _i++) {
                  var date = dates_1[_i];
                  parts.push(renderDateCell(date, props.dateProfile, datesRepDistinctDays, dates.length, colHeadFormat, context));
              }
              if (context.isRtl) {
                  parts.reverse();
              }
              this.thead.innerHTML = '<tr>' + parts.join('') + '</tr>';
          };
          DayHeader.prototype.destroy = function () {
              _super.prototype.destroy.call(this);
              this.renderSkeleton.unrender();
          };
          DayHeader.prototype._renderSkeleton = function (context) {
              var theme = context.theme;
              var parentEl = this.parentEl;
              parentEl.innerHTML = ''; // because might be nbsp
              parentEl.appendChild(this.el = htmlToElement('<div class="fc-row ' + theme.getClass('headerRow') + '">' +
                  '<table class="' + theme.getClass('tableGrid') + '">' +
                  '<thead></thead>' +
                  '</table>' +
                  '</div>'));
              this.thead = this.el.querySelector('thead');
          };
          DayHeader.prototype._unrenderSkeleton = function () {
              removeElement(this.el);
          };
          return DayHeader;
      }(Component));
  
      var DaySeries = /** @class */ (function () {
          function DaySeries(range, dateProfileGenerator) {
              var date = range.start;
              var end = range.end;
              var indices = [];
              var dates = [];
              var 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++;
                      indices.push(dayIndex);
                      dates.push(date);
                  }
                  date = addDays(date, 1);
              }
              this.dates = dates;
              this.indices = indices;
              this.cnt = dates.length;
          }
          DaySeries.prototype.sliceRange = function (range) {
              var firstIndex = this.getDateDayIndex(range.start); // inclusive first index
              var lastIndex = this.getDateDayIndex(addDays(range.end, -1)); // inclusive last index
              var clippedFirstIndex = Math.max(0, firstIndex);
              var 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
                  };
              }
              else {
                  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.
          DaySeries.prototype.getDateDayIndex = function (date) {
              var indices = this.indices;
              var dayOffset = Math.floor(diffDays(this.dates[0], date));
              if (dayOffset < 0) {
                  return indices[0] - 1;
              }
              else if (dayOffset >= indices.length) {
                  return indices[indices.length - 1] + 1;
              }
              else {
                  return indices[dayOffset];
              }
          };
          return DaySeries;
      }());
  
      var DayTable = /** @class */ (function () {
          function DayTable(daySeries, breakOnWeeks) {
              var dates = daySeries.dates;
              var daysPerRow;
              var firstDay;
              var rowCnt;
              if (breakOnWeeks) {
                  // count columns until the day-of-week repeats
                  firstDay = dates[0].getUTCDay();
                  for (daysPerRow = 1; daysPerRow < dates.length; daysPerRow++) {
                      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();
          }
          DayTable.prototype.buildCells = function () {
              var rows = [];
              for (var row = 0; row < this.rowCnt; row++) {
                  var cells = [];
                  for (var col = 0; col < this.colCnt; col++) {
                      cells.push(this.buildCell(row, col));
                  }
                  rows.push(cells);
              }
              return rows;
          };
          DayTable.prototype.buildCell = function (row, col) {
              return {
                  date: this.daySeries.dates[row * this.colCnt + col]
              };
          };
          DayTable.prototype.buildHeaderDates = function () {
              var dates = [];
              for (var col = 0; col < this.colCnt; col++) {
                  dates.push(this.cells[0][col].date);
              }
              return dates;
          };
          DayTable.prototype.sliceRange = function (range) {
              var colCnt = this.colCnt;
              var seriesSeg = this.daySeries.sliceRange(range);
              var segs = [];
              if (seriesSeg) {
                  var firstIndex = seriesSeg.firstIndex, lastIndex = seriesSeg.lastIndex;
                  var index = firstIndex;
                  while (index <= lastIndex) {
                      var row = Math.floor(index / colCnt);
                      var nextIndex = Math.min((row + 1) * colCnt, lastIndex + 1);
                      segs.push({
                          row: row,
                          firstCol: index % colCnt,
                          lastCol: (nextIndex - 1) % colCnt,
                          isStart: seriesSeg.isStart && index === firstIndex,
                          isEnd: seriesSeg.isEnd && (nextIndex - 1) === lastIndex
                      });
                      index = nextIndex;
                  }
              }
              return segs;
          };
          return DayTable;
      }());
  
      var Slicer = /** @class */ (function () {
          function Slicer() {
              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);
          }
          Slicer.prototype.sliceProps = function (props, dateProfile, nextDayThreshold, calendar, component) {
              var extraArgs = [];
              for (var _i = 5; _i < arguments.length; _i++) {
                  extraArgs[_i - 5] = arguments[_i];
              }
              var eventUiBases = props.eventUiBases;
              var eventSegs = this.sliceEventStore.apply(this, [props.eventStore, eventUiBases, dateProfile, nextDayThreshold, component].concat(extraArgs));
              return {
                  dateSelectionSegs: this.sliceDateSelection.apply(this, [props.dateSelection, eventUiBases, component].concat(extraArgs)),
                  businessHourSegs: this.sliceBusinessHours.apply(this, [props.businessHours, dateProfile, nextDayThreshold, calendar, component].concat(extraArgs)),
                  fgEventSegs: eventSegs.fg,
                  bgEventSegs: eventSegs.bg,
                  eventDrag: this.sliceEventDrag.apply(this, [props.eventDrag, eventUiBases, dateProfile, nextDayThreshold, component].concat(extraArgs)),
                  eventResize: this.sliceEventResize.apply(this, [props.eventResize, eventUiBases, dateProfile, nextDayThreshold, component].concat(extraArgs)),
                  eventSelection: props.eventSelection
              }; // TODO: give interactionSegs?
          };
          Slicer.prototype.sliceNowDate = function (// does not memoize
          date, component) {
              var extraArgs = [];
              for (var _i = 2; _i < arguments.length; _i++) {
                  extraArgs[_i - 2] = arguments[_i];
              }
              return this._sliceDateSpan.apply(this, [{ range: { start: date, end: addMs(date, 1) }, allDay: false },
                  {},
                  component].concat(extraArgs));
          };
          Slicer.prototype._sliceBusinessHours = function (businessHours, dateProfile, nextDayThreshold, calendar, component) {
              var extraArgs = [];
              for (var _i = 5; _i < arguments.length; _i++) {
                  extraArgs[_i - 5] = arguments[_i];
              }
              if (!businessHours) {
                  return [];
              }
              return this._sliceEventStore.apply(this, [expandRecurring(businessHours, computeActiveRange(dateProfile, Boolean(nextDayThreshold)), calendar),
                  {},
                  dateProfile,
                  nextDayThreshold,
                  component].concat(extraArgs)).bg;
          };
          Slicer.prototype._sliceEventStore = function (eventStore, eventUiBases, dateProfile, nextDayThreshold, component) {
              var extraArgs = [];
              for (var _i = 5; _i < arguments.length; _i++) {
                  extraArgs[_i - 5] = arguments[_i];
              }
              if (eventStore) {
                  var rangeRes = sliceEventStore(eventStore, eventUiBases, computeActiveRange(dateProfile, Boolean(nextDayThreshold)), nextDayThreshold);
                  return {
                      bg: this.sliceEventRanges(rangeRes.bg, component, extraArgs),
                      fg: this.sliceEventRanges(rangeRes.fg, component, extraArgs)
                  };
              }
              else {
                  return { bg: [], fg: [] };
              }
          };
          Slicer.prototype._sliceInteraction = function (interaction, eventUiBases, dateProfile, nextDayThreshold, component) {
              var extraArgs = [];
              for (var _i = 5; _i < arguments.length; _i++) {
                  extraArgs[_i - 5] = arguments[_i];
              }
              if (!interaction) {
                  return null;
              }
              var rangeRes = sliceEventStore(interaction.mutatedEvents, eventUiBases, computeActiveRange(dateProfile, Boolean(nextDayThreshold)), nextDayThreshold);
              return {
                  segs: this.sliceEventRanges(rangeRes.fg, component, extraArgs),
                  affectedInstances: interaction.affectedEvents.instances,
                  isEvent: interaction.isEvent,
                  sourceSeg: interaction.origSeg
              };
          };
          Slicer.prototype._sliceDateSpan = function (dateSpan, eventUiBases, component) {
              var extraArgs = [];
              for (var _i = 3; _i < arguments.length; _i++) {
                  extraArgs[_i - 3] = arguments[_i];
              }
              if (!dateSpan) {
                  return [];
              }
              var eventRange = fabricateEventRange(dateSpan, eventUiBases, component.context.calendar);
              var segs = this.sliceRange.apply(this, [dateSpan.range].concat(extraArgs));
              for (var _a = 0, segs_1 = segs; _a < segs_1.length; _a++) {
                  var seg = segs_1[_a];
                  seg.component = component;
                  seg.eventRange = eventRange;
              }
              return segs;
          };
          /*
          "complete" seg means it has component and eventRange
          */
          Slicer.prototype.sliceEventRanges = function (eventRanges, component, // TODO: kill
          extraArgs) {
              var segs = [];
              for (var _i = 0, eventRanges_1 = eventRanges; _i < eventRanges_1.length; _i++) {
                  var eventRange = eventRanges_1[_i];
                  segs.push.apply(segs, this.sliceEventRange(eventRange, component, extraArgs));
              }
              return segs;
          };
          /*
          "complete" seg means it has component and eventRange
          */
          Slicer.prototype.sliceEventRange = function (eventRange, component, // TODO: kill
          extraArgs) {
              var segs = this.sliceRange.apply(this, [eventRange.range].concat(extraArgs));
              for (var _i = 0, segs_2 = segs; _i < segs_2.length; _i++) {
                  var seg = segs_2[_i];
                  seg.component = component;
                  seg.eventRange = eventRange;
                  seg.isStart = eventRange.isStart && seg.isStart;
                  seg.isEnd = eventRange.isEnd && seg.isEnd;
              }
              return segs;
          };
          return Slicer;
      }());
      /*
      for incorporating minTime/maxTime if appropriate
      TODO: should be part of DateProfile!
      TimelineDateProfile already does this btw
      */
      function computeActiveRange(dateProfile, isComponentAllDay) {
          var range = dateProfile.activeRange;
          if (isComponentAllDay) {
              return range;
          }
          return {
              start: addMs(range.start, dateProfile.minTime.milliseconds),
              end: addMs(range.end, dateProfile.maxTime.milliseconds - 864e5) // 864e5 = ms in a day
          };
      }
  
      // exports
      // --------------------------------------------------------------------------------------------------
      var version = '4.4.2';
  
      exports.Calendar = Calendar;
      exports.Component = Component;
      exports.ComponentContext = ComponentContext;
      exports.DateComponent = DateComponent;
      exports.DateEnv = DateEnv;
      exports.DateProfileGenerator = DateProfileGenerator;
      exports.DayHeader = DayHeader;
      exports.DaySeries = DaySeries;
      exports.DayTable = DayTable;
      exports.ElementDragging = ElementDragging;
      exports.ElementScrollController = ElementScrollController;
      exports.EmitterMixin = EmitterMixin;
      exports.EventApi = EventApi;
      exports.FgEventRenderer = FgEventRenderer;
      exports.FillRenderer = FillRenderer;
      exports.Interaction = Interaction;
      exports.Mixin = Mixin;
      exports.NamedTimeZoneImpl = NamedTimeZoneImpl;
      exports.PositionCache = PositionCache;
      exports.ScrollComponent = ScrollComponent;
      exports.ScrollController = ScrollController;
      exports.Slicer = Slicer;
      exports.Splitter = Splitter;
      exports.Theme = Theme;
      exports.View = View;
      exports.WindowScrollController = WindowScrollController;
      exports.addDays = addDays;
      exports.addDurations = addDurations;
      exports.addMs = addMs;
      exports.addWeeks = addWeeks;
      exports.allowContextMenu = allowContextMenu;
      exports.allowSelection = allowSelection;
      exports.appendToElement = appendToElement;
      exports.applyAll = applyAll;
      exports.applyMutationToEventStore = applyMutationToEventStore;
      exports.applyStyle = applyStyle;
      exports.applyStyleProp = applyStyleProp;
      exports.asRoughMinutes = asRoughMinutes;
      exports.asRoughMs = asRoughMs;
      exports.asRoughSeconds = asRoughSeconds;
      exports.buildGotoAnchorHtml = buildGotoAnchorHtml;
      exports.buildSegCompareObj = buildSegCompareObj;
      exports.capitaliseFirstLetter = capitaliseFirstLetter;
      exports.combineEventUis = combineEventUis;
      exports.compareByFieldSpec = compareByFieldSpec;
      exports.compareByFieldSpecs = compareByFieldSpecs;
      exports.compareNumbers = compareNumbers;
      exports.compensateScroll = compensateScroll;
      exports.computeClippingRect = computeClippingRect;
      exports.computeEdges = computeEdges;
      exports.computeEventDraggable = computeEventDraggable;
      exports.computeEventEndResizable = computeEventEndResizable;
      exports.computeEventStartResizable = computeEventStartResizable;
      exports.computeFallbackHeaderFormat = computeFallbackHeaderFormat;
      exports.computeHeightAndMargins = computeHeightAndMargins;
      exports.computeInnerRect = computeInnerRect;
      exports.computeRect = computeRect;
      exports.computeVisibleDayRange = computeVisibleDayRange;
      exports.config = config;
      exports.constrainPoint = constrainPoint;
      exports.createDuration = createDuration;
      exports.createElement = createElement;
      exports.createEmptyEventStore = createEmptyEventStore;
      exports.createEventInstance = createEventInstance;
      exports.createFormatter = createFormatter;
      exports.createPlugin = createPlugin;
      exports.cssToStr = cssToStr;
      exports.debounce = debounce;
      exports.diffDates = diffDates;
      exports.diffDayAndTime = diffDayAndTime;
      exports.diffDays = diffDays;
      exports.diffPoints = diffPoints;
      exports.diffWeeks = diffWeeks;
      exports.diffWholeDays = diffWholeDays;
      exports.diffWholeWeeks = diffWholeWeeks;
      exports.disableCursor = disableCursor;
      exports.distributeHeight = distributeHeight;
      exports.elementClosest = elementClosest;
      exports.elementMatches = elementMatches;
      exports.enableCursor = enableCursor;
      exports.eventTupleToStore = eventTupleToStore;
      exports.filterEventStoreDefs = filterEventStoreDefs;
      exports.filterHash = filterHash;
      exports.findChildren = findChildren;
      exports.findElements = findElements;
      exports.flexibleCompare = flexibleCompare;
      exports.forceClassName = forceClassName;
      exports.formatDate = formatDate;
      exports.formatIsoTimeString = formatIsoTimeString;
      exports.formatRange = formatRange;
      exports.getAllDayHtml = getAllDayHtml;
      exports.getClippingParents = getClippingParents;
      exports.getDayClasses = getDayClasses;
      exports.getElSeg = getElSeg;
      exports.getRectCenter = getRectCenter;
      exports.getRelevantEvents = getRelevantEvents;
      exports.globalDefaults = globalDefaults;
      exports.greatestDurationDenominator = greatestDurationDenominator;
      exports.hasBgRendering = hasBgRendering;
      exports.htmlEscape = htmlEscape;
      exports.htmlToElement = htmlToElement;
      exports.insertAfterElement = insertAfterElement;
      exports.interactionSettingsStore = interactionSettingsStore;
      exports.interactionSettingsToStore = interactionSettingsToStore;
      exports.intersectRanges = intersectRanges;
      exports.intersectRects = intersectRects;
      exports.isArraysEqual = isArraysEqual;
      exports.isDateSpansEqual = isDateSpansEqual;
      exports.isInt = isInt;
      exports.isInteractionValid = isInteractionValid;
      exports.isMultiDayRange = isMultiDayRange;
      exports.isPropsEqual = isPropsEqual;
      exports.isPropsValid = isPropsValid;
      exports.isSingleDay = isSingleDay;
      exports.isValidDate = isValidDate;
      exports.listenBySelector = listenBySelector;
      exports.mapHash = mapHash;
      exports.matchCellWidths = matchCellWidths;
      exports.memoize = memoize;
      exports.memoizeOutput = memoizeOutput;
      exports.memoizeRendering = memoizeRendering;
      exports.mergeEventStores = mergeEventStores;
      exports.multiplyDuration = multiplyDuration;
      exports.padStart = padStart;
      exports.parseBusinessHours = parseBusinessHours;
      exports.parseDragMeta = parseDragMeta;
      exports.parseEventDef = parseEventDef;
      exports.parseFieldSpecs = parseFieldSpecs;
      exports.parseMarker = parse;
      exports.pointInsideRect = pointInsideRect;
      exports.prependToElement = prependToElement;
      exports.preventContextMenu = preventContextMenu;
      exports.preventDefault = preventDefault;
      exports.preventSelection = preventSelection;
      exports.processScopedUiProps = processScopedUiProps;
      exports.rangeContainsMarker = rangeContainsMarker;
      exports.rangeContainsRange = rangeContainsRange;
      exports.rangesEqual = rangesEqual;
      exports.rangesIntersect = rangesIntersect;
      exports.refineProps = refineProps;
      exports.removeElement = removeElement;
      exports.removeExact = removeExact;
      exports.renderDateCell = renderDateCell;
      exports.requestJson = requestJson;
      exports.sliceEventStore = sliceEventStore;
      exports.startOfDay = startOfDay;
      exports.subtractInnerElHeight = subtractInnerElHeight;
      exports.translateRect = translateRect;
      exports.uncompensateScroll = uncompensateScroll;
      exports.undistributeHeight = undistributeHeight;
      exports.unpromisify = unpromisify;
      exports.version = version;
      exports.whenTransitionDone = whenTransitionDone;
      exports.wholeDivideDurations = wholeDivideDurations;
  
      Object.defineProperty(exports, '__esModule', { value: true });
  
  }));
  