bootstrap.js

      var container = SelectorEngine.findOne(this._selector);

      if (actives) {
        var tempActiveData = actives.filter(function (elem) {
          return container !== elem;
        });
        activesData = tempActiveData[0] ? Data.getData(tempActiveData[0], DATA_KEY$3) : null;

        if (activesData && activesData._isTransitioning) {
          return;
        }
      }

      var startEvent = EventHandler.trigger(this._element, Event$4.SHOW);

      if (startEvent.defaultPrevented) {
        return;
      }

      if (actives) {
        actives.forEach(function (elemActive) {
          if (container !== elemActive) {
            Collapse.collapseInterface(elemActive, 'hide');
          }

          if (!activesData) {
            Data.setData(elemActive, DATA_KEY$3, null);
          }
        });
      }

      var dimension = this._getDimension();

      this._element.classList.remove(ClassName$3.COLLAPSE);

      this._element.classList.add(ClassName$3.COLLAPSING);

      this._element.style[dimension] = 0;

      if (this._triggerArray.length) {
        this._triggerArray.forEach(function (element) {
          element.classList.remove(ClassName$3.COLLAPSED);
          element.setAttribute('aria-expanded', true);
        });
      }

      this.setTransitioning(true);

      var complete = function complete() {
        _this._element.classList.remove(ClassName$3.COLLAPSING);

        _this._element.classList.add(ClassName$3.COLLAPSE);

        _this._element.classList.add(ClassName$3.SHOW);

        _this._element.style[dimension] = '';

        _this.setTransitioning(false);

        EventHandler.trigger(_this._element, Event$4.SHOWN);
      };

      var capitalizedDimension = dimension[0].toUpperCase() + dimension.slice(1);
      var scrollSize = "scroll" + capitalizedDimension;
      var transitionDuration = getTransitionDurationFromElement(this._element);
      EventHandler.one(this._element, TRANSITION_END, complete);
      emulateTransitionEnd(this._element, transitionDuration);
      this._element.style[dimension] = this._element[scrollSize] + "px";
    };

    _proto.hide = function hide() {
      var _this2 = this;

      if (this._isTransitioning || !this._element.classList.contains(ClassName$3.SHOW)) {
        return;
      }

      var startEvent = EventHandler.trigger(this._element, Event$4.HIDE);

      if (startEvent.defaultPrevented) {
        return;
      }

      var dimension = this._getDimension();

      this._element.style[dimension] = this._element.getBoundingClientRect()[dimension] + "px";
      reflow(this._element);

      this._element.classList.add(ClassName$3.COLLAPSING);

      this._element.classList.remove(ClassName$3.COLLAPSE);

      this._element.classList.remove(ClassName$3.SHOW);

      var triggerArrayLength = this._triggerArray.length;

      if (triggerArrayLength > 0) {
        for (var i = 0; i < triggerArrayLength; i++) {
          var trigger = this._triggerArray[i];
          var elem = getElementFromSelector(trigger);

          if (elem && !elem.classList.contains(ClassName$3.SHOW)) {
            trigger.classList.add(ClassName$3.COLLAPSED);
            trigger.setAttribute('aria-expanded', false);
          }
        }
      }

      this.setTransitioning(true);

      var complete = function complete() {
        _this2.setTransitioning(false);

        _this2._element.classList.remove(ClassName$3.COLLAPSING);

        _this2._element.classList.add(ClassName$3.COLLAPSE);

        EventHandler.trigger(_this2._element, Event$4.HIDDEN);
      };

      this._element.style[dimension] = '';
      var transitionDuration = getTransitionDurationFromElement(this._element);
      EventHandler.one(this._element, TRANSITION_END, complete);
      emulateTransitionEnd(this._element, transitionDuration);
    };

    _proto.setTransitioning = function setTransitioning(isTransitioning) {
      this._isTransitioning = isTransitioning;
    };

    _proto.dispose = function dispose() {
      Data.removeData(this._element, DATA_KEY$3);
      this._config = null;
      this._parent = null;
      this._element = null;
      this._triggerArray = null;
      this._isTransitioning = null;
    } // Private
    ;

    _proto._getConfig = function _getConfig(config) {
      config = _objectSpread2({}, Default$1, {}, config);
      config.toggle = Boolean(config.toggle); // Coerce string values

      typeCheckConfig(NAME$3, config, DefaultType$1);
      return config;
    };

    _proto._getDimension = function _getDimension() {
      var hasWidth = this._element.classList.contains(Dimension.WIDTH);

      return hasWidth ? Dimension.WIDTH : Dimension.HEIGHT;
    };

    _proto._getParent = function _getParent() {
      var _this3 = this;

      var parent = this._config.parent;

      if (isElement(parent)) {
        // it's a jQuery object
        if (typeof parent.jquery !== 'undefined' || typeof parent[0] !== 'undefined') {
          parent = parent[0];
        }
      } else {
        parent = SelectorEngine.findOne(parent);
      }

      var selector = "[data-toggle=\"collapse\"][data-parent=\"" + parent + "\"]";
      makeArray(SelectorEngine.find(selector, parent)).forEach(function (element) {
        var selected = getElementFromSelector(element);

        _this3._addAriaAndCollapsedClass(selected, [element]);
      });
      return parent;
    };

    _proto._addAriaAndCollapsedClass = function _addAriaAndCollapsedClass(element, triggerArray) {
      if (element) {
        var isOpen = element.classList.contains(ClassName$3.SHOW);

        if (triggerArray.length) {
          triggerArray.forEach(function (elem) {
            if (isOpen) {
              elem.classList.remove(ClassName$3.COLLAPSED);
            } else {
              elem.classList.add(ClassName$3.COLLAPSED);
            }

            elem.setAttribute('aria-expanded', isOpen);
          });
        }
      }
    } // Static
    ;

    Collapse.collapseInterface = function collapseInterface(element, config) {
      var data = Data.getData(element, DATA_KEY$3);

      var _config = _objectSpread2({}, Default$1, {}, Manipulator.getDataAttributes(element), {}, typeof config === 'object' && config ? config : {});

      if (!data && _config.toggle && /show|hide/.test(config)) {
        _config.toggle = false;
      }

      if (!data) {
        data = new Collapse(element, _config);
      }

      if (typeof config === 'string') {
        if (typeof data[config] === 'undefined') {
          throw new TypeError("No method named \"" + config + "\"");
        }

        data[config]();
      }
    };

    Collapse.jQueryInterface = function jQueryInterface(config) {
      return this.each(function () {
        Collapse.collapseInterface(this, config);
      });
    };

    Collapse.getInstance = function getInstance(element) {
      return Data.getData(element, DATA_KEY$3);
    };

    _createClass(Collapse, null, [{
      key: "VERSION",
      get: function get() {
        return VERSION$3;
      }
    }, {
      key: "Default",
      get: function get() {
        return Default$1;
      }
    }]);

    return Collapse;
  }();
  /**
   * ------------------------------------------------------------------------
   * Data Api implementation
   * ------------------------------------------------------------------------
   */


  EventHandler.on(document, Event$4.CLICK_DATA_API, Selector$3.DATA_TOGGLE, function (event) {
    // preventDefault only for <a> elements (which change the URL) not inside the collapsible element
    if (event.target.tagName === 'A') {
      event.preventDefault();
    }

    var triggerData = Manipulator.getDataAttributes(this);
    var selector = getSelectorFromElement(this);
    var selectorElements = makeArray(SelectorEngine.find(selector));
    selectorElements.forEach(function (element) {
      var data = Data.getData(element, DATA_KEY$3);
      var config;

      if (data) {
        // update parent attribute
        if (data._parent === null && typeof triggerData.parent === 'string') {
          data._config.parent = triggerData.parent;
          data._parent = data._getParent();
        }

        config = 'toggle';
      } else {
        config = triggerData;
      }

      Collapse.collapseInterface(element, config);
    });
  });
  var $$4 = getjQuery();
  /**
   * ------------------------------------------------------------------------
   * jQuery
   * ------------------------------------------------------------------------
   * add .collapse to jQuery only if jQuery is present
   */

  /* istanbul ignore if */

  if ($$4) {
    var JQUERY_NO_CONFLICT$3 = $$4.fn[NAME$3];
    $$4.fn[NAME$3] = Collapse.jQueryInterface;
    $$4.fn[NAME$3].Constructor = Collapse;

    $$4.fn[NAME$3].noConflict = function () {
      $$4.fn[NAME$3] = JQUERY_NO_CONFLICT$3;
      return Collapse.jQueryInterface;
    };
  }

  /**
   * ------------------------------------------------------------------------
   * Constants
   * ------------------------------------------------------------------------
   */

  var NAME$4 = 'dropdown';
  var VERSION$4 = '4.3.1';
  var DATA_KEY$4 = 'bs.dropdown';
  var EVENT_KEY$4 = "." + DATA_KEY$4;
  var DATA_API_KEY$4 = '.data-api';
  var ESCAPE_KEYCODE = 27; // KeyboardEvent.which value for Escape (Esc) key

  var SPACE_KEYCODE = 32; // KeyboardEvent.which value for space key

  var TAB_KEYCODE = 9; // KeyboardEvent.which value for tab key

  var ARROW_UP_KEYCODE = 38; // KeyboardEvent.which value for up arrow key

  var ARROW_DOWN_KEYCODE = 40; // KeyboardEvent.which value for down arrow key

  var RIGHT_MOUSE_BUTTON_WHICH = 3; // MouseEvent.which value for the right button (assuming a right-handed mouse)

  var REGEXP_KEYDOWN = new RegExp(ARROW_UP_KEYCODE + "|" + ARROW_DOWN_KEYCODE + "|" + ESCAPE_KEYCODE);
  var Event$5 = {
    HIDE: "hide" + EVENT_KEY$4,
    HIDDEN: "hidden" + EVENT_KEY$4,
    SHOW: "show" + EVENT_KEY$4,
    SHOWN: "shown" + EVENT_KEY$4,
    CLICK: "click" + EVENT_KEY$4,
    CLICK_DATA_API: "click" + EVENT_KEY$4 + DATA_API_KEY$4,
    KEYDOWN_DATA_API: "keydown" + EVENT_KEY$4 + DATA_API_KEY$4,
    KEYUP_DATA_API: "keyup" + EVENT_KEY$4 + DATA_API_KEY$4
  };
  var ClassName$4 = {
    DISABLED: 'disabled',
    SHOW: 'show',
    DROPUP: 'dropup',
    DROPRIGHT: 'dropright',
    DROPLEFT: 'dropleft',
    MENURIGHT: 'dropdown-menu-right',
    POSITION_STATIC: 'position-static'
  };
  var Selector$4 = {
    DATA_TOGGLE: '[data-toggle="dropdown"]',
    FORM_CHILD: '.dropdown form',
    MENU: '.dropdown-menu',
    NAVBAR_NAV: '.navbar-nav',
    VISIBLE_ITEMS: '.dropdown-menu .dropdown-item:not(.disabled):not(:disabled)'
  };
  var AttachmentMap = {
    TOP: 'top-start',
    TOPEND: 'top-end',
    BOTTOM: 'bottom-start',
    BOTTOMEND: 'bottom-end',
    RIGHT: 'right-start',
    RIGHTEND: 'right-end',
    LEFT: 'left-start',
    LEFTEND: 'left-end'
  };
  var Default$2 = {
    offset: 0,
    flip: true,
    boundary: 'scrollParent',
    reference: 'toggle',
    display: 'dynamic',
    popperConfig: null
  };
  var DefaultType$2 = {
    offset: '(number|string|function)',
    flip: 'boolean',
    boundary: '(string|element)',
    reference: '(string|element)',
    display: 'string',
    popperConfig: '(null|object)'
  };
  /**
   * ------------------------------------------------------------------------
   * Class Definition
   * ------------------------------------------------------------------------
   */

  var Dropdown =
  /*#__PURE__*/
  function () {
    function Dropdown(element, config) {
      this._element = element;
      this._popper = null;
      this._config = this._getConfig(config);
      this._menu = this._getMenuElement();
      this._inNavbar = this._detectNavbar();

      this._addEventListeners();

      Data.setData(element, DATA_KEY$4, this);
    } // Getters


    var _proto = Dropdown.prototype;

    // Public
    _proto.toggle = function toggle() {
      if (this._element.disabled || this._element.classList.contains(ClassName$4.DISABLED)) {
        return;
      }

      var isActive = this._menu.classList.contains(ClassName$4.SHOW);

      Dropdown.clearMenus();

      if (isActive) {
        return;
      }

      this.show();
    };

    _proto.show = function show() {
      if (this._element.disabled || this._element.classList.contains(ClassName$4.DISABLED) || this._menu.classList.contains(ClassName$4.SHOW)) {
        return;
      }

      var parent = Dropdown.getParentFromElement(this._element);
      var relatedTarget = {
        relatedTarget: this._element
      };
      var showEvent = EventHandler.trigger(parent, Event$5.SHOW, relatedTarget);

      if (showEvent.defaultPrevented) {
        return;
      } // Disable totally Popper.js for Dropdown in Navbar


      if (!this._inNavbar) {
        if (typeof Popper === 'undefined') {
          throw new TypeError('Bootstrap\'s dropdowns require Popper.js (https://popper.js.org)');
        }

        var referenceElement = this._element;

        if (this._config.reference === 'parent') {
          referenceElement = parent;
        } else if (isElement(this._config.reference)) {
          referenceElement = this._config.reference; // Check if it's jQuery element

          if (typeof this._config.reference.jquery !== 'undefined') {
            referenceElement = this._config.reference[0];
          }
        } // If boundary is not `scrollParent`, then set position to `static`
        // to allow the menu to "escape" the scroll parent's boundaries
        // https://github.com/twbs/bootstrap/issues/24251


        if (this._config.boundary !== 'scrollParent') {
          parent.classList.add(ClassName$4.POSITION_STATIC);
        }

        this._popper = new Popper(referenceElement, this._menu, this._getPopperConfig());
      } // If this is a touch-enabled device we add extra
      // empty mouseover listeners to the body's immediate children;
      // only needed because of broken event delegation on iOS
      // https://www.quirksmode.org/blog/archives/2014/02/mouse_event_bub.html


      if ('ontouchstart' in document.documentElement && !makeArray(SelectorEngine.closest(parent, Selector$4.NAVBAR_NAV)).length) {
        makeArray(document.body.children).forEach(function (elem) {
          return EventHandler.on(elem, 'mouseover', null, noop());
        });
      }

      this._element.focus();

      this._element.setAttribute('aria-expanded', true);

      Manipulator.toggleClass(this._menu, ClassName$4.SHOW);
      Manipulator.toggleClass(parent, ClassName$4.SHOW);
      EventHandler.trigger(parent, Event$5.SHOWN, relatedTarget);
    };

    _proto.hide = function hide() {
      if (this._element.disabled || this._element.classList.contains(ClassName$4.DISABLED) || !this._menu.classList.contains(ClassName$4.SHOW)) {
        return;
      }

      var parent = Dropdown.getParentFromElement(this._element);
      var relatedTarget = {
        relatedTarget: this._element
      };
      var hideEvent = EventHandler.trigger(parent, Event$5.HIDE, relatedTarget);

      if (hideEvent.defaultPrevented) {
        return;
      }

      if (this._popper) {
        this._popper.destroy();
      }

      Manipulator.toggleClass(this._menu, ClassName$4.SHOW);
      Manipulator.toggleClass(parent, ClassName$4.SHOW);
      EventHandler.trigger(parent, Event$5.HIDDEN, relatedTarget);
    };

    _proto.dispose = function dispose() {
      Data.removeData(this._element, DATA_KEY$4);
      EventHandler.off(this._element, EVENT_KEY$4);
      this._element = null;
      this._menu = null;

      if (this._popper) {
        this._popper.destroy();

        this._popper = null;
      }
    };

    _proto.update = function update() {
      this._inNavbar = this._detectNavbar();

      if (this._popper) {
        this._popper.scheduleUpdate();
      }
    } // Private
    ;

    _proto._addEventListeners = function _addEventListeners() {
      var _this = this;

      EventHandler.on(this._element, Event$5.CLICK, function (event) {
        event.preventDefault();
        event.stopPropagation();

        _this.toggle();
      });
    };

    _proto._getConfig = function _getConfig(config) {
      config = _objectSpread2({}, this.constructor.Default, {}, Manipulator.getDataAttributes(this._element), {}, config);
      typeCheckConfig(NAME$4, config, this.constructor.DefaultType);
      return config;
    };

    _proto._getMenuElement = function _getMenuElement() {
      var parent = Dropdown.getParentFromElement(this._element);
      return SelectorEngine.findOne(Selector$4.MENU, parent);
    };

    _proto._getPlacement = function _getPlacement() {
      var parentDropdown = this._element.parentNode;
      var placement = AttachmentMap.BOTTOM; // Handle dropup

      if (parentDropdown.classList.contains(ClassName$4.DROPUP)) {
        placement = AttachmentMap.TOP;

        if (this._menu.classList.contains(ClassName$4.MENURIGHT)) {
          placement = AttachmentMap.TOPEND;
        }
      } else if (parentDropdown.classList.contains(ClassName$4.DROPRIGHT)) {
        placement = AttachmentMap.RIGHT;
      } else if (parentDropdown.classList.contains(ClassName$4.DROPLEFT)) {
        placement = AttachmentMap.LEFT;
      } else if (this._menu.classList.contains(ClassName$4.MENURIGHT)) {
        placement = AttachmentMap.BOTTOMEND;
      }

      return placement;
    };

    _proto._detectNavbar = function _detectNavbar() {
      return Boolean(SelectorEngine.closest(this._element, '.navbar'));
    };

    _proto._getOffset = function _getOffset() {
      var _this2 = this;

      var offset = {};

      if (typeof this._config.offset === 'function') {
        offset.fn = function (data) {
          data.offsets = _objectSpread2({}, data.offsets, {}, _this2._config.offset(data.offsets, _this2._element) || {});
          return data;
        };
      } else {
        offset.offset = this._config.offset;
      }

      return offset;
    };

    _proto._getPopperConfig = function _getPopperConfig() {
      var popperConfig = {
        placement: this._getPlacement(),
        modifiers: {
          offset: this._getOffset(),
          flip: {
            enabled: this._config.flip
          },
          preventOverflow: {
            boundariesElement: this._config.boundary
          }
        }
      }; // Disable Popper.js if we have a static display

      if (this._config.display === 'static') {
        popperConfig.modifiers.applyStyle = {
          enabled: false
        };
      }

      return _objectSpread2({}, popperConfig, {}, this._config.popperConfig);
    } // Static
    ;

    Dropdown.dropdownInterface = function dropdownInterface(element, config) {
      var data = Data.getData(element, DATA_KEY$4);

      var _config = typeof config === 'object' ? config : null;

      if (!data) {
        data = new Dropdown(element, _config);
      }

      if (typeof config === 'string') {
        if (typeof data[config] === 'undefined') {
          throw new TypeError("No method named \"" + config + "\"");
        }

        data[config]();
      }
    };

    Dropdown.jQueryInterface = function jQueryInterface(config) {
      return this.each(function () {
        Dropdown.dropdownInterface(this, config);
      });
    };

    Dropdown.clearMenus = function clearMenus(event) {
      if (event && (event.which === RIGHT_MOUSE_BUTTON_WHICH || event.type === 'keyup' && event.which !== TAB_KEYCODE)) {
        return;
      }

      var toggles = makeArray(SelectorEngine.find(Selector$4.DATA_TOGGLE));

      for (var i = 0, len = toggles.length; i < len; i++) {
        var parent = Dropdown.getParentFromElement(toggles[i]);
        var context = Data.getData(toggles[i], DATA_KEY$4);
        var relatedTarget = {
          relatedTarget: toggles[i]
        };

        if (event && event.type === 'click') {
          relatedTarget.clickEvent = event;
        }

        if (!context) {
          continue;
        }

        var dropdownMenu = context._menu;

        if (!parent.classList.contains(ClassName$4.SHOW)) {
          continue;
        }

        if (event && (event.type === 'click' && /input|textarea/i.test(event.target.tagName) || event.type === 'keyup' && event.which === TAB_KEYCODE) && parent.contains(event.target)) {
          continue;
        }

        var hideEvent = EventHandler.trigger(parent, Event$5.HIDE, relatedTarget);

        if (hideEvent.defaultPrevented) {
          continue;
        } // If this is a touch-enabled device we remove the extra
        // empty mouseover listeners we added for iOS support


        if ('ontouchstart' in document.documentElement) {
          makeArray(document.body.children).forEach(function (elem) {
            return EventHandler.off(elem, 'mouseover', null, noop());
          });
        }

        toggles[i].setAttribute('aria-expanded', 'false');

        if (context._popper) {
          context._popper.destroy();
        }

        dropdownMenu.classList.remove(ClassName$4.SHOW);
        parent.classList.remove(ClassName$4.SHOW);
        EventHandler.trigger(parent, Event$5.HIDDEN, relatedTarget);
      }
    };

    Dropdown.getParentFromElement = function getParentFromElement(element) {
      return getElementFromSelector(element) || element.parentNode;
    };

    Dropdown.dataApiKeydownHandler = function dataApiKeydownHandler(event) {
      // If not input/textarea:
      //  - And not a key in REGEXP_KEYDOWN => not a dropdown command
      // If input/textarea:
      //  - If space key => not a dropdown command
      //  - If key is other than escape
      //    - If key is not up or down => not a dropdown command
      //    - If trigger inside the menu => not a dropdown command
      if (/input|textarea/i.test(event.target.tagName) ? event.which === SPACE_KEYCODE || event.which !== ESCAPE_KEYCODE && (event.which !== ARROW_DOWN_KEYCODE && event.which !== ARROW_UP_KEYCODE || SelectorEngine.closest(event.target, Selector$4.MENU)) : !REGEXP_KEYDOWN.test(event.which)) {
        return;
      }

      event.preventDefault();
      event.stopPropagation();

      if (this.disabled || this.classList.contains(ClassName$4.DISABLED)) {
        return;
      }

      var parent = Dropdown.getParentFromElement(this);
      var isActive = parent.classList.contains(ClassName$4.SHOW);

      if (!isActive || isActive && (event.which === ESCAPE_KEYCODE || event.which === SPACE_KEYCODE)) {
        if (event.which === ESCAPE_KEYCODE) {
          SelectorEngine.findOne(Selector$4.DATA_TOGGLE, parent).focus();
        }

        Dropdown.clearMenus();
        return;
      }

      var items = makeArray(SelectorEngine.find(Selector$4.VISIBLE_ITEMS, parent));

      if (!items.length) {
        return;
      }

      var index = items.indexOf(event.target);

      if (event.which === ARROW_UP_KEYCODE && index > 0) {
        // Up
        index--;
      }

      if (event.which === ARROW_DOWN_KEYCODE && index < items.length - 1) {
        // Down
        index++;
      }

      if (index < 0) {
        index = 0;
      }

      items[index].focus();
    };

    Dropdown.getInstance = function getInstance(element) {
      return Data.getData(element, DATA_KEY$4);
    };

    _createClass(Dropdown, null, [{
      key: "VERSION",
      get: function get() {
        return VERSION$4;
      }
    }, {
      key: "Default",
      get: function get() {
        return Default$2;
      }
    }, {
      key: "DefaultType",
      get: function get() {
        return DefaultType$2;
      }
    }]);

    return Dropdown;
  }();
  /**
   * ------------------------------------------------------------------------
   * Data Api implementation
   * ------------------------------------------------------------------------
   */


  EventHandler.on(document, Event$5.KEYDOWN_DATA_API, Selector$4.DATA_TOGGLE, Dropdown.dataApiKeydownHandler);
  EventHandler.on(document, Event$5.KEYDOWN_DATA_API, Selector$4.MENU, Dropdown.dataApiKeydownHandler);
  EventHandler.on(document, Event$5.CLICK_DATA_API, Dropdown.clearMenus);
  EventHandler.on(document, Event$5.KEYUP_DATA_API, Dropdown.clearMenus);
  EventHandler.on(document, Event$5.CLICK_DATA_API, Selector$4.DATA_TOGGLE, function (event) {
    event.preventDefault();
    event.stopPropagation();
    Dropdown.dropdownInterface(this, 'toggle');
  });
  EventHandler.on(document, Event$5.CLICK_DATA_API, Selector$4.FORM_CHILD, function (e) {
    return e.stopPropagation();
  });
  var $$5 = getjQuery();
  /**
   * ------------------------------------------------------------------------
   * jQuery
   * ------------------------------------------------------------------------
   * add .dropdown to jQuery only if jQuery is present
   */

  /* istanbul ignore if */

  if ($$5) {
    var JQUERY_NO_CONFLICT$4 = $$5.fn[NAME$4];
    $$5.fn[NAME$4] = Dropdown.jQueryInterface;
    $$5.fn[NAME$4].Constructor = Dropdown;

    $$5.fn[NAME$4].noConflict = function () {
      $$5.fn[NAME$4] = JQUERY_NO_CONFLICT$4;
      return Dropdown.jQueryInterface;
    };
  }

  /**
   * ------------------------------------------------------------------------
   * Constants
   * ------------------------------------------------------------------------
   */

  var NAME$5 = 'modal';
  var VERSION$5 = '4.3.1';
  var DATA_KEY$5 = 'bs.modal';
  var EVENT_KEY$5 = "." + DATA_KEY$5;
  var DATA_API_KEY$5 = '.data-api';
  var ESCAPE_KEYCODE$1 = 27; // KeyboardEvent.which value for Escape (Esc) key

  var Default$3 = {
    backdrop: true,
    keyboard: true,
    focus: true,
    show: true
  };
  var DefaultType$3 = {
    backdrop: '(boolean|string)',
    keyboard: 'boolean',
    focus: 'boolean',
    show: 'boolean'
  };
  var Event$6 = {
    HIDE: "hide" + EVENT_KEY$5,
    HIDDEN: "hidden" + EVENT_KEY$5,
    SHOW: "show" + EVENT_KEY$5,
    SHOWN: "shown" + EVENT_KEY$5,
    FOCUSIN: "focusin" + EVENT_KEY$5,
    RESIZE: "resize" + EVENT_KEY$5,
    CLICK_DISMISS: "click.dismiss" + EVENT_KEY$5,
    KEYDOWN_DISMISS: "keydown.dismiss" + EVENT_KEY$5,
    MOUSEUP_DISMISS: "mouseup.dismiss" + EVENT_KEY$5,
    MOUSEDOWN_DISMISS: "mousedown.dismiss" + EVENT_KEY$5,
    CLICK_DATA_API: "click" + EVENT_KEY$5 + DATA_API_KEY$5
  };
  var ClassName$5 = {
    SCROLLABLE: 'modal-dialog-scrollable',
    SCROLLBAR_MEASURER: 'modal-scrollbar-measure',
    BACKDROP: 'modal-backdrop',
    OPEN: 'modal-open',
    FADE: 'fade',
    SHOW: 'show'
  };
  var Selector$5 = {
    DIALOG: '.modal-dialog',
    MODAL_BODY: '.modal-body',
    DATA_TOGGLE: '[data-toggle="modal"]',
    DATA_DISMISS: '[data-dismiss="modal"]',
    FIXED_CONTENT: '.fixed-top, .fixed-bottom, .is-fixed, .sticky-top',
    STICKY_CONTENT: '.sticky-top'
  };
  /**
   * ------------------------------------------------------------------------
   * Class Definition
   * ------------------------------------------------------------------------
   */

  var Modal =
  /*#__PURE__*/
  function () {
    function Modal(element, config) {
      this._config = this._getConfig(config);
      this._element = element;
      this._dialog = SelectorEngine.findOne(Selector$5.DIALOG, element);
      this._backdrop = null;
      this._isShown = false;
      this._isBodyOverflowing = false;
      this._ignoreBackdropClick = false;
      this._isTransitioning = false;
      this._scrollbarWidth = 0;
      Data.setData(element, DATA_KEY$5, this);
    } // Getters


    var _proto = Modal.prototype;

    // Public
    _proto.toggle = function toggle(relatedTarget) {
      return this._isShown ? this.hide() : this.show(relatedTarget);
    };

    _proto.show = function show(relatedTarget) {
      var _this = this;

      if (this._isShown || this._isTransitioning) {
        return;
      }

      if (this._element.classList.contains(ClassName$5.FADE)) {
        this._isTransitioning = true;
      }

      var showEvent = EventHandler.trigger(this._element, Event$6.SHOW, {
        relatedTarget: relatedTarget
      });

      if (this._isShown || showEvent.defaultPrevented) {
        return;
      }

      this._isShown = true;

      this._checkScrollbar();

      this._setScrollbar();

      this._adjustDialog();

      this._setEscapeEvent();

      this._setResizeEvent();

      EventHandler.on(this._element, Event$6.CLICK_DISMISS, Selector$5.DATA_DISMISS, function (event) {
        return _this.hide(event);
      });
      EventHandler.on(this._dialog, Event$6.MOUSEDOWN_DISMISS, function () {
        EventHandler.one(_this._element, Event$6.MOUSEUP_DISMISS, function (event) {
          if (event.target === _this._element) {
            _this._ignoreBackdropClick = true;
          }
        });
      });

      this._showBackdrop(function () {
        return _this._showElement(relatedTarget);
      });
    };

    _proto.hide = function hide(event) {
      var _this2 = this;

      if (event) {
        event.preventDefault();
      }

      if (!this._isShown || this._isTransitioning) {
        return;
      }

      var hideEvent = EventHandler.trigger(this._element, Event$6.HIDE);

      if (hideEvent.defaultPrevented) {
        return;
      }

      this._isShown = false;

      var transition = this._element.classList.contains(ClassName$5.FADE);

      if (transition) {
        this._isTransitioning = true;
      }

      this._setEscapeEvent();

      this._setResizeEvent();

      EventHandler.off(document, Event$6.FOCUSIN);

      this._element.classList.remove(ClassName$5.SHOW);

      EventHandler.off(this._element, Event$6.CLICK_DISMISS);
      EventHandler.off(this._dialog, Event$6.MOUSEDOWN_DISMISS);

      if (transition) {
        var transitionDuration = getTransitionDurationFromElement(this._element);
        EventHandler.one(this._element, TRANSITION_END, function (event) {
          return _this2._hideModal(event);
        });
        emulateTransitionEnd(this._element, transitionDuration);
      } else {
        this._hideModal();
      }
    };

    _proto.dispose = function dispose() {
      [window, this._element, this._dialog].forEach(function (htmlElement) {
        return EventHandler.off(htmlElement, EVENT_KEY$5);
      });
      /**