bootstrap.esm.js

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


EventHandler.on(document, EVENT_CLICK_DATA_API$3, SELECTOR_DATA_TOGGLE$1, 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 = 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 = '5.0.0-alpha2';
var DATA_KEY$4 = 'bs.dropdown';
var EVENT_KEY$4 = "." + DATA_KEY$4;
var DATA_API_KEY$4 = '.data-api';
var ESCAPE_KEY = 'Escape';
var SPACE_KEY = 'Space';
var TAB_KEY = 'Tab';
var ARROW_UP_KEY = 'ArrowUp';
var ARROW_DOWN_KEY = 'ArrowDown';
var RIGHT_MOUSE_BUTTON = 2; // MouseEvent.button value for the secondary button, usually the right button

var REGEXP_KEYDOWN = new RegExp(ARROW_UP_KEY + "|" + ARROW_DOWN_KEY + "|" + ESCAPE_KEY);
var EVENT_HIDE$1 = "hide" + EVENT_KEY$4;
var EVENT_HIDDEN$1 = "hidden" + EVENT_KEY$4;
var EVENT_SHOW$1 = "show" + EVENT_KEY$4;
var EVENT_SHOWN$1 = "shown" + EVENT_KEY$4;
var EVENT_CLICK = "click" + EVENT_KEY$4;
var EVENT_CLICK_DATA_API$4 = "click" + EVENT_KEY$4 + DATA_API_KEY$4;
var EVENT_KEYDOWN_DATA_API = "keydown" + EVENT_KEY$4 + DATA_API_KEY$4;
var EVENT_KEYUP_DATA_API = "keyup" + EVENT_KEY$4 + DATA_API_KEY$4;
var CLASS_NAME_DISABLED = 'disabled';
var CLASS_NAME_SHOW$1 = 'show';
var CLASS_NAME_DROPUP = 'dropup';
var CLASS_NAME_DROPRIGHT = 'dropright';
var CLASS_NAME_DROPLEFT = 'dropleft';
var CLASS_NAME_MENURIGHT = 'dropdown-menu-right';
var CLASS_NAME_NAVBAR = 'navbar';
var CLASS_NAME_POSITION_STATIC = 'position-static';
var SELECTOR_DATA_TOGGLE$2 = '[data-toggle="dropdown"]';
var SELECTOR_FORM_CHILD = '.dropdown form';
var SELECTOR_MENU = '.dropdown-menu';
var SELECTOR_NAVBAR_NAV = '.navbar-nav';
var SELECTOR_VISIBLE_ITEMS = '.dropdown-menu .dropdown-item:not(.disabled):not(:disabled)';
var PLACEMENT_TOP = 'top-start';
var PLACEMENT_TOPEND = 'top-end';
var PLACEMENT_BOTTOM = 'bottom-start';
var PLACEMENT_BOTTOMEND = 'bottom-end';
var PLACEMENT_RIGHT = 'right-start';
var PLACEMENT_LEFT = 'left-start';
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(CLASS_NAME_DISABLED)) {
      return;
    }

    var isActive = this._element.classList.contains(CLASS_NAME_SHOW$1);

    Dropdown.clearMenus();

    if (isActive) {
      return;
    }

    this.show();
  };

  _proto.show = function show() {
    if (this._element.disabled || this._element.classList.contains(CLASS_NAME_DISABLED) || this._menu.classList.contains(CLASS_NAME_SHOW$1)) {
      return;
    }

    var parent = Dropdown.getParentFromElement(this._element);
    var relatedTarget = {
      relatedTarget: this._element
    };
    var showEvent = EventHandler.trigger(this._element, EVENT_SHOW$1, 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(CLASS_NAME_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 && !parent.closest(SELECTOR_NAVBAR_NAV)) {
      var _ref;

      (_ref = []).concat.apply(_ref, document.body.children).forEach(function (elem) {
        return EventHandler.on(elem, 'mouseover', null, noop());
      });
    }

    this._element.focus();

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

    this._menu.classList.toggle(CLASS_NAME_SHOW$1);

    this._element.classList.toggle(CLASS_NAME_SHOW$1);

    EventHandler.trigger(parent, EVENT_SHOWN$1, relatedTarget);
  };

  _proto.hide = function hide() {
    if (this._element.disabled || this._element.classList.contains(CLASS_NAME_DISABLED) || !this._menu.classList.contains(CLASS_NAME_SHOW$1)) {
      return;
    }

    var parent = Dropdown.getParentFromElement(this._element);
    var relatedTarget = {
      relatedTarget: this._element
    };
    var hideEvent = EventHandler.trigger(parent, EVENT_HIDE$1, relatedTarget);

    if (hideEvent.defaultPrevented) {
      return;
    }

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

    this._menu.classList.toggle(CLASS_NAME_SHOW$1);

    this._element.classList.toggle(CLASS_NAME_SHOW$1);

    EventHandler.trigger(parent, EVENT_HIDDEN$1, 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_CLICK, function (event) {
      event.preventDefault();
      event.stopPropagation();

      _this.toggle();
    });
  };

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

  _proto._getMenuElement = function _getMenuElement() {
    return SelectorEngine.next(this._element, SELECTOR_MENU)[0];
  };

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

    if (parentDropdown.classList.contains(CLASS_NAME_DROPUP)) {
      placement = PLACEMENT_TOP;

      if (this._menu.classList.contains(CLASS_NAME_MENURIGHT)) {
        placement = PLACEMENT_TOPEND;
      }
    } else if (parentDropdown.classList.contains(CLASS_NAME_DROPRIGHT)) {
      placement = PLACEMENT_RIGHT;
    } else if (parentDropdown.classList.contains(CLASS_NAME_DROPLEFT)) {
      placement = PLACEMENT_LEFT;
    } else if (this._menu.classList.contains(CLASS_NAME_MENURIGHT)) {
      placement = PLACEMENT_BOTTOMEND;
    }

    return placement;
  };

  _proto._detectNavbar = function _detectNavbar() {
    return Boolean(this._element.closest("." + CLASS_NAME_NAVBAR));
  };

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

    var offset = {};

    if (typeof this._config.offset === 'function') {
      offset.fn = function (data) {
        data.offsets = _extends({}, 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 _extends({}, 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.button === RIGHT_MOUSE_BUTTON || event.type === 'keyup' && event.key !== TAB_KEY)) {
      return;
    }

    var toggles = SelectorEngine.find(SELECTOR_DATA_TOGGLE$2);

    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 (!toggles[i].classList.contains(CLASS_NAME_SHOW$1)) {
        continue;
      }

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

      var hideEvent = EventHandler.trigger(parent, EVENT_HIDE$1, 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) {
        var _ref2;

        (_ref2 = []).concat.apply(_ref2, 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(CLASS_NAME_SHOW$1);
      toggles[i].classList.remove(CLASS_NAME_SHOW$1);
      EventHandler.trigger(parent, EVENT_HIDDEN$1, 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.key === SPACE_KEY || event.key !== ESCAPE_KEY && (event.key !== ARROW_DOWN_KEY && event.key !== ARROW_UP_KEY || event.target.closest(SELECTOR_MENU)) : !REGEXP_KEYDOWN.test(event.key)) {
      return;
    }

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

    if (this.disabled || this.classList.contains(CLASS_NAME_DISABLED)) {
      return;
    }

    var parent = Dropdown.getParentFromElement(this);
    var isActive = this.classList.contains(CLASS_NAME_SHOW$1);

    if (event.key === ESCAPE_KEY) {
      var button = this.matches(SELECTOR_DATA_TOGGLE$2) ? this : SelectorEngine.prev(this, SELECTOR_DATA_TOGGLE$2)[0];
      button.focus();
      Dropdown.clearMenus();
      return;
    }

    if (!isActive || event.key === SPACE_KEY) {
      Dropdown.clearMenus();
      return;
    }

    var items = SelectorEngine.find(SELECTOR_VISIBLE_ITEMS, parent).filter(isVisible);

    if (!items.length) {
      return;
    }

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

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

    if (event.key === ARROW_DOWN_KEY && index < items.length - 1) {
      // Down
      index++;
    } // index is -1 if the first keydown is an ArrowUp


    index = index === -1 ? 0 : index;
    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_KEYDOWN_DATA_API, SELECTOR_DATA_TOGGLE$2, Dropdown.dataApiKeydownHandler);
EventHandler.on(document, EVENT_KEYDOWN_DATA_API, SELECTOR_MENU, Dropdown.dataApiKeydownHandler);
EventHandler.on(document, EVENT_CLICK_DATA_API$4, Dropdown.clearMenus);
EventHandler.on(document, EVENT_KEYUP_DATA_API, Dropdown.clearMenus);
EventHandler.on(document, EVENT_CLICK_DATA_API$4, SELECTOR_DATA_TOGGLE$2, function (event) {
  event.preventDefault();
  event.stopPropagation();
  Dropdown.dropdownInterface(this, 'toggle');
});
EventHandler.on(document, EVENT_CLICK_DATA_API$4, SELECTOR_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 = '5.0.0-alpha2';
var DATA_KEY$5 = 'bs.modal';
var EVENT_KEY$5 = "." + DATA_KEY$5;
var DATA_API_KEY$5 = '.data-api';
var ESCAPE_KEY$1 = 'Escape';
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_HIDE$2 = "hide" + EVENT_KEY$5;
var EVENT_HIDE_PREVENTED = "hidePrevented" + EVENT_KEY$5;
var EVENT_HIDDEN$2 = "hidden" + EVENT_KEY$5;
var EVENT_SHOW$2 = "show" + EVENT_KEY$5;
var EVENT_SHOWN$2 = "shown" + EVENT_KEY$5;
var EVENT_FOCUSIN = "focusin" + EVENT_KEY$5;
var EVENT_RESIZE = "resize" + EVENT_KEY$5;
var EVENT_CLICK_DISMISS = "click.dismiss" + EVENT_KEY$5;
var EVENT_KEYDOWN_DISMISS = "keydown.dismiss" + EVENT_KEY$5;
var EVENT_MOUSEUP_DISMISS = "mouseup.dismiss" + EVENT_KEY$5;
var EVENT_MOUSEDOWN_DISMISS = "mousedown.dismiss" + EVENT_KEY$5;
var EVENT_CLICK_DATA_API$5 = "click" + EVENT_KEY$5 + DATA_API_KEY$5;
var CLASS_NAME_SCROLLBAR_MEASURER = 'modal-scrollbar-measure';
var CLASS_NAME_BACKDROP = 'modal-backdrop';
var CLASS_NAME_OPEN = 'modal-open';
var CLASS_NAME_FADE = 'fade';
var CLASS_NAME_SHOW$2 = 'show';
var CLASS_NAME_STATIC = 'modal-static';
var SELECTOR_DIALOG = '.modal-dialog';
var SELECTOR_MODAL_BODY = '.modal-body';
var SELECTOR_DATA_TOGGLE$3 = '[data-toggle="modal"]';
var SELECTOR_DATA_DISMISS = '[data-dismiss="modal"]';
var SELECTOR_FIXED_CONTENT = '.fixed-top, .fixed-bottom, .is-fixed, .sticky-top';
var SELECTOR_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_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(CLASS_NAME_FADE)) {
      this._isTransitioning = true;
    }

    var showEvent = EventHandler.trigger(this._element, EVENT_SHOW$2, {
      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_CLICK_DISMISS, SELECTOR_DATA_DISMISS, function (event) {
      return _this.hide(event);
    });
    EventHandler.on(this._dialog, EVENT_MOUSEDOWN_DISMISS, function () {
      EventHandler.one(_this._element, EVENT_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_HIDE$2);

    if (hideEvent.defaultPrevented) {
      return;
    }

    this._isShown = false;

    var transition = this._element.classList.contains(CLASS_NAME_FADE);

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

    this._setEscapeEvent();

    this._setResizeEvent();

    EventHandler.off(document, EVENT_FOCUSIN);

    this._element.classList.remove(CLASS_NAME_SHOW$2);

    EventHandler.off(this._element, EVENT_CLICK_DISMISS);
    EventHandler.off(this._dialog, EVENT_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);
    });
    /**
     * `document` has 2 events `EVENT_FOCUSIN` and `EVENT_CLICK_DATA_API`
     * Do not move `document` in `htmlElements` array
     * It will remove `EVENT_CLICK_DATA_API` event that should remain
     */

    EventHandler.off(document, EVENT_FOCUSIN);
    Data.removeData(this._element, DATA_KEY$5);
    this._config = null;
    this._element = null;
    this._dialog = null;
    this._backdrop = null;
    this._isShown = null;
    this._isBodyOverflowing = null;
    this._ignoreBackdropClick = null;
    this._isTransitioning = null;
    this._scrollbarWidth = null;
  };

  _proto.handleUpdate = function handleUpdate() {
    this._adjustDialog();
  } // Private
  ;

  _proto._getConfig = function _getConfig(config) {
    config = _extends({}, Default$3, config);
    typeCheckConfig(NAME$5, config, DefaultType$3);
    return config;
  };

  _proto._showElement = function _showElement(relatedTarget) {
    var _this3 = this;

    var transition = this._element.classList.contains(CLASS_NAME_FADE);

    var modalBody = SelectorEngine.findOne(SELECTOR_MODAL_BODY, this._dialog);

    if (!this._element.parentNode || this._element.parentNode.nodeType !== Node.ELEMENT_NODE) {
      // Don't move modal's DOM position
      document.body.appendChild(this._element);
    }

    this._element.style.display = 'block';

    this._element.removeAttribute('aria-hidden');

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

    this._element.setAttribute('role', 'dialog');

    this._element.scrollTop = 0;

    if (modalBody) {
      modalBody.scrollTop = 0;
    }

    if (transition) {
      reflow(this._element);
    }

    this._element.classList.add(CLASS_NAME_SHOW$2);

    if (this._config.focus) {
      this._enforceFocus();
    }

    var transitionComplete = function transitionComplete() {
      if (_this3._config.focus) {
        _this3._element.focus();
      }

      _this3._isTransitioning = false;
      EventHandler.trigger(_this3._element, EVENT_SHOWN$2, {
        relatedTarget: relatedTarget
      });
    };

    if (transition) {
      var transitionDuration = getTransitionDurationFromElement(this._dialog);
      EventHandler.one(this._dialog, TRANSITION_END, transitionComplete);
      emulateTransitionEnd(this._dialog, transitionDuration);
    } else {
      transitionComplete();
    }
  };

  _proto._enforceFocus = function _enforceFocus() {
    var _this4 = this;

    EventHandler.off(document, EVENT_FOCUSIN); // guard against infinite focus loop

    EventHandler.on(document, EVENT_FOCUSIN, function (event) {
      if (document !== event.target && _this4._element !== event.target && !_this4._element.contains(event.target)) {
        _this4._element.focus();
      }
    });
  };

  _proto._setEscapeEvent = function _setEscapeEvent() {
    var _this5 = this;

    if (this._isShown) {
      EventHandler.on(this._element, EVENT_KEYDOWN_DISMISS, function (event) {
        if (_this5._config.keyboard && event.key === ESCAPE_KEY$1) {
          event.preventDefault();

          _this5.hide();
        } else if (!_this5._config.keyboard && event.key === ESCAPE_KEY$1) {
          _this5._triggerBackdropTransition();
        }
      });
    } else {
      EventHandler.off(this._element, EVENT_KEYDOWN_DISMISS);
    }
  };

  _proto._setResizeEvent = function _setResizeEvent() {
    var _this6 = this;

    if (this._isShown) {
      EventHandler.on(window, EVENT_RESIZE, function () {
        return _this6._adjustDialog();
      });
    } else {
      EventHandler.off(window, EVENT_RESIZE);
    }
  };

  _proto._hideModal = function _hideModal() {
    var _this7 = this;

    this._element.style.display = 'none';

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

    this._element.removeAttribute('aria-modal');

    this._element.removeAttribute('role');

    this._isTransitioning = false;

    this._showBackdrop(function () {
      document.body.classList.remove(CLASS_NAME_OPEN);

      _this7._resetAdjustments();

      _this7._resetScrollbar();

      EventHandler.trigger(_this7._element, EVENT_HIDDEN$2);
    });
  };

  _proto._removeBackdrop = function _removeBackdrop() {
    this._backdrop.parentNode.removeChild(this._backdrop);

    this._backdrop = null;
  };

  _proto._showBackdrop = function _showBackdrop(callback) {
    var _this8 = this;

    var animate = this._element.classList.contains(CLASS_NAME_FADE) ? CLASS_NAME_FADE : '';

    if (this._isShown && this._config.backdrop) {
      this._backdrop = document.createElement('div');
      this._backdrop.className = CLASS_NAME_BACKDROP;

      if (animate) {
        this._backdrop.classList.add(animate);
      }

      document.body.appendChild(this._backdrop);
      EventHandler.on(this._element, EVENT_CLICK_DISMISS, function (event) {
        if (_this8._ignoreBackdropClick) {
          _this8._ignoreBackdropClick = false;
          return;
        }

        if (event.target !== event.currentTarget) {
          return;
        }

        _this8._triggerBackdropTransition();
      });

      if (animate) {
        reflow(this._backdrop);
      }

      this._backdrop.classList.add(CLASS_NAME_SHOW$2);

      if (!animate) {
        callback();
        return;
      }

      var backdropTransitionDuration = getTransitionDurationFromElement(this._backdrop);
      EventHandler.one(this._backdrop, TRANSITION_END, callback);
      emulateTransitionEnd(this._backdrop, backdropTransitionDuration);
    } else if (!this._isShown && this._backdrop) {
      this._backdrop.classList.remove(CLASS_NAME_SHOW$2);

      var callbackRemove = function callbackRemove() {
        _this8._removeBackdrop();

        callback();
      };

      if (this._element.classList.contains(CLASS_NAME_FADE)) {
        var _backdropTransitionDuration = getTransitionDurationFromElement(this._backdrop);

        EventHandler.one(this._backdrop, TRANSITION_END, callbackRemove);
        emulateTransitionEnd(this._backdrop, _backdropTransitionDuration);
      } else {
        callbackRemove();
      }
    } else {
      callback();
    }
  };

  _proto._triggerBackdropTransition = function _triggerBackdropTransition() {
    var _this9 = this;

    if (this._config.backdrop === 'static') {
      var hideEvent = EventHandler.trigger(this._element, EVENT_HIDE_PREVENTED);

      if (hideEvent.defaultPrevented) {
        return;
      }

      var isModalOverflowing = this._element.scrollHeight > document.documentElement.clientHeight;

      if (!isModalOverflowing) {
        this._element.style.overflowY = 'hidden';
      }

      this._element.classList.add(CLASS_NAME_STATIC);

      var modalTransitionDuration = getTransitionDurationFromElement(this._dialog);
      EventHandler.off(this._element, TRANSITION_END);
      EventHandler.one(this._element, TRANSITION_END, function () {
        _this9._element.classList.remove(CLASS_NAME_STATIC);

        if (!isModalOverflowing) {
          EventHandler.one(_this9._element, TRANSITION_END, function () {
            _this9._element.style.overflowY = '';
          });
          emulateTransitionEnd(_this9._element, modalTransitionDuration);
        }
      });
      emulateTransitionEnd(this._element, modalTransitionDuration);

      this._element.focus();
    } else {
      this.hide();
    }
  } // ----------------------------------------------------------------------
  // the following methods are used to handle overflowing modals