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Editing: dropdown.js

/*!
  * Bootstrap dropdown.js v4.5.3 (https://getbootstrap.com/)
  * Copyright 2011-2020 The Bootstrap Authors (https://github.com/twbs/bootstrap/graphs/contributors)
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
  */
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory(require('jquery'), require('popper.js'), require('./util.js')) :
  typeof define === 'function' && define.amd ? define(['jquery', 'popper.js', './util.js'], factory) :
  (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.Dropdown = factory(global.jQuery, global.Popper, global.Util));
}(this, (function ($, Popper, Util) { 'use strict';

function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }

var $__default = /*#__PURE__*/_interopDefaultLegacy($);
  var Popper__default = /*#__PURE__*/_interopDefaultLegacy(Popper);
  var Util__default = /*#__PURE__*/_interopDefaultLegacy(Util);

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
  /**
   * ------------------------------------------------------------------------
   * Constants
   * ------------------------------------------------------------------------
   */

var NAME = 'dropdown';
  var VERSION = '4.5.3';
  var DATA_KEY = 'bs.dropdown';
  var EVENT_KEY = "." + DATA_KEY;
  var DATA_API_KEY = '.data-api';
  var JQUERY_NO_CONFLICT = $__default['default'].fn[NAME];
  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_HIDE = "hide" + EVENT_KEY;
  var EVENT_HIDDEN = "hidden" + EVENT_KEY;
  var EVENT_SHOW = "show" + EVENT_KEY;
  var EVENT_SHOWN = "shown" + EVENT_KEY;
  var EVENT_CLICK = "click" + EVENT_KEY;
  var EVENT_CLICK_DATA_API = "click" + EVENT_KEY + DATA_API_KEY;
  var EVENT_KEYDOWN_DATA_API = "keydown" + EVENT_KEY + DATA_API_KEY;
  var EVENT_KEYUP_DATA_API = "keyup" + EVENT_KEY + DATA_API_KEY;
  var CLASS_NAME_DISABLED = 'disabled';
  var CLASS_NAME_SHOW = '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_POSITION_STATIC = 'position-static';
  var SELECTOR_DATA_TOGGLE = '[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 = {
    offset: 0,
    flip: true,
    boundary: 'scrollParent',
    reference: 'toggle',
    display: 'dynamic',
    popperConfig: null
  };
  var DefaultType = {
    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();
    } // Getters

var _proto = Dropdown.prototype;

// Public
    _proto.toggle = function toggle() {
      if (this._element.disabled || $__default['default'](this._element).hasClass(CLASS_NAME_DISABLED)) {
        return;
      }

var isActive = $__default['default'](this._menu).hasClass(CLASS_NAME_SHOW);

Dropdown._clearMenus();

if (isActive) {
        return;
      }

this.show(true);
    };

_proto.show = function show(usePopper) {
      if (usePopper === void 0) {
        usePopper = false;
      }

if (this._element.disabled || $__default['default'](this._element).hasClass(CLASS_NAME_DISABLED) || $__default['default'](this._menu).hasClass(CLASS_NAME_SHOW)) {
        return;
      }

var relatedTarget = {
        relatedTarget: this._element
      };
      var showEvent = $__default['default'].Event(EVENT_SHOW, relatedTarget);

var parent = Dropdown._getParentFromElement(this._element);

$__default['default'](parent).trigger(showEvent);

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

if (!this._inNavbar && usePopper) {
        /**
         * Check for Popper dependency
         * Popper - https://popper.js.org
         */
        if (typeof Popper__default['default'] === '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 (Util__default['default'].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') {
          $__default['default'](parent).addClass(CLASS_NAME_POSITION_STATIC);
        }

this._popper = new Popper__default['default'](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 && $__default['default'](parent).closest(SELECTOR_NAVBAR_NAV).length === 0) {
        $__default['default'](document.body).children().on('mouseover', null, $__default['default'].noop);
      }

this._element.focus();

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

$__default['default'](this._menu).toggleClass(CLASS_NAME_SHOW);
      $__default['default'](parent).toggleClass(CLASS_NAME_SHOW).trigger($__default['default'].Event(EVENT_SHOWN, relatedTarget));
    };

_proto.hide = function hide() {
      if (this._element.disabled || $__default['default'](this._element).hasClass(CLASS_NAME_DISABLED) || !$__default['default'](this._menu).hasClass(CLASS_NAME_SHOW)) {
        return;
      }

var relatedTarget = {
        relatedTarget: this._element
      };
      var hideEvent = $__default['default'].Event(EVENT_HIDE, relatedTarget);

var parent = Dropdown._getParentFromElement(this._element);

$__default['default'](parent).trigger(hideEvent);

if (hideEvent.isDefaultPrevented()) {
        return;
      }

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

_proto.dispose = function dispose() {
      $__default['default'].removeData(this._element, DATA_KEY);
      $__default['default'](this._element).off(EVENT_KEY);
      this._element = null;
      this._menu = null;

if (this._popper !== null) {
        this._popper.destroy();

this._popper = null;
      }
    };

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

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

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

$__default['default'](this._element).on(EVENT_CLICK, function (event) {
        event.preventDefault();
        event.stopPropagation();

_this.toggle();
      });
    };

_proto._getConfig = function _getConfig(config) {
      config = _extends({}, this.constructor.Default, $__default['default'](this._element).data(), config);
      Util__default['default'].typeCheckConfig(NAME, config, this.constructor.DefaultType);
      return config;
    };

_proto._getMenuElement = function _getMenuElement() {
      if (!this._menu) {
        var parent = Dropdown._getParentFromElement(this._element);

if (parent) {
          this._menu = parent.querySelector(SELECTOR_MENU);
        }
      }

return this._menu;
    };

_proto._getPlacement = function _getPlacement() {
      var $parentDropdown = $__default['default'](this._element.parentNode);
      var placement = PLACEMENT_BOTTOM; // Handle dropup

if ($parentDropdown.hasClass(CLASS_NAME_DROPUP)) {
        placement = $__default['default'](this._menu).hasClass(CLASS_NAME_MENURIGHT) ? PLACEMENT_TOPEND : PLACEMENT_TOP;
      } else if ($parentDropdown.hasClass(CLASS_NAME_DROPRIGHT)) {
        placement = PLACEMENT_RIGHT;
      } else if ($parentDropdown.hasClass(CLASS_NAME_DROPLEFT)) {
        placement = PLACEMENT_LEFT;
      } else if ($__default['default'](this._menu).hasClass(CLASS_NAME_MENURIGHT)) {
        placement = PLACEMENT_BOTTOMEND;
      }

return placement;
    };

_proto._detectNavbar = function _detectNavbar() {
      return $__default['default'](this._element).closest('.navbar').length > 0;
    };

_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._jQueryInterface = function _jQueryInterface(config) {
      return this.each(function () {
        var data = $__default['default'](this).data(DATA_KEY);

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

if (!data) {
          data = new Dropdown(this, _config);
          $__default['default'](this).data(DATA_KEY, data);
        }

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

data[config]();
        }
      });
    };

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

var toggles = [].slice.call(document.querySelectorAll(SELECTOR_DATA_TOGGLE));

for (var i = 0, len = toggles.length; i < len; i++) {
        var parent = Dropdown._getParentFromElement(toggles[i]);

var context = $__default['default'](toggles[i]).data(DATA_KEY);
        var relatedTarget = {
          relatedTarget: toggles[i]
        };

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

if (!context) {
          continue;
        }

var dropdownMenu = context._menu;

if (!$__default['default'](parent).hasClass(CLASS_NAME_SHOW)) {
          continue;
        }

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

var hideEvent = $__default['default'].Event(EVENT_HIDE, relatedTarget);
        $__default['default'](parent).trigger(hideEvent);

if (hideEvent.isDefaultPrevented()) {
          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) {
          $__default['default'](document.body).children().off('mouseover', null, $__default['default'].noop);
        }

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

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

$__default['default'](dropdownMenu).removeClass(CLASS_NAME_SHOW);
        $__default['default'](parent).removeClass(CLASS_NAME_SHOW).trigger($__default['default'].Event(EVENT_HIDDEN, relatedTarget));
      }
    };

Dropdown._getParentFromElement = function _getParentFromElement(element) {
      var parent;
      var selector = Util__default['default'].getSelectorFromElement(element);

if (selector) {
        parent = document.querySelector(selector);
      }

return parent || element.parentNode;
    } // eslint-disable-next-line complexity
    ;

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 || $__default['default'](event.target).closest(SELECTOR_MENU).length) : !REGEXP_KEYDOWN.test(event.which)) {
        return;
      }

if (this.disabled || $__default['default'](this).hasClass(CLASS_NAME_DISABLED)) {
        return;
      }

var parent = Dropdown._getParentFromElement(this);

var isActive = $__default['default'](parent).hasClass(CLASS_NAME_SHOW);

if (!isActive && event.which === ESCAPE_KEYCODE) {
        return;
      }

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

if (!isActive || event.which === ESCAPE_KEYCODE || event.which === SPACE_KEYCODE) {
        if (event.which === ESCAPE_KEYCODE) {
          $__default['default'](parent.querySelector(SELECTOR_DATA_TOGGLE)).trigger('focus');
        }

$__default['default'](this).trigger('click');
        return;
      }

var items = [].slice.call(parent.querySelectorAll(SELECTOR_VISIBLE_ITEMS)).filter(function (item) {
        return $__default['default'](item).is(':visible');
      });

if (items.length === 0) {
        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();
    };

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

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

$__default['default'](document).on(EVENT_KEYDOWN_DATA_API, SELECTOR_DATA_TOGGLE, Dropdown._dataApiKeydownHandler).on(EVENT_KEYDOWN_DATA_API, SELECTOR_MENU, Dropdown._dataApiKeydownHandler).on(EVENT_CLICK_DATA_API + " " + EVENT_KEYUP_DATA_API, Dropdown._clearMenus).on(EVENT_CLICK_DATA_API, SELECTOR_DATA_TOGGLE, function (event) {
    event.preventDefault();
    event.stopPropagation();

Dropdown._jQueryInterface.call($__default['default'](this), 'toggle');
  }).on(EVENT_CLICK_DATA_API, SELECTOR_FORM_CHILD, function (e) {
    e.stopPropagation();
  });
  /**
   * ------------------------------------------------------------------------
   * jQuery
   * ------------------------------------------------------------------------
   */

$__default['default'].fn[NAME] = Dropdown._jQueryInterface;
  $__default['default'].fn[NAME].Constructor = Dropdown;

$__default['default'].fn[NAME].noConflict = function () {
    $__default['default'].fn[NAME] = JQUERY_NO_CONFLICT;
    return Dropdown._jQueryInterface;
  };

return Dropdown;

})));
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