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* --------------------------------------------------------------------------\n * Bootstrap (v4.5.0): dropdown.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)\n * --------------------------------------------------------------------------\n */\n\nimport $ from 'jquery'\nimport Popper from 'core/popper'\nimport Util from './util'\n\n/**\n * ------------------------------------------------------------------------\n * Constants\n * ------------------------------------------------------------------------\n */\n\nconst NAME = 'dropdown'\nconst VERSION = '4.5.0'\nconst DATA_KEY = 'bs.dropdown'\nconst EVENT_KEY = `.${DATA_KEY}`\nconst DATA_API_KEY = '.data-api'\nconst JQUERY_NO_CONFLICT = $.fn[NAME]\nconst ESCAPE_KEYCODE = 27 // KeyboardEvent.which value for Escape (Esc) key\nconst SPACE_KEYCODE = 32 // KeyboardEvent.which value for space key\nconst TAB_KEYCODE = 9 // KeyboardEvent.which value for tab key\nconst ARROW_UP_KEYCODE = 38 // KeyboardEvent.which value for up arrow key\nconst ARROW_DOWN_KEYCODE = 40 // KeyboardEvent.which value for down arrow key\nconst RIGHT_MOUSE_BUTTON_WHICH = 3 // MouseEvent.which value for the right button (assuming a right-handed mouse)\nconst REGEXP_KEYDOWN = new RegExp(`${ARROW_UP_KEYCODE}|${ARROW_DOWN_KEYCODE}|${ESCAPE_KEYCODE}`)\n\nconst EVENT_HIDE = `hide${EVENT_KEY}`\nconst EVENT_HIDDEN = `hidden${EVENT_KEY}`\nconst EVENT_SHOW = `show${EVENT_KEY}`\nconst EVENT_SHOWN = `shown${EVENT_KEY}`\nconst EVENT_CLICK = `click${EVENT_KEY}`\nconst EVENT_CLICK_DATA_API = `click${EVENT_KEY}${DATA_API_KEY}`\nconst EVENT_KEYDOWN_DATA_API = `keydown${EVENT_KEY}${DATA_API_KEY}`\nconst EVENT_KEYUP_DATA_API = `keyup${EVENT_KEY}${DATA_API_KEY}`\n\nconst CLASS_NAME_DISABLED = 'disabled'\nconst CLASS_NAME_SHOW = 'show'\nconst CLASS_NAME_DROPUP = 'dropup'\nconst CLASS_NAME_DROPRIGHT = 'dropright'\nconst CLASS_NAME_DROPLEFT = 'dropleft'\nconst CLASS_NAME_MENURIGHT = 'dropdown-menu-right'\nconst CLASS_NAME_POSITION_STATIC = 'position-static'\n\nconst SELECTOR_DATA_TOGGLE = '[data-toggle=\"dropdown\"]'\nconst SELECTOR_FORM_CHILD = '.dropdown form'\nconst SELECTOR_MENU = '.dropdown-menu'\nconst SELECTOR_NAVBAR_NAV = '.navbar-nav'\nconst SELECTOR_VISIBLE_ITEMS = '.dropdown-menu .dropdown-item:not(.disabled):not(:disabled)'\n\nconst PLACEMENT_TOP = 'top-start'\nconst PLACEMENT_TOPEND = 'top-end'\nconst PLACEMENT_BOTTOM = 'bottom-start'\nconst PLACEMENT_BOTTOMEND = 'bottom-end'\nconst PLACEMENT_RIGHT = 'right-start'\nconst PLACEMENT_LEFT = 'left-start'\n\nconst Default = {\n offset : 0,\n flip : true,\n boundary : 'scrollParent',\n reference : 'toggle',\n display : 'dynamic',\n popperConfig : null\n}\n\nconst DefaultType = {\n offset : '(number|string|function)',\n flip : 'boolean',\n boundary : '(string|element)',\n reference : '(string|element)',\n display : 'string',\n popperConfig : '(null|object)'\n}\n\n/**\n * ------------------------------------------------------------------------\n * Class Definition\n * ------------------------------------------------------------------------\n */\n\nclass Dropdown {\n constructor(element, config) {\n this._element = element\n this._popper = null\n this._config = this._getConfig(config)\n this._menu = this._getMenuElement()\n this._inNavbar = this._detectNavbar()\n\n this._addEventListeners()\n }\n\n // Getters\n\n static get VERSION() {\n return VERSION\n }\n\n static get Default() {\n return Default\n }\n\n static get DefaultType() {\n return DefaultType\n }\n\n // Public\n\n toggle() {\n if (this._element.disabled || $(this._element).hasClass(CLASS_NAME_DISABLED)) {\n return\n }\n\n const isActive = $(this._menu).hasClass(CLASS_NAME_SHOW)\n\n Dropdown._clearMenus()\n\n if (isActive) {\n return\n }\n\n this.show(true)\n }\n\n show(usePopper = false) {\n if (this._element.disabled || $(this._element).hasClass(CLASS_NAME_DISABLED) || $(this._menu).hasClass(CLASS_NAME_SHOW)) {\n return\n }\n\n const relatedTarget = {\n relatedTarget: this._element\n }\n const showEvent = $.Event(EVENT_SHOW, relatedTarget)\n const parent = Dropdown._getParentFromElement(this._element)\n\n $(parent).trigger(showEvent)\n\n if (showEvent.isDefaultPrevented()) {\n return\n }\n\n // Disable totally Popper.js for Dropdown in Navbar\n if (!this._inNavbar && usePopper) {\n /**\n * Check for Popper dependency\n * Popper - https://popper.js.org\n */\n if (typeof Popper === 'undefined') {\n throw new TypeError('Bootstrap\\'s dropdowns require Popper.js (https://popper.js.org/)')\n }\n\n let referenceElement = this._element\n\n if (this._config.reference === 'parent') {\n referenceElement = parent\n } else if (Util.isElement(this._config.reference)) {\n referenceElement = this._config.reference\n\n // Check if it's jQuery element\n if (typeof this._config.reference.jquery !== 'undefined') {\n referenceElement = this._config.reference[0]\n }\n }\n\n // If boundary is not `scrollParent`, then set position to `static`\n // to allow the menu to \"escape\" the scroll parent's boundaries\n // https://github.com/twbs/bootstrap/issues/24251\n if (this._config.boundary !== 'scrollParent') {\n $(parent).addClass(CLASS_NAME_POSITION_STATIC)\n }\n this._popper = new Popper(referenceElement, this._menu, this._getPopperConfig())\n }\n\n // If this is a touch-enabled device we add extra\n // empty mouseover listeners to the body's immediate children;\n // only needed because of broken event delegation on iOS\n // https://www.quirksmode.org/blog/archives/2014/02/mouse_event_bub.html\n if ('ontouchstart' in document.documentElement &&\n $(parent).closest(SELECTOR_NAVBAR_NAV).length === 0) {\n $(document.body).children().on('mouseover', null, $.noop)\n }\n\n this._element.focus()\n this._element.setAttribute('aria-expanded', true)\n\n $(this._menu).toggleClass(CLASS_NAME_SHOW)\n $(parent)\n .toggleClass(CLASS_NAME_SHOW)\n .trigger($.Event(EVENT_SHOWN, relatedTarget))\n }\n\n hide() {\n if (this._element.disabled || $(this._element).hasClass(CLASS_NAME_DISABLED) || !$(this._menu).hasClass(CLASS_NAME_SHOW)) {\n return\n }\n\n const relatedTarget = {\n relatedTarget: this._element\n }\n const hideEvent = $.Event(EVENT_HIDE, relatedTarget)\n const parent = Dropdown._getParentFromElement(this._element)\n\n $(parent).trigger(hideEvent)\n\n if (hideEvent.isDefaultPrevented()) {\n return\n }\n\n if (this._popper) {\n this._popper.destroy()\n }\n\n $(this._menu).toggleClass(CLASS_NAME_SHOW)\n $(parent)\n .toggleClass(CLASS_NAME_SHOW)\n .trigger($.Event(EVENT_HIDDEN, relatedTarget))\n }\n\n dispose() {\n $.removeData(this._element, DATA_KEY)\n $(this._element).off(EVENT_KEY)\n this._element = null\n this._menu = null\n if (this._popper !== null) {\n this._popper.destroy()\n this._popper = null\n }\n }\n\n update() {\n this._inNavbar = this._detectNavbar()\n if (this._popper !== null) {\n this._popper.scheduleUpdate()\n }\n }\n\n // Private\n\n _addEventListeners() {\n $(this._element).on(EVENT_CLICK, (event) => {\n event.preventDefault()\n event.stopPropagation()\n this.toggle()\n })\n }\n\n _getConfig(config) {\n config = {\n ...this.constructor.Default,\n ...$(this._element).data(),\n ...config\n }\n\n Util.typeCheckConfig(\n NAME,\n config,\n this.constructor.DefaultType\n )\n\n return config\n }\n\n _getMenuElement() {\n if (!this._menu) {\n const parent = Dropdown._getParentFromElement(this._element)\n\n if (parent) {\n this._menu = parent.querySelector(SELECTOR_MENU)\n }\n }\n return this._menu\n }\n\n _getPlacement() {\n const $parentDropdown = $(this._element.parentNode)\n let placement = PLACEMENT_BOTTOM\n\n // Handle dropup\n if ($parentDropdown.hasClass(CLASS_NAME_DROPUP)) {\n placement = $(this._menu).hasClass(CLASS_NAME_MENURIGHT)\n ? PLACEMENT_TOPEND\n : PLACEMENT_TOP\n } else if ($parentDropdown.hasClass(CLASS_NAME_DROPRIGHT)) {\n placement = PLACEMENT_RIGHT\n } else if ($parentDropdown.hasClass(CLASS_NAME_DROPLEFT)) {\n placement = PLACEMENT_LEFT\n } else if ($(this._menu).hasClass(CLASS_NAME_MENURIGHT)) {\n placement = PLACEMENT_BOTTOMEND\n }\n return placement\n }\n\n _detectNavbar() {\n return $(this._element).closest('.navbar').length > 0\n }\n\n _getOffset() {\n const offset = {}\n\n if (typeof this._config.offset === 'function') {\n offset.fn = (data) => {\n data.offsets = {\n ...data.offsets,\n ...this._config.offset(data.offsets, this._element) || {}\n }\n\n return data\n }\n } else {\n offset.offset = this._config.offset\n }\n\n return offset\n }\n\n _getPopperConfig() {\n const popperConfig = {\n placement: this._getPlacement(),\n modifiers: {\n offset: this._getOffset(),\n flip: {\n enabled: this._config.flip\n },\n preventOverflow: {\n boundariesElement: this._config.boundary\n }\n }\n }\n\n // Disable Popper.js if we have a static display\n if (this._config.display === 'static') {\n popperConfig.modifiers.applyStyle = {\n enabled: false\n }\n }\n\n return {\n ...popperConfig,\n ...this._config.popperConfig\n }\n }\n\n // Static\n\n static _jQueryInterface(config) {\n return this.each(function () {\n let data = $(this).data(DATA_KEY)\n const _config = typeof config === 'object' ? config : null\n\n if (!data) {\n data = new Dropdown(this, _config)\n $(this).data(DATA_KEY, data)\n }\n\n if (typeof config === 'string') {\n if (typeof data[config] === 'undefined') {\n throw new TypeError(`No method named \"${config}\"`)\n }\n data[config]()\n }\n })\n }\n\n static _clearMenus(event) {\n if (event && (event.which === RIGHT_MOUSE_BUTTON_WHICH ||\n event.type === 'keyup' && event.which !== TAB_KEYCODE)) {\n return\n }\n\n const toggles = [].slice.call(document.querySelectorAll(SELECTOR_DATA_TOGGLE))\n\n for (let i = 0, len = toggles.length; i < len; i++) {\n const parent = Dropdown._getParentFromElement(toggles[i])\n const context = $(toggles[i]).data(DATA_KEY)\n const relatedTarget = {\n relatedTarget: toggles[i]\n }\n\n if (event && event.type === 'click') {\n relatedTarget.clickEvent = event\n }\n\n if (!context) {\n continue\n }\n\n const dropdownMenu = context._menu\n if (!$(parent).hasClass(CLASS_NAME_SHOW)) {\n continue\n }\n\n if (event && (event.type === 'click' &&\n /input|textarea/i.test(event.target.tagName) || event.type === 'keyup' && event.which === TAB_KEYCODE) &&\n $.contains(parent, event.target)) {\n continue\n }\n\n const hideEvent = $.Event(EVENT_HIDE, relatedTarget)\n $(parent).trigger(hideEvent)\n if (hideEvent.isDefaultPrevented()) {\n continue\n }\n\n // If this is a touch-enabled device we remove the extra\n // empty mouseover listeners we added for iOS support\n if ('ontouchstart' in document.documentElement) {\n $(document.body).children().off('mouseover', null, $.noop)\n }\n\n toggles[i].setAttribute('aria-expanded', 'false')\n\n if (context._popper) {\n context._popper.destroy()\n }\n\n $(dropdownMenu).removeClass(CLASS_NAME_SHOW)\n $(parent)\n .removeClass(CLASS_NAME_SHOW)\n .trigger($.Event(EVENT_HIDDEN, relatedTarget))\n }\n }\n\n static _getParentFromElement(element) {\n let parent\n const selector = Util.getSelectorFromElement(element)\n\n if (selector) {\n parent = document.querySelector(selector)\n }\n\n return parent || element.parentNode\n }\n\n // eslint-disable-next-line complexity\n static _dataApiKeydownHandler(event) {\n // If not input/textarea:\n // - And not a key in REGEXP_KEYDOWN => not a dropdown command\n // If input/textarea:\n // - If space key => not a dropdown command\n // - If key is other than escape\n // - If key is not up or down => not a dropdown command\n // - If trigger inside the menu => not a dropdown command\n if (/input|textarea/i.test(event.target.tagName)\n ? event.which === SPACE_KEYCODE || event.which !== ESCAPE_KEYCODE &&\n (event.which !== ARROW_DOWN_KEYCODE && event.which !== ARROW_UP_KEYCODE ||\n $(event.target).closest(SELECTOR_MENU).length) : !REGEXP_KEYDOWN.test(event.which)) {\n return\n }\n\n if (this.disabled || $(this).hasClass(CLASS_NAME_DISABLED)) {\n return\n }\n\n const parent = Dropdown._getParentFromElement(this)\n const isActive = $(parent).hasClass(CLASS_NAME_SHOW)\n\n if (!isActive && event.which === ESCAPE_KEYCODE) {\n return\n }\n\n event.preventDefault()\n event.stopPropagation()\n\n if (!isActive || isActive && (event.which === ESCAPE_KEYCODE || event.which === SPACE_KEYCODE)) {\n if (event.which === ESCAPE_KEYCODE) {\n $(parent.querySelector(SELECTOR_DATA_TOGGLE)).trigger('focus')\n }\n\n $(this).trigger('click')\n return\n }\n\n const items = [].slice.call(parent.querySelectorAll(SELECTOR_VISIBLE_ITEMS))\n .filter((item) => $(item).is(':visible'))\n\n if (items.length === 0) {\n return\n }\n\n let index = items.indexOf(event.target)\n\n if (event.which === ARROW_UP_KEYCODE && index > 0) { // Up\n index--\n }\n\n if (event.which === ARROW_DOWN_KEYCODE && index < items.length - 1) { // Down\n index++\n }\n\n if (index < 0) {\n index = 0\n }\n\n items[index].focus()\n }\n}\n\n/**\n * ------------------------------------------------------------------------\n * Data Api implementation\n * ------------------------------------------------------------------------\n */\n\n$(document)\n .on(EVENT_KEYDOWN_DATA_API, SELECTOR_DATA_TOGGLE, Dropdown._dataApiKeydownHandler)\n .on(EVENT_KEYDOWN_DATA_API, SELECTOR_MENU, Dropdown._dataApiKeydownHandler)\n .on(`${EVENT_CLICK_DATA_API} ${EVENT_KEYUP_DATA_API}`, Dropdown._clearMenus)\n .on(EVENT_CLICK_DATA_API, SELECTOR_DATA_TOGGLE, function (event) {\n event.preventDefault()\n event.stopPropagation()\n Dropdown._jQueryInterface.call($(this), 'toggle')\n })\n .on(EVENT_CLICK_DATA_API, SELECTOR_FORM_CHILD, (e) => {\n e.stopPropagation()\n })\n\n/**\n * ------------------------------------------------------------------------\n * jQuery\n * ------------------------------------------------------------------------\n */\n\n$.fn[NAME] = Dropdown._jQueryInterface\n$.fn[NAME].Constructor = Dropdown\n$.fn[NAME].noConflict = () => {\n $.fn[NAME] = JQUERY_NO_CONFLICT\n return Dropdown._jQueryInterface\n}\n\nexport default Dropdown\n"],"file":"dropdown.min.js"}