Difference between revisions of "Template:NAU-CHINA/header"

import $ from 'jquery' import Popper from 'popper.js' import Util from './util' /** * -------------------------------------------------------------------------- * Bootstrap (v4.1.3): dropdown.js * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE) * -------------------------------------------------------------------------- */ const Dropdown = (($) => { /** * ------------------------------------------------------------------------ * Constants * ------------------------------------------------------------------------ */ const NAME = 'dropdown' const VERSION = '4.1.3' const DATA_KEY = 'bs.dropdown' const EVENT_KEY = `.${DATA_KEY}` const DATA_API_KEY = '.data-api' const JQUERY_NO_CONFLICT = $.fn[NAME] const ESCAPE_KEYCODE = 27 // KeyboardEvent.which value for Escape (Esc) key const SPACE_KEYCODE = 32 // KeyboardEvent.which value for space key const TAB_KEYCODE = 9 // KeyboardEvent.which value for tab key const ARROW_UP_KEYCODE = 38 // KeyboardEvent.which value for up arrow key const ARROW_DOWN_KEYCODE = 40 // KeyboardEvent.which value for down arrow key const RIGHT_MOUSE_BUTTON_WHICH = 3 // MouseEvent.which value for the right button (assuming a right-handed mouse) const REGEXP_KEYDOWN = new RegExp(`${ARROW_UP_KEYCODE}|${ARROW_DOWN_KEYCODE}|${ESCAPE_KEYCODE}`) const Event = { HIDE : `hide${EVENT_KEY}`, HIDDEN : `hidden${EVENT_KEY}`, SHOW : `show${EVENT_KEY}`, SHOWN : `shown${EVENT_KEY}`, CLICK : `click${EVENT_KEY}`, CLICK_DATA_API : `click${EVENT_KEY}${DATA_API_KEY}`, KEYDOWN_DATA_API : `keydown${EVENT_KEY}${DATA_API_KEY}`, KEYUP_DATA_API : `keyup${EVENT_KEY}${DATA_API_KEY}` } const ClassName = { DISABLED : 'disabled', SHOW : 'show', DROPUP : 'dropup', DROPRIGHT : 'dropright', DROPLEFT : 'dropleft', MENURIGHT : 'dropdown-menu-right', MENULEFT : 'dropdown-menu-left', POSITION_STATIC : 'position-static' } const Selector = { 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)' } const 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' } const Default = { offset : 0, flip : true, boundary : 'scrollParent', reference : 'toggle', display : 'dynamic' } const DefaultType = { offset : '(number|string|function)', flip : 'boolean', boundary : '(string|element)', reference : '(string|element)', display : 'string' } /** * ------------------------------------------------------------------------ * Class Definition * ------------------------------------------------------------------------ */ class Dropdown { constructor(element, config) { this._element = element this._popper = null this._config = this._getConfig(config) this._menu = this._getMenuElement() this._inNavbar = this._detectNavbar() this._addEventListeners() } // Getters static get VERSION() { return VERSION } static get Default() { return Default } static get DefaultType() { return DefaultType } // Public toggle() { if (this._element.disabled || $(this._element).hasClass(ClassName.DISABLED)) { return } const parent = Dropdown._getParentFromElement(this._element) const isActive = $(this._menu).hasClass(ClassName.SHOW) Dropdown._clearMenus() if (isActive) { return } const relatedTarget = { relatedTarget: this._element } const showEvent = $.Event(Event.SHOW, relatedTarget) $(parent).trigger(showEvent) if (showEvent.isDefaultPrevented()) { return } // Disable totally Popper.js for Dropdown in Navbar if (!this._inNavbar) { /** * Check for Popper dependency * Popper - https://popper.js.org */ if (typeof Popper === 'undefined') { throw new TypeError('Bootstrap dropdown require Popper.js (https://popper.js.org)') } let referenceElement = this._element if (this._config.reference === 'parent') { referenceElement = parent } else if (Util.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).addClass(ClassName.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).length === 0) { $(document.body).children().on('mouseover', null, $.noop) } this._element.focus() this._element.setAttribute('aria-expanded', true) $(this._menu).toggleClass(ClassName.SHOW) $(parent) .toggleClass(ClassName.SHOW) .trigger($.Event(Event.SHOWN, relatedTarget)) } dispose() { $.removeData(this._element, DATA_KEY) $(this._element).off(EVENT_KEY) this._element = null this._menu = null if (this._popper !== null) { this._popper.destroy() this._popper = null } } update() { this._inNavbar = this._detectNavbar() if (this._popper !== null) { this._popper.scheduleUpdate() } } // Private _addEventListeners() { $(this._element).on(Event.CLICK, (event) => { event.preventDefault() event.stopPropagation() this.toggle() }) } _getConfig(config) { config = { ...this.constructor.Default, ...$(this._element).data(), ...config } Util.typeCheckConfig( NAME, config, this.constructor.DefaultType ) return config } _getMenuElement() { if (!this._menu) { const parent = Dropdown._getParentFromElement(this._element) if (parent) { this._menu = parent.querySelector(Selector.MENU) } } return this._menu } _getPlacement() { const $parentDropdown = $(this._element.parentNode) let placement = AttachmentMap.BOTTOM // Handle dropup if ($parentDropdown.hasClass(ClassName.DROPUP)) { placement = AttachmentMap.TOP if ($(this._menu).hasClass(ClassName.MENURIGHT)) { placement = AttachmentMap.TOPEND } } else if ($parentDropdown.hasClass(ClassName.DROPRIGHT)) { placement = AttachmentMap.RIGHT } else if ($parentDropdown.hasClass(ClassName.DROPLEFT)) { placement = AttachmentMap.LEFT } else if ($(this._menu).hasClass(ClassName.MENURIGHT)) { placement = AttachmentMap.BOTTOMEND } return placement } _detectNavbar() { return $(this._element).closest('.navbar').length > 0 } _getPopperConfig() { const offsetConf = {} if (typeof this._config.offset === 'function') { offsetConf.fn = (data) => { data.offsets = { ...data.offsets, ...this._config.offset(data.offsets) || {} } return data } } else { offsetConf.offset = this._config.offset } const popperConfig = { placement: this._getPlacement(), modifiers: { offset: offsetConf, 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 popperConfig } // Static static _jQueryInterface(config) { return this.each(function () { let data = $(this).data(DATA_KEY) const _config = typeof config === 'object' ? config : null if (!data) { data = new Dropdown(this, _config) $(this).data(DATA_KEY, data) } if (typeof config === 'string') { if (typeof data[config] === 'undefined') { throw new TypeError(`No method named "${config}"`) } data[config]() } }) } static _clearMenus(event) { if (event && (event.which === RIGHT_MOUSE_BUTTON_WHICH || event.type === 'keyup' && event.which !== TAB_KEYCODE)) { return } const toggles = [].slice.call(document.querySelectorAll(Selector.DATA_TOGGLE)) for (let i = 0, len = toggles.length; i < len; i++) { const parent = Dropdown._getParentFromElement(toggles[i]) const context = $(toggles[i]).data(DATA_KEY) const relatedTarget = { relatedTarget: toggles[i] } if (event && event.type === 'click') { relatedTarget.clickEvent = event } if (!context) { continue } const dropdownMenu = context._menu if (!$(parent).hasClass(ClassName.SHOW)) { continue } if (event && (event.type === 'click' && /input|textarea/i.test(event.target.tagName) || event.type === 'keyup' && event.which === TAB_KEYCODE) && $.contains(parent, event.target)) { continue } const hideEvent = $.Event(Event.HIDE, relatedTarget) $(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) { $(document.body).children().off('mouseover', null, $.noop) } toggles[i].setAttribute('aria-expanded', 'false') $(dropdownMenu).removeClass(ClassName.SHOW) $(parent) .removeClass(ClassName.SHOW) .trigger($.Event(Event.HIDDEN, relatedTarget)) } } static _getParentFromElement(element) { let parent const selector = Util.getSelectorFromElement(element) if (selector) { parent = document.querySelector(selector) } return parent || element.parentNode } // eslint-disable-next-line complexity static _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 || $(event.target).closest(Selector.MENU).length) : !REGEXP_KEYDOWN.test(event.which)) { return } event.preventDefault() event.stopPropagation() if (this.disabled || $(this).hasClass(ClassName.DISABLED)) { return } const parent = Dropdown._getParentFromElement(this) const isActive = $(parent).hasClass(ClassName.SHOW) if (!isActive && (event.which !== ESCAPE_KEYCODE || event.which !== SPACE_KEYCODE) || isActive && (event.which === ESCAPE_KEYCODE || event.which === SPACE_KEYCODE)) { if (event.which === ESCAPE_KEYCODE) { const toggle = parent.querySelector(Selector.DATA_TOGGLE) $(toggle).trigger('focus') } $(this).trigger('click') return } const items = [].slice.call(parent.querySelectorAll(Selector.VISIBLE_ITEMS)) if (items.length === 0) { return } let 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() } } /** * ------------------------------------------------------------------------ * Data Api implementation * ------------------------------------------------------------------------ */ $(document) .on(Event.KEYDOWN_DATA_API, Selector.DATA_TOGGLE, Dropdown._dataApiKeydownHandler) .on(Event.KEYDOWN_DATA_API, Selector.MENU, Dropdown._dataApiKeydownHandler) .on(`${Event.CLICK_DATA_API} ${Event.KEYUP_DATA_API}`, Dropdown._clearMenus) .on(Event.CLICK_DATA_API, Selector.DATA_TOGGLE, function (event) { event.preventDefault() event.stopPropagation() Dropdown._jQueryInterface.call($(this), 'toggle') }) .on(Event.CLICK_DATA_API, Selector.FORM_CHILD, (e) => { e.stopPropagation() }) /** * ------------------------------------------------------------------------ * jQuery * ------------------------------------------------------------------------ */ $.fn[NAME] = Dropdown._jQueryInterface $.fn[NAME].Constructor = Dropdown $.fn[NAME].noConflict = function () { $.fn[NAME] = JQUERY_NO_CONFLICT return Dropdown._jQueryInterface } return Dropdown })($, Popper) export default Dropdown