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/**
* --------------------------------------------------------------------------
* Bootstrap dropdown.js
* Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
* --------------------------------------------------------------------------
*/
import * as Popper from '@popperjs/core'
import BaseComponent from './base-component.js'
import EventHandler from './dom/event-handler.js'
import Manipulator from './dom/manipulator.js'
import SelectorEngine from './dom/selector-engine.js'
import {
defineJQueryPlugin,
execute,
getElement,
getNextActiveElement,
isDisabled,
isElement,
isRTL,
isVisible,
noop
} from './util/index.js'
/**
* Constants
*/
const NAME = 'dropdown'
const DATA_KEY = 'bs.dropdown'
const EVENT_KEY = `.${DATA_KEY}`
const DATA_API_KEY = '.data-api'
const ESCAPE_KEY = 'Escape'
const TAB_KEY = 'Tab'
const ARROW_UP_KEY = 'ArrowUp'
const ARROW_DOWN_KEY = 'ArrowDown'
const RIGHT_MOUSE_BUTTON = 2 // MouseEvent.button value for the secondary button, usually the right button
const EVENT_HIDE = `hide${EVENT_KEY}`
const EVENT_HIDDEN = `hidden${EVENT_KEY}`
const EVENT_SHOW = `show${EVENT_KEY}`
const EVENT_SHOWN = `shown${EVENT_KEY}`
const EVENT_CLICK_DATA_API = `click${EVENT_KEY}${DATA_API_KEY}`
const EVENT_KEYDOWN_DATA_API = `keydown${EVENT_KEY}${DATA_API_KEY}`
const EVENT_KEYUP_DATA_API = `keyup${EVENT_KEY}${DATA_API_KEY}`
const CLASS_NAME_SHOW = 'show'
const CLASS_NAME_DROPUP = 'dropup'
const CLASS_NAME_DROPEND = 'dropend'
const CLASS_NAME_DROPSTART = 'dropstart'
const CLASS_NAME_DROPUP_CENTER = 'dropup-center'
const CLASS_NAME_DROPDOWN_CENTER = 'dropdown-center'
const SELECTOR_DATA_TOGGLE = '[data-bs-toggle="dropdown"]:not(.disabled):not(:disabled)'
const SELECTOR_DATA_TOGGLE_SHOWN = `${SELECTOR_DATA_TOGGLE}.${CLASS_NAME_SHOW}`
const SELECTOR_MENU = '.dropdown-menu'
const SELECTOR_NAVBAR = '.navbar'
const SELECTOR_NAVBAR_NAV = '.navbar-nav'
const SELECTOR_VISIBLE_ITEMS = '.dropdown-menu .dropdown-item:not(.disabled):not(:disabled)'
const PLACEMENT_TOP = isRTL() ? 'top-end' : 'top-start'
const PLACEMENT_TOPEND = isRTL() ? 'top-start' : 'top-end'
const PLACEMENT_BOTTOM = isRTL() ? 'bottom-end' : 'bottom-start'
const PLACEMENT_BOTTOMEND = isRTL() ? 'bottom-start' : 'bottom-end'
const PLACEMENT_RIGHT = isRTL() ? 'left-start' : 'right-start'
const PLACEMENT_LEFT = isRTL() ? 'right-start' : 'left-start'
const PLACEMENT_TOPCENTER = 'top'
const PLACEMENT_BOTTOMCENTER = 'bottom'
const Default = {
autoClose: true,
boundary: 'clippingParents',
display: 'dynamic',
offset: [0, 2],
popperConfig: null,
reference: 'toggle'
}
const DefaultType = {
autoClose: '(boolean|string)',
boundary: '(string|element)',
display: 'string',
offset: '(array|string|function)',
popperConfig: '(null|object|function)',
reference: '(string|element|object)'
}
/**
* Class definition
*/
class Dropdown extends BaseComponent {
constructor(element, config) {
super(element, config)
this._popper = null
this._parent = this._element.parentNode // dropdown wrapper
// TODO: v6 revert #37011 & change markup https://getbootstrap.com/docs/5.3/forms/input-group/
this._menu = SelectorEngine.next(this._element, SELECTOR_MENU)[0] ||
SelectorEngine.prev(this._element, SELECTOR_MENU)[0] ||
SelectorEngine.findOne(SELECTOR_MENU, this._parent)
this._inNavbar = this._detectNavbar()
}
// Getters
static get Default() {
return Default
}
static get DefaultType() {
return DefaultType
}
static get NAME() {
return NAME
}
// Public
toggle() {
return this._isShown() ? this.hide() : this.show()
}
show() {
if (isDisabled(this._element) || this._isShown()) {
return
}
const relatedTarget = {
relatedTarget: this._element
}
const showEvent = EventHandler.trigger(this._element, EVENT_SHOW, relatedTarget)
if (showEvent.defaultPrevented) {
return
}
this._createPopper()
// 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 && !this._parent.closest(SELECTOR_NAVBAR_NAV)) {
for (const element of [].concat(...document.body.children)) {
EventHandler.on(element, 'mouseover', noop)
}
}
this._element.focus()
this._element.setAttribute('aria-expanded', true)
this._menu.classList.add(CLASS_NAME_SHOW)
this._element.classList.add(CLASS_NAME_SHOW)
EventHandler.trigger(this._element, EVENT_SHOWN, relatedTarget)
}
hide() {
if (isDisabled(this._element) || !this._isShown()) {
return
}
const relatedTarget = {
relatedTarget: this._element
}
this._completeHide(relatedTarget)
}
dispose() {
if (this._popper) {
this._popper.destroy()
}
super.dispose()
}
update() {
this._inNavbar = this._detectNavbar()
if (this._popper) {
this._popper.update()
}
}
// Private
_completeHide(relatedTarget) {
const hideEvent = EventHandler.trigger(this._element, EVENT_HIDE, relatedTarget)
if (hideEvent.defaultPrevented) {
return
}
// If this is a touch-enabled device we remove the extra
// empty mouseover listeners we added for iOS support
if ('ontouchstart' in document.documentElement) {
for (const element of [].concat(...document.body.children)) {
EventHandler.off(element, 'mouseover', noop)
}
}
if (this._popper) {
this._popper.destroy()
}
this._menu.classList.remove(CLASS_NAME_SHOW)
this._element.classList.remove(CLASS_NAME_SHOW)
this._element.setAttribute('aria-expanded', 'false')
Manipulator.removeDataAttribute(this._menu, 'popper')
EventHandler.trigger(this._element, EVENT_HIDDEN, relatedTarget)
}
_getConfig(config) {
config = super._getConfig(config)
if (typeof config.reference === 'object' && !isElement(config.reference) &&
typeof config.reference.getBoundingClientRect !== 'function'
) {
// Popper virtual elements require a getBoundingClientRect method
throw new TypeError(`${NAME.toUpperCase()}: Option "reference" provided type "object" without a required "getBoundingClientRect" method.`)
}
return config
}
_createPopper() {
if (typeof Popper === 'undefined') {
throw new TypeError('Bootstrap\'s dropdowns require Popper (https://popper.js.org/docs/v2/)')
}
let referenceElement = this._element
if (this._config.reference === 'parent') {
referenceElement = this._parent
} else if (isElement(this._config.reference)) {
referenceElement = getElement(this._config.reference)
} else if (typeof this._config.reference === 'object') {
referenceElement = this._config.reference
}
const popperConfig = this._getPopperConfig()
this._popper = Popper.createPopper(referenceElement, this._menu, popperConfig)
}
_isShown() {
return this._menu.classList.contains(CLASS_NAME_SHOW)
}
_getPlacement() {
const parentDropdown = this._parent
if (parentDropdown.classList.contains(CLASS_NAME_DROPEND)) {
return PLACEMENT_RIGHT
}
if (parentDropdown.classList.contains(CLASS_NAME_DROPSTART)) {
return PLACEMENT_LEFT
}
if (parentDropdown.classList.contains(CLASS_NAME_DROPUP_CENTER)) {
return PLACEMENT_TOPCENTER
}
if (parentDropdown.classList.contains(CLASS_NAME_DROPDOWN_CENTER)) {
return PLACEMENT_BOTTOMCENTER
}
// We need to trim the value because custom properties can also include spaces
const isEnd = getComputedStyle(this._menu).getPropertyValue('--bs-position').trim() === 'end'
if (parentDropdown.classList.contains(CLASS_NAME_DROPUP)) {
return isEnd ? PLACEMENT_TOPEND : PLACEMENT_TOP
}
return isEnd ? PLACEMENT_BOTTOMEND : PLACEMENT_BOTTOM
}
_detectNavbar() {
return this._element.closest(SELECTOR_NAVBAR) !== null
}
_getOffset() {
const { offset } = this._config
if (typeof offset === 'string') {
return offset.split(',').map(value => Number.parseInt(value, 10))
}
if (typeof offset === 'function') {
return popperData => offset(popperData, this._element)
}
return offset
}
_getPopperConfig() {
const defaultBsPopperConfig = {
placement: this._getPlacement(),
modifiers: [{
name: 'preventOverflow',
options: {
boundary: this._config.boundary
}
},
{
name: 'offset',
options: {
offset: this._getOffset()
}
}]
}
// Disable Popper if we have a static display or Dropdown is in Navbar
if (this._inNavbar || this._config.display === 'static') {
Manipulator.setDataAttribute(this._menu, 'popper', 'static') // TODO: v6 remove
defaultBsPopperConfig.modifiers = [{
name: 'applyStyles',
enabled: false
}]
}
return {
...defaultBsPopperConfig,
...execute(this._config.popperConfig, [undefined, defaultBsPopperConfig])
}
}
_selectMenuItem({ key, target }) {
const items = SelectorEngine.find(SELECTOR_VISIBLE_ITEMS, this._menu).filter(element => isVisible(element))
if (!items.length) {
return
}
// if target isn't included in items (e.g. when expanding the dropdown)
// allow cycling to get the last item in case key equals ARROW_UP_KEY
getNextActiveElement(items, target, key === ARROW_DOWN_KEY, !items.includes(target)).focus()
}
// Static
static jQueryInterface(config) {
return this.each(function () {
const data = Dropdown.getOrCreateInstance(this, config)
if (typeof config !== 'string') {
return
}
if (typeof data[config] === 'undefined') {
throw new TypeError(`No method named "${config}"`)
}
data[config]()
})
}
static clearMenus(event) {
if (event.button === RIGHT_MOUSE_BUTTON || (event.type === 'keyup' && event.key !== TAB_KEY)) {
return
}
const openToggles = SelectorEngine.find(SELECTOR_DATA_TOGGLE_SHOWN)
for (const toggle of openToggles) {
const context = Dropdown.getInstance(toggle)
if (!context || context._config.autoClose === false) {
continue
}
const composedPath = event.composedPath()
const isMenuTarget = composedPath.includes(context._menu)
if (
composedPath.includes(context._element) ||
(context._config.autoClose === 'inside' && !isMenuTarget) ||
(context._config.autoClose === 'outside' && isMenuTarget)
) {
continue
}
// Tab navigation through the dropdown menu or events from contained inputs shouldn't close the menu
if (context._menu.contains(event.target) && ((event.type === 'keyup' && event.key === TAB_KEY) || /input|select|option|textarea|form/i.test(event.target.tagName))) {
continue
}
const relatedTarget = { relatedTarget: context._element }
if (event.type === 'click') {
relatedTarget.clickEvent = event
}
context._completeHide(relatedTarget)
}
}
static dataApiKeydownHandler(event) {
// If not an UP | DOWN | ESCAPE key => not a dropdown command
// If input/textarea && if key is other than ESCAPE => not a dropdown command
const isInput = /input|textarea/i.test(event.target.tagName)
const isEscapeEvent = event.key === ESCAPE_KEY
const isUpOrDownEvent = [ARROW_UP_KEY, ARROW_DOWN_KEY].includes(event.key)
if (!isUpOrDownEvent && !isEscapeEvent) {
return
}
if (isInput && !isEscapeEvent) {
return
}
event.preventDefault()
// TODO: v6 revert #37011 & change markup https://getbootstrap.com/docs/5.3/forms/input-group/
const getToggleButton = this.matches(SELECTOR_DATA_TOGGLE) ?
this :
(SelectorEngine.prev(this, SELECTOR_DATA_TOGGLE)[0] ||
SelectorEngine.next(this, SELECTOR_DATA_TOGGLE)[0] ||
SelectorEngine.findOne(SELECTOR_DATA_TOGGLE, event.delegateTarget.parentNode))
const instance = Dropdown.getOrCreateInstance(getToggleButton)
if (isUpOrDownEvent) {
event.stopPropagation()
instance.show()
instance._selectMenuItem(event)
return
}
if (instance._isShown()) { // else is escape and we check if it is shown
event.stopPropagation()
instance.hide()
getToggleButton.focus()
}
}
}
/**
* Data API implementation
*/
EventHandler.on(document, EVENT_KEYDOWN_DATA_API, SELECTOR_DATA_TOGGLE, Dropdown.dataApiKeydownHandler)
EventHandler.on(document, EVENT_KEYDOWN_DATA_API, SELECTOR_MENU, Dropdown.dataApiKeydownHandler)
EventHandler.on(document, EVENT_CLICK_DATA_API, Dropdown.clearMenus)
EventHandler.on(document, EVENT_KEYUP_DATA_API, Dropdown.clearMenus)
EventHandler.on(document, EVENT_CLICK_DATA_API, SELECTOR_DATA_TOGGLE, function (event) {
event.preventDefault()
Dropdown.getOrCreateInstance(this).toggle()
})
/**
* jQuery
*/
defineJQueryPlugin(Dropdown)
export default Dropdown