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Johann-S authoredUnverified26d86fce
/** * -------------------------------------------------------------------------- * Bootstrap (v4.3.1): dropdown.js * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE) * -------------------------------------------------------------------------- */import { getjQuery, getElementFromSelector, isElement, isVisible, noop, typeCheckConfig} from './util/index'import Data from './dom/data'import EventHandler from './dom/event-handler'import Manipulator from './dom/manipulator'import Popper from 'popper.js'import SelectorEngine from './dom/selector-engine'/** * ------------------------------------------------------------------------ * Constants * ------------------------------------------------------------------------ */const NAME = 'dropdown'const VERSION = '4.3.1'const DATA_KEY = 'bs.dropdown'const EVENT_KEY = `.${DATA_KEY}`const DATA_API_KEY = '.data-api'const ESCAPE_KEYCODE = 27 // KeyboardEvent.which value for Escape (Esc) keyconst SPACE_KEYCODE = 32 // KeyboardEvent.which value for space keyconst TAB_KEYCODE = 9 // KeyboardEvent.which value for tab keyconst ARROW_UP_KEYCODE = 38 // KeyboardEvent.which value for up arrow keyconst ARROW_DOWN_KEYCODE = 40 // KeyboardEvent.which value for down arrow keyconst RIGHT_MOUSE_BUTTON_WHICH = 3 // MouseEvent.which value for the right button (assuming a right-handed mouse)const REGEXP_KEYDOWN = new RegExp(`${ARROW_UP_KEYCODE}|${ARROW_DOWN_KEYCODE}|${ESCAPE_KEYCODE}`)const EVENT_HIDE = `hide${EVENT_KEY}`const EVENT_HIDDEN = `hidden${EVENT_KEY}`const EVENT_SHOW = `show${EVENT_KEY}`const EVENT_SHOWN = `shown${EVENT_KEY}`const EVENT_CLICK = `click${EVENT_KEY}`const EVENT_CLICK_DATA_API = `click${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_DISABLED = 'disabled'const CLASS_NAME_SHOW = 'show'const CLASS_NAME_DROPUP = 'dropup'const CLASS_NAME_DROPRIGHT = 'dropright'const CLASS_NAME_DROPLEFT = 'dropleft'const CLASS_NAME_MENURIGHT = 'dropdown-menu-right'const CLASS_NAME_NAVBAR = 'navbar'const CLASS_NAME_POSITION_STATIC = 'position-static'const SELECTOR_DATA_TOGGLE = '[data-toggle="dropdown"]'const SELECTOR_FORM_CHILD = '.dropdown form'const SELECTOR_MENU = '.dropdown-menu'const SELECTOR_NAVBAR_NAV = '.navbar-nav'const SELECTOR_VISIBLE_ITEMS = '.dropdown-menu .dropdown-item:not(.disabled):not(:disabled)'const PLACEMENT_TOP = 'top-start'const PLACEMENT_TOPEND = 'top-end'const PLACEMENT_BOTTOM = 'bottom-start'const PLACEMENT_BOTTOMEND = 'bottom-end'7172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140
const PLACEMENT_RIGHT = 'right-start'
const PLACEMENT_LEFT = 'left-start'
const Default = {
offset: 0,
flip: true,
boundary: 'scrollParent',
reference: 'toggle',
display: 'dynamic',
popperConfig: null
}
const DefaultType = {
offset: '(number|string|function)',
flip: 'boolean',
boundary: '(string|element)',
reference: '(string|element)',
display: 'string',
popperConfig: '(null|object)'
}
/**
* ------------------------------------------------------------------------
* 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()
Data.setData(element, DATA_KEY, this)
}
// Getters
static get VERSION() {
return VERSION
}
static get Default() {
return Default
}
static get DefaultType() {
return DefaultType
}
// Public
toggle() {
if (this._element.disabled || this._element.classList.contains(CLASS_NAME_DISABLED)) {
return
}
const isActive = this._element.classList.contains(CLASS_NAME_SHOW)
Dropdown.clearMenus()
if (isActive) {
return
}
this.show()
}
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show() {
if (this._element.disabled || this._element.classList.contains(CLASS_NAME_DISABLED) || this._menu.classList.contains(CLASS_NAME_SHOW)) {
return
}
const parent = Dropdown.getParentFromElement(this._element)
const relatedTarget = {
relatedTarget: this._element
}
const showEvent = EventHandler.trigger(this._element, EVENT_SHOW, 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)')
}
let 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 &&
!SelectorEngine.closest(parent, SELECTOR_NAVBAR_NAV)) {
[].concat(...document.body.children)
.forEach(elem => EventHandler.on(elem, 'mouseover', null, noop()))
}
this._element.focus()
this._element.setAttribute('aria-expanded', true)
Manipulator.toggleClass(this._menu, CLASS_NAME_SHOW)
Manipulator.toggleClass(this._element, CLASS_NAME_SHOW)
EventHandler.trigger(parent, EVENT_SHOWN, relatedTarget)
}
hide() {
if (this._element.disabled || this._element.classList.contains(CLASS_NAME_DISABLED) || !this._menu.classList.contains(CLASS_NAME_SHOW)) {
return
}
const parent = Dropdown.getParentFromElement(this._element)
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const relatedTarget = {
relatedTarget: this._element
}
const hideEvent = EventHandler.trigger(parent, EVENT_HIDE, relatedTarget)
if (hideEvent.defaultPrevented) {
return
}
if (this._popper) {
this._popper.destroy()
}
Manipulator.toggleClass(this._menu, CLASS_NAME_SHOW)
Manipulator.toggleClass(this._element, CLASS_NAME_SHOW)
EventHandler.trigger(parent, EVENT_HIDDEN, relatedTarget)
}
dispose() {
Data.removeData(this._element, DATA_KEY)
EventHandler.off(this._element, EVENT_KEY)
this._element = null
this._menu = null
if (this._popper) {
this._popper.destroy()
this._popper = null
}
}
update() {
this._inNavbar = this._detectNavbar()
if (this._popper) {
this._popper.scheduleUpdate()
}
}
// Private
_addEventListeners() {
EventHandler.on(this._element, EVENT_CLICK, event => {
event.preventDefault()
event.stopPropagation()
this.toggle()
})
}
_getConfig(config) {
config = {
...this.constructor.Default,
...Manipulator.getDataAttributes(this._element),
...config
}
typeCheckConfig(
NAME,
config,
this.constructor.DefaultType
)
return config
}
_getMenuElement() {
return SelectorEngine.next(this._element, SELECTOR_MENU)[0]
}
_getPlacement() {
const parentDropdown = this._element.parentNode
let placement = PLACEMENT_BOTTOM
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// 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
}
_detectNavbar() {
return Boolean(SelectorEngine.closest(this._element, `.${CLASS_NAME_NAVBAR}`))
}
_getOffset() {
const offset = {}
if (typeof this._config.offset === 'function') {
offset.fn = data => {
data.offsets = {
...data.offsets,
...this._config.offset(data.offsets, this._element) || {}
}
return data
}
} else {
offset.offset = this._config.offset
}
return offset
}
_getPopperConfig() {
const 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 {
...popperConfig,
...this._config.popperConfig
}
}
// Static
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static dropdownInterface(element, config) {
let data = Data.getData(element, DATA_KEY)
const _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]()
}
}
static jQueryInterface(config) {
return this.each(function () {
Dropdown.dropdownInterface(this, config)
})
}
static clearMenus(event) {
if (event && (event.which === RIGHT_MOUSE_BUTTON_WHICH ||
(event.type === 'keyup' && event.which !== TAB_KEYCODE))) {
return
}
const toggles = SelectorEngine.find(SELECTOR_DATA_TOGGLE)
for (let i = 0, len = toggles.length; i < len; i++) {
const parent = Dropdown.getParentFromElement(toggles[i])
const context = Data.getData(toggles[i], DATA_KEY)
const relatedTarget = {
relatedTarget: toggles[i]
}
if (event && event.type === 'click') {
relatedTarget.clickEvent = event
}
if (!context) {
continue
}
const dropdownMenu = context._menu
if (!toggles[i].classList.contains(CLASS_NAME_SHOW)) {
continue
}
if (event && ((event.type === 'click' &&
/input|textarea/i.test(event.target.tagName)) ||
(event.type === 'keyup' && event.which === TAB_KEYCODE)) &&
dropdownMenu.contains(event.target)) {
continue
}
const hideEvent = EventHandler.trigger(parent, EVENT_HIDE, 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) {
[].concat(...document.body.children)
.forEach(elem => EventHandler.off(elem, 'mouseover', null, noop()))
}
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toggles[i].setAttribute('aria-expanded', 'false')
if (context._popper) {
context._popper.destroy()
}
dropdownMenu.classList.remove(CLASS_NAME_SHOW)
toggles[i].classList.remove(CLASS_NAME_SHOW)
EventHandler.trigger(parent, EVENT_HIDDEN, relatedTarget)
}
}
static getParentFromElement(element) {
return getElementFromSelector(element) || element.parentNode
}
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) ||
SelectorEngine.closest(event.target, SELECTOR_MENU))) :
!REGEXP_KEYDOWN.test(event.which)) {
return
}
event.preventDefault()
event.stopPropagation()
if (this.disabled || this.classList.contains(CLASS_NAME_DISABLED)) {
return
}
const parent = Dropdown.getParentFromElement(this)
const isActive = this.classList.contains(CLASS_NAME_SHOW)
if (event.which === ESCAPE_KEYCODE) {
const button = this.matches(SELECTOR_DATA_TOGGLE) ? this : SelectorEngine.prev(this, SELECTOR_DATA_TOGGLE)[0]
button.focus()
Dropdown.clearMenus()
return
}
if (!isActive || event.which === SPACE_KEYCODE) {
Dropdown.clearMenus()
return
}
const items = SelectorEngine.find(SELECTOR_VISIBLE_ITEMS, parent)
.filter(isVisible)
if (!items.length) {
return
}
let index = items.indexOf(event.target) || 0
if (event.which === ARROW_UP_KEYCODE && index > 0) { // Up
index--
}
if (event.which === ARROW_DOWN_KEYCODE && index < items.length - 1) { // Down
index++
}
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items[index].focus()
}
static getInstance(element) {
return Data.getData(element, DATA_KEY)
}
}
/**
* ------------------------------------------------------------------------
* 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()
event.stopPropagation()
Dropdown.dropdownInterface(this, 'toggle')
})
EventHandler
.on(document, EVENT_CLICK_DATA_API, SELECTOR_FORM_CHILD, e => e.stopPropagation())
const $ = getjQuery()
/**
* ------------------------------------------------------------------------
* jQuery
* ------------------------------------------------------------------------
* add .dropdown to jQuery only if jQuery is present
*/
/* istanbul ignore if */
if ($) {
const JQUERY_NO_CONFLICT = $.fn[NAME]
$.fn[NAME] = Dropdown.jQueryInterface
$.fn[NAME].Constructor = Dropdown
$.fn[NAME].noConflict = () => {
$.fn[NAME] = JQUERY_NO_CONFLICT
return Dropdown.jQueryInterface
}
}
export default Dropdown