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* --------------------------------------------------------------------------
* CoreUI (v3.3.0): dropdown.js
* Licensed under MIT (https://coreui.io/license)
*
* This component is a modified version of the Bootstrap's dropdown.js
* Bootstrap (v5.0.0): 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 { createPopper } from '@popperjs/core'
import SelectorEngine from './dom/selector-engine'
/**
* ------------------------------------------------------------------------
* Constants
* ------------------------------------------------------------------------
*/
const NAME = 'dropdown'
const VERSION = '3.2.2'
const DATA_KEY = 'coreui.dropdown'
const EVENT_KEY = `.${DATA_KEY}`
const DATA_API_KEY = '.data-api'
const ESCAPE_KEY = 'Escape'
const SPACE_KEY = 'Space'
const TAB_KEY = 'Tab'
const ARROW_UP_KEY = 'ArrowUp'
const ARROW_DOWN_KEY = 'ArrowDown'
const RIGHT_MOUSE_BUTTON = 2 // MouseEvent.button value for the secondary button, usually the right button
const REGEXP_KEYDOWN = new RegExp(`${ARROW_UP_KEY}|${ARROW_DOWN_KEY}|${ESCAPE_KEY}`)
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_HEADER = 'c-header'
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_HEADER_NAV = '.c-header-nav'
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'
const PLACEMENT_RIGHT = 'right-start'
const PLACEMENT_LEFT = 'left-start'
const Default = {
offset: [0, 0],
flip: true,
boundary: 'scrollParent',
reference: 'toggle',
display: 'dynamic',
popperConfig: null
}
const DefaultType = {
offset: '(array|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._inHeader = this._detectHeader()
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._menu.classList.contains(CLASS_NAME_SHOW)
Dropdown.clearMenus()
if (isActive) {
return
}
this.show()
}
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(parent, EVENT_SHOW, relatedTarget)
if (showEvent.defaultPrevented) {
return
}
// Disable totally Popper.js for Dropdown in Navbar
if (!this._inNavbar && !this._inHeader) {
Iif (typeof createPopper === 'undefined') {
throw new TypeError('CoreUI\'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 = createPopper(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)) {
[].concat(...document.body.children)
.forEach(elem => EventHandler.on(elem, 'mouseover', null, noop()))
}
if ('ontouchstart' in document.documentElement &&
!parent.closest(SELECTOR_HEADER_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(parent, 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)
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(parent, 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()
this._inHeader = this._detectHeader()
if (this._popper) {
this._popper.update()
}
}
// 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() {
const parent = Dropdown.getParentFromElement(this._element)
return SelectorEngine.findOne(SELECTOR_MENU, parent)
}
_getPlacement() {
const parentDropdown = this._element.parentNode
let placement = PLACEMENT_BOTTOM
// 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(this._element.closest(`.${CLASS_NAME_NAVBAR}`))
}
_detectHeader() {
return Boolean(this._element.closest(`.${CLASS_NAME_HEADER}`))
}
_getOffset() {
let offset = []
if (typeof this._config.offset === 'function') {
offset = ({ placement, reference, popper }) => this._config.offset({ placement, reference, popper })
} else {
offset = this._config.offset
}
return offset
}
_getPopperConfig() {
const popperConfig = {
placement: this._getPlacement(),
modifiers: [
{
name: 'offset',
options: {
offset: this._getOffset()
}
},
{
name: 'flip',
enabled: this._config.flip
},
{
name: 'preventOverflow',
options: {
boundary: this._config.boundary
}
}
]
}
// Disable Popper.js if we have a static display
if (this._config.display === 'static') {
popperConfig.modifiers = {
name: 'applyStyles',
enabled: false
}
}
return {
...popperConfig,
...this._config.popperConfig
}
}
// Static
static dropdownInterface(element, config) {
let data = Data.getData(element, DATA_KEY)
const _config = typeof config === 'object' ? config : null
if (!data) {
data = new Dropdown(element, _config)
}
if (typeof config === 'string') {
if (typeof data[config] === 'undefined') {
throw new TypeError(`No method named "${config}"`)
}
data[config]()
}
}
static jQueryInterface(config) {
return this.each(function () {
Dropdown.dropdownInterface(this, config)
})
}
static clearMenus(event) {
Iif (event && (event.button === RIGHT_MOUSE_BUTTON ||
(event.type === 'keyup' && event.key !== TAB_KEY))) {
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 (!parent.classList.contains(CLASS_NAME_SHOW)) {
continue
}
Iif (event && ((event.type === 'click' &&
/input|textarea/i.test(event.target.tagName)) ||
(event.type === 'keyup' && event.key === TAB_KEY)) &&
parent.contains(event.target)) {
continue
}
const hideEvent = EventHandler.trigger(parent, EVENT_HIDE, relatedTarget)
Iif (hideEvent.defaultPrevented) {
continue
}
// If this is a touch-enabled device we remove the extra
// empty mouseover listeners we added for iOS support
Eif ('ontouchstart' in document.documentElement) {
[].concat(...document.body.children)
.forEach(elem => EventHandler.off(elem, 'mouseover', null, noop()))
}
toggles[i].setAttribute('aria-expanded', 'false')
Eif (context._popper) {
context._popper.destroy()
}
dropdownMenu.classList.remove(CLASS_NAME_SHOW)
parent.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.key === SPACE_KEY || (event.key !== ESCAPE_KEY &&
((event.key !== ARROW_DOWN_KEY && event.key !== ARROW_UP_KEY) ||
event.target.closest(SELECTOR_MENU))) :
!REGEXP_KEYDOWN.test(event.key)) {
return
}
event.preventDefault()
event.stopPropagation()
if (this.disabled || this.classList.contains(CLASS_NAME_DISABLED)) {
return
}
const parent = Dropdown.getParentFromElement(this)
const isActive = parent.classList.contains(CLASS_NAME_SHOW)
if (event.key === ESCAPE_KEY) {
const button = this.matches(SELECTOR_DATA_TOGGLE) ? this : SelectorEngine.prev(this, SELECTOR_DATA_TOGGLE)[0]
button.focus()
Dropdown.clearMenus()
return
}
Iif (!isActive || event.key === SPACE_KEY) {
Dropdown.clearMenus()
return
}
const items = SelectorEngine.find(SELECTOR_VISIBLE_ITEMS, parent).filter(isVisible)
Iif (!items.length) {
return
}
let index = items.indexOf(event.target)
if (event.key === ARROW_UP_KEY && index > 0) { // Up
index--
}
if (event.key === ARROW_DOWN_KEY && index < items.length - 1) { // Down
index++
}
// index is -1 if the first keydown is an ArrowUp
index = index === -1 ? 0 : index
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
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