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/**
* --------------------------------------------------------------------------
* Bootstrap collapse.js
* Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
* --------------------------------------------------------------------------
*/
import BaseComponent from './base-component.js'
import EventHandler from './dom/event-handler.js'
import SelectorEngine from './dom/selector-engine.js'
import {
defineJQueryPlugin,
getElement,
reflow
} from './util/index.js'
/**
* Constants
*/
const NAME = 'collapse'
const DATA_KEY = 'bs.collapse'
const EVENT_KEY = `.${DATA_KEY}`
const DATA_API_KEY = '.data-api'
const EVENT_SHOW = `show${EVENT_KEY}`
const EVENT_SHOWN = `shown${EVENT_KEY}`
const EVENT_HIDE = `hide${EVENT_KEY}`
const EVENT_HIDDEN = `hidden${EVENT_KEY}`
const EVENT_CLICK_DATA_API = `click${EVENT_KEY}${DATA_API_KEY}`
const CLASS_NAME_SHOW = 'show'
const CLASS_NAME_COLLAPSE = 'collapse'
const CLASS_NAME_COLLAPSING = 'collapsing'
const CLASS_NAME_COLLAPSED = 'collapsed'
const CLASS_NAME_DEEPER_CHILDREN = `:scope .${CLASS_NAME_COLLAPSE} .${CLASS_NAME_COLLAPSE}`
const CLASS_NAME_HORIZONTAL = 'collapse-horizontal'
const WIDTH = 'width'
const HEIGHT = 'height'
const SELECTOR_ACTIVES = '.collapse.show, .collapse.collapsing'
const SELECTOR_DATA_TOGGLE = '[data-bs-toggle="collapse"]'
const Default = {
parent: null,
toggle: true
}
const DefaultType = {
parent: '(null|element)',
toggle: 'boolean'
}
/**
* Class definition
*/
class Collapse extends BaseComponent {
constructor(element, config) {
super(element, config)
this._isTransitioning = false
this._triggerArray = []
const toggleList = SelectorEngine.find(SELECTOR_DATA_TOGGLE)
for (const elem of toggleList) {
const selector = SelectorEngine.getSelectorFromElement(elem)
const filterElement = SelectorEngine.find(selector)
.filter(foundElement => foundElement === this._element)
if (selector !== null && filterElement.length) {
this._triggerArray.push(elem)
}
}
this._initializeChildren()
if (!this._config.parent) {
this._addAriaAndCollapsedClass(this._triggerArray, this._isShown())
}
if (this._config.toggle) {
this.toggle()
}
}
// Getters
static get Default() {
return Default
}
static get DefaultType() {
return DefaultType
}
static get NAME() {
return NAME
}
// Public
toggle() {
if (this._isShown()) {
this.hide()
} else {
this.show()
}
}
show() {
if (this._isTransitioning || this._isShown()) {
return
}
let activeChildren = []
// find active children
if (this._config.parent) {
activeChildren = this._getFirstLevelChildren(SELECTOR_ACTIVES)
.filter(element => element !== this._element)
.map(element => Collapse.getOrCreateInstance(element, { toggle: false }))
}
if (activeChildren.length && activeChildren[0]._isTransitioning) {
return
}
const startEvent = EventHandler.trigger(this._element, EVENT_SHOW)
if (startEvent.defaultPrevented) {
return
}
for (const activeInstance of activeChildren) {
activeInstance.hide()
}
const dimension = this._getDimension()
this._element.classList.remove(CLASS_NAME_COLLAPSE)
this._element.classList.add(CLASS_NAME_COLLAPSING)
this._element.style[dimension] = 0
this._addAriaAndCollapsedClass(this._triggerArray, true)
this._isTransitioning = true
const complete = () => {
this._isTransitioning = false
this._element.classList.remove(CLASS_NAME_COLLAPSING)
this._element.classList.add(CLASS_NAME_COLLAPSE, CLASS_NAME_SHOW)
this._element.style[dimension] = ''
EventHandler.trigger(this._element, EVENT_SHOWN)
}
const capitalizedDimension = dimension[0].toUpperCase() + dimension.slice(1)
const scrollSize = `scroll${capitalizedDimension}`
this._queueCallback(complete, this._element, true)
this._element.style[dimension] = `${this._element[scrollSize]}px`
}
hide() {
if (this._isTransitioning || !this._isShown()) {
return
}
const startEvent = EventHandler.trigger(this._element, EVENT_HIDE)
if (startEvent.defaultPrevented) {
return
}
const dimension = this._getDimension()
this._element.style[dimension] = `${this._element.getBoundingClientRect()[dimension]}px`
reflow(this._element)
this._element.classList.add(CLASS_NAME_COLLAPSING)
this._element.classList.remove(CLASS_NAME_COLLAPSE, CLASS_NAME_SHOW)
for (const trigger of this._triggerArray) {
const element = SelectorEngine.getElementFromSelector(trigger)
if (element && !this._isShown(element)) {
this._addAriaAndCollapsedClass([trigger], false)
}
}
this._isTransitioning = true
const complete = () => {
this._isTransitioning = false
this._element.classList.remove(CLASS_NAME_COLLAPSING)
this._element.classList.add(CLASS_NAME_COLLAPSE)
EventHandler.trigger(this._element, EVENT_HIDDEN)
}
this._element.style[dimension] = ''
this._queueCallback(complete, this._element, true)
}
_isShown(element = this._element) {
return element.classList.contains(CLASS_NAME_SHOW)
}
// Private
_configAfterMerge(config) {
config.toggle = Boolean(config.toggle) // Coerce string values
config.parent = getElement(config.parent)
return config
}
_getDimension() {
return this._element.classList.contains(CLASS_NAME_HORIZONTAL) ? WIDTH : HEIGHT
}
_initializeChildren() {
if (!this._config.parent) {
return
}
const children = this._getFirstLevelChildren(SELECTOR_DATA_TOGGLE)
for (const element of children) {
const selected = SelectorEngine.getElementFromSelector(element)
if (selected) {
this._addAriaAndCollapsedClass([element], this._isShown(selected))
}
}
}
_getFirstLevelChildren(selector) {
const children = SelectorEngine.find(CLASS_NAME_DEEPER_CHILDREN, this._config.parent)
// remove children if greater depth
return SelectorEngine.find(selector, this._config.parent).filter(element => !children.includes(element))
}
_addAriaAndCollapsedClass(triggerArray, isOpen) {
if (!triggerArray.length) {
return
}
for (const element of triggerArray) {
element.classList.toggle(CLASS_NAME_COLLAPSED, !isOpen)
element.setAttribute('aria-expanded', isOpen)
}
}
// Static
static jQueryInterface(config) {
const _config = {}
if (typeof config === 'string' && /show|hide/.test(config)) {
_config.toggle = false
}
return this.each(function () {
const data = Collapse.getOrCreateInstance(this, _config)
if (typeof config === 'string') {
if (typeof data[config] === 'undefined') {
throw new TypeError(`No method named "${config}"`)
}
data[config]()
}
})
}
}
/**
* Data API implementation
*/
EventHandler.on(document, EVENT_CLICK_DATA_API, SELECTOR_DATA_TOGGLE, function (event) {
// preventDefault only for <a> elements (which change the URL) not inside the collapsible element
if (event.target.tagName === 'A' || (event.delegateTarget && event.delegateTarget.tagName === 'A')) {
event.preventDefault()
}
for (const element of SelectorEngine.getMultipleElementsFromSelector(this)) {
Collapse.getOrCreateInstance(element, { toggle: false }).toggle()
}
})
/**
* jQuery
*/
defineJQueryPlugin(Collapse)
export default Collapse