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/**
* --------------------------------------------------------------------------
* Bootstrap (v5.0.0-beta3): util/backdrop.js
* Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
* --------------------------------------------------------------------------
*/
import EventHandler from '../dom/event-handler'
import { emulateTransitionEnd, execute, getTransitionDurationFromElement, reflow, typeCheckConfig } from './index'
const Default = {
isVisible: true, // if false, we use the backdrop helper without adding any element to the dom
isAnimated: false,
rootElement: document.body // give the choice to place backdrop under different elements
}
const DefaultType = {
isVisible: 'boolean',
isAnimated: 'boolean',
rootElement: 'element'
}
const NAME = 'backdrop'
const CLASS_NAME_BACKDROP = 'modal-backdrop'
const CLASS_NAME_FADE = 'fade'
const CLASS_NAME_SHOW = 'show'
class Backdrop {
constructor(config) {
this._config = this._getConfig(config)
this._isAppended = false
this._element = null
}
show(callback) {
if (!this._config.isVisible) {
execute(callback)
return
}
this._append()
if (this._config.isAnimated) {
reflow(this._getElement())
}
this._getElement().classList.add(CLASS_NAME_SHOW)
this._emulateAnimation(() => {
execute(callback)
})
}
hide(callback) {
if (!this._config.isVisible) {
execute(callback)
return
}
this._getElement().classList.remove(CLASS_NAME_SHOW)
this._emulateAnimation(() => {
this.dispose()
execute(callback)
})
}
// Private
_getElement() {
if (!this._element) {
const backdrop = document.createElement('div')
backdrop.className = CLASS_NAME_BACKDROP
if (this._config.isAnimated) {
backdrop.classList.add(CLASS_NAME_FADE)
}
this._element = backdrop
}
return this._element
}
_getConfig(config) {
config = {
...Default,
...(typeof config === 'object' ? config : {})
}
typeCheckConfig(NAME, config, DefaultType)
return config
}
_append() {
if (this._isAppended) {
return
}
this._config.rootElement.appendChild(this._getElement())
this._isAppended = true
}
dispose() {
if (!this._isAppended) {
return
}
this._getElement().parentNode.removeChild(this._element)
this._isAppended = false
}
_emulateAnimation(callback) {
if (!this._config.isAnimated) {
execute(callback)
return
}
const backdropTransitionDuration = getTransitionDurationFromElement(this._getElement())
EventHandler.one(this._getElement(), 'transitionend', () => execute(callback))
emulateTransitionEnd(this._getElement(), backdropTransitionDuration)
}
}
export default Backdrop
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