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* --------------------------------------------------------------------------
* Bootstrap (v5.2.3): util/backdrop.js
* Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
* --------------------------------------------------------------------------
*/
import EventHandler from '../dom/event-handler'
import { execute, executeAfterTransition, getElement, reflow } from './index'
import Config from './config'
/**
* Constants
*/
const NAME = 'backdrop'
const CLASS_NAME_FADE = 'fade'
const CLASS_NAME_SHOW = 'show'
const EVENT_MOUSEDOWN = `mousedown.bs.${NAME}`
const Default = {
className: 'modal-backdrop',
clickCallback: null,
isAnimated: false,
isVisible: true, // if false, we use the backdrop helper without adding any element to the dom
rootElement: 'body' // give the choice to place backdrop under different elements
}
const DefaultType = {
className: 'string',
clickCallback: '(function|null)',
isAnimated: 'boolean',
isVisible: 'boolean',
rootElement: '(element|string)'
}
/**
* Class definition
*/
class Backdrop extends Config {
constructor(config) {
super()
this._config = this._getConfig(config)
this._isAppended = false
this._element = null
}
// Getters
static get Default() {
return Default
}
static get DefaultType() {
return DefaultType
}
static get NAME() {
return NAME
}
// Public
show(callback) {
if (!this._config.isVisible) {
execute(callback)
return
}
this._append()
const element = this._getElement()
if (this._config.isAnimated) {
reflow(element)
}
element.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)
})
}
dispose() {
if (!this._isAppended) {
return
}
EventHandler.off(this._element, EVENT_MOUSEDOWN)
this._element.remove()
this._isAppended = false
}
// Private
_getElement() {
if (!this._element) {
const backdrop = document.createElement('div')
backdrop.className = this._config.className
if (this._config.isAnimated) {
backdrop.classList.add(CLASS_NAME_FADE)
}
this._element = backdrop
}
return this._element
}
_configAfterMerge(config) {
// use getElement() with the default "body" to get a fresh Element on each instantiation
config.rootElement = getElement(config.rootElement)
return config
}
_append() {
if (this._isAppended) {
return
}
const element = this._getElement()
this._config.rootElement.append(element)
EventHandler.on(element, EVENT_MOUSEDOWN, () => {
execute(this._config.clickCallback)
})
this._isAppended = true
}
_emulateAnimation(callback) {
executeAfterTransition(callback, this._getElement(), this._config.isAnimated)
}
}
export default Backdrop
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