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/**
* --------------------------------------------------------------------------
* Bootstrap modal.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 Backdrop from './util/backdrop.js'
import { enableDismissTrigger } from './util/component-functions.js'
import FocusTrap from './util/focustrap.js'
import {
defineJQueryPlugin, isRTL, isVisible, reflow
} from './util/index.js'
import ScrollBarHelper from './util/scrollbar.js'
/**
* Constants
*/
const NAME = 'modal'
const DATA_KEY = 'bs.modal'
const EVENT_KEY = `.${DATA_KEY}`
const DATA_API_KEY = '.data-api'
const ESCAPE_KEY = 'Escape'
const EVENT_HIDE = `hide${EVENT_KEY}`
const EVENT_HIDE_PREVENTED = `hidePrevented${EVENT_KEY}`
const EVENT_HIDDEN = `hidden${EVENT_KEY}`
const EVENT_SHOW = `show${EVENT_KEY}`
const EVENT_SHOWN = `shown${EVENT_KEY}`
const EVENT_RESIZE = `resize${EVENT_KEY}`
const EVENT_CLICK_DISMISS = `click.dismiss${EVENT_KEY}`
const EVENT_MOUSEDOWN_DISMISS = `mousedown.dismiss${EVENT_KEY}`
const EVENT_KEYDOWN_DISMISS = `keydown.dismiss${EVENT_KEY}`
const EVENT_CLICK_DATA_API = `click${EVENT_KEY}${DATA_API_KEY}`
const CLASS_NAME_OPEN = 'modal-open'
const CLASS_NAME_FADE = 'fade'
const CLASS_NAME_SHOW = 'show'
const CLASS_NAME_STATIC = 'modal-static'
const OPEN_SELECTOR = '.modal.show'
const SELECTOR_DIALOG = '.modal-dialog'
const SELECTOR_MODAL_BODY = '.modal-body'
const SELECTOR_DATA_TOGGLE = '[data-bs-toggle="modal"]'
const Default = {
backdrop: true,
focus: true,
keyboard: true
}
const DefaultType = {
backdrop: '(boolean|string)',
focus: 'boolean',
keyboard: 'boolean'
}
/**
* Class definition
*/
class Modal extends BaseComponent {
constructor(element, config) {
super(element, config)
this._dialog = SelectorEngine.findOne(SELECTOR_DIALOG, this._element)
this._backdrop = this._initializeBackDrop()
this._focustrap = this._initializeFocusTrap()
this._isShown = false
this._isTransitioning = false
this._scrollBar = new ScrollBarHelper()
this._addEventListeners()
}
// Getters
static get Default() {
return Default
}
static get DefaultType() {
return DefaultType
}
static get NAME() {
return NAME
}
// Public
toggle(relatedTarget) {
return this._isShown ? this.hide() : this.show(relatedTarget)
}
show(relatedTarget) {
if (this._isShown || this._isTransitioning) {
return
}
const showEvent = EventHandler.trigger(this._element, EVENT_SHOW, {
relatedTarget
})
if (showEvent.defaultPrevented) {
return
}
this._isShown = true
this._isTransitioning = true
this._scrollBar.hide()
document.body.classList.add(CLASS_NAME_OPEN)
this._adjustDialog()
this._backdrop.show(() => this._showElement(relatedTarget))
}
hide() {
if (!this._isShown || this._isTransitioning) {
return
}
const hideEvent = EventHandler.trigger(this._element, EVENT_HIDE)
if (hideEvent.defaultPrevented) {
return
}
this._isShown = false
this._isTransitioning = true
this._focustrap.deactivate()
this._element.classList.remove(CLASS_NAME_SHOW)
this._queueCallback(() => this._hideModal(), this._element, this._isAnimated())
}
dispose() {
EventHandler.off(window, EVENT_KEY)
EventHandler.off(this._dialog, EVENT_KEY)
this._backdrop.dispose()
this._focustrap.deactivate()
super.dispose()
}
handleUpdate() {
this._adjustDialog()
}
// Private
_initializeBackDrop() {
return new Backdrop({
isVisible: Boolean(this._config.backdrop), // 'static' option will be translated to true, and booleans will keep their value,
isAnimated: this._isAnimated()
})
}
_initializeFocusTrap() {
return new FocusTrap({
trapElement: this._element
})
}
_showElement(relatedTarget) {
// try to append dynamic modal
if (!document.body.contains(this._element)) {
document.body.append(this._element)
}
this._element.style.display = 'block'
this._element.removeAttribute('aria-hidden')
this._element.setAttribute('aria-modal', true)
this._element.setAttribute('role', 'dialog')
this._element.scrollTop = 0
const modalBody = SelectorEngine.findOne(SELECTOR_MODAL_BODY, this._dialog)
if (modalBody) {
modalBody.scrollTop = 0
}
reflow(this._element)
this._element.classList.add(CLASS_NAME_SHOW)
const transitionComplete = () => {
if (this._config.focus) {
this._focustrap.activate()
}
this._isTransitioning = false
EventHandler.trigger(this._element, EVENT_SHOWN, {
relatedTarget
})
}
this._queueCallback(transitionComplete, this._dialog, this._isAnimated())
}
_addEventListeners() {
EventHandler.on(this._element, EVENT_KEYDOWN_DISMISS, event => {
if (event.key !== ESCAPE_KEY) {
return
}
if (this._config.keyboard) {
this.hide()
return
}
this._triggerBackdropTransition()
})
EventHandler.on(window, EVENT_RESIZE, () => {
if (this._isShown && !this._isTransitioning) {
this._adjustDialog()
}
})
EventHandler.on(this._element, EVENT_MOUSEDOWN_DISMISS, event => {
// a bad trick to segregate clicks that may start inside dialog but end outside, and avoid listen to scrollbar clicks
EventHandler.one(this._element, EVENT_CLICK_DISMISS, event2 => {
if (this._element !== event.target || this._element !== event2.target) {
return
}
if (this._config.backdrop === 'static') {
this._triggerBackdropTransition()
return
}
if (this._config.backdrop) {
this.hide()
}
})
})
}
_hideModal() {
this._element.style.display = 'none'
this._element.setAttribute('aria-hidden', true)
this._element.removeAttribute('aria-modal')
this._element.removeAttribute('role')
this._isTransitioning = false
this._backdrop.hide(() => {
document.body.classList.remove(CLASS_NAME_OPEN)
this._resetAdjustments()
this._scrollBar.reset()
EventHandler.trigger(this._element, EVENT_HIDDEN)
})
}
_isAnimated() {
return this._element.classList.contains(CLASS_NAME_FADE)
}
_triggerBackdropTransition() {
const hideEvent = EventHandler.trigger(this._element, EVENT_HIDE_PREVENTED)
if (hideEvent.defaultPrevented) {
return
}
const isModalOverflowing = this._element.scrollHeight > document.documentElement.clientHeight
const initialOverflowY = this._element.style.overflowY
// return if the following background transition hasn't yet completed
if (initialOverflowY === 'hidden' || this._element.classList.contains(CLASS_NAME_STATIC)) {
return
}
if (!isModalOverflowing) {
this._element.style.overflowY = 'hidden'
}
this._element.classList.add(CLASS_NAME_STATIC)
this._queueCallback(() => {
this._element.classList.remove(CLASS_NAME_STATIC)
this._queueCallback(() => {
this._element.style.overflowY = initialOverflowY
}, this._dialog)
}, this._dialog)
this._element.focus()
}
/**
* The following methods are used to handle overflowing modals
*/
_adjustDialog() {
const isModalOverflowing = this._element.scrollHeight > document.documentElement.clientHeight
const scrollbarWidth = this._scrollBar.getWidth()
const isBodyOverflowing = scrollbarWidth > 0
if (isBodyOverflowing && !isModalOverflowing) {
const property = isRTL() ? 'paddingLeft' : 'paddingRight'
this._element.style[property] = `${scrollbarWidth}px`
}
if (!isBodyOverflowing && isModalOverflowing) {
const property = isRTL() ? 'paddingRight' : 'paddingLeft'
this._element.style[property] = `${scrollbarWidth}px`
}
}
_resetAdjustments() {
this._element.style.paddingLeft = ''
this._element.style.paddingRight = ''
}
// Static
static jQueryInterface(config, relatedTarget) {
return this.each(function () {
const data = Modal.getOrCreateInstance(this, config)
if (typeof config !== 'string') {
return
}
if (typeof data[config] === 'undefined') {
throw new TypeError(`No method named "${config}"`)
}
data[config](relatedTarget)
})
}
}
/**
* Data API implementation
*/
EventHandler.on(document, EVENT_CLICK_DATA_API, SELECTOR_DATA_TOGGLE, function (event) {
const target = SelectorEngine.getElementFromSelector(this)
if (['A', 'AREA'].includes(this.tagName)) {
event.preventDefault()
}
EventHandler.one(target, EVENT_SHOW, showEvent => {
if (showEvent.defaultPrevented) {
// only register focus restorer if modal will actually get shown
return
}
EventHandler.one(target, EVENT_HIDDEN, () => {
if (isVisible(this)) {
this.focus()
}
})
})
// avoid conflict when clicking modal toggler while another one is open
const alreadyOpen = SelectorEngine.findOne(OPEN_SELECTOR)
if (alreadyOpen) {
Modal.getInstance(alreadyOpen).hide()
}
const data = Modal.getOrCreateInstance(target)
data.toggle(this)
})
enableDismissTrigger(Modal)
/**
* jQuery
*/
defineJQueryPlugin(Modal)
export default Modal