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* --------------------------------------------------------------------------
* Bootstrap (v5.2.3): offcanvas.js
* Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
* --------------------------------------------------------------------------
*/
import {
defineJQueryPlugin,
getElementFromSelector,
isDisabled,
isVisible
} from './util/index'
import ScrollBarHelper from './util/scrollbar'
import EventHandler from './dom/event-handler'
import BaseComponent from './base-component'
import SelectorEngine from './dom/selector-engine'
import Backdrop from './util/backdrop'
import FocusTrap from './util/focustrap'
import { enableDismissTrigger } from './util/component-functions'
/**
* Constants
*/
const NAME = 'offcanvas'
const DATA_KEY = 'bs.offcanvas'
const EVENT_KEY = `.${DATA_KEY}`
const DATA_API_KEY = '.data-api'
const EVENT_LOAD_DATA_API = `load${EVENT_KEY}${DATA_API_KEY}`
const ESCAPE_KEY = 'Escape'
const CLASS_NAME_SHOW = 'show'
const CLASS_NAME_SHOWING = 'showing'
const CLASS_NAME_HIDING = 'hiding'
const CLASS_NAME_BACKDROP = 'offcanvas-backdrop'
const OPEN_SELECTOR = '.offcanvas.show'
const EVENT_SHOW = `show${EVENT_KEY}`
const EVENT_SHOWN = `shown${EVENT_KEY}`
const EVENT_HIDE = `hide${EVENT_KEY}`
const EVENT_HIDE_PREVENTED = `hidePrevented${EVENT_KEY}`
const EVENT_HIDDEN = `hidden${EVENT_KEY}`
const EVENT_RESIZE = `resize${EVENT_KEY}`
const EVENT_CLICK_DATA_API = `click${EVENT_KEY}${DATA_API_KEY}`
const EVENT_KEYDOWN_DISMISS = `keydown.dismiss${EVENT_KEY}`
const SELECTOR_DATA_TOGGLE = '[data-bs-toggle="offcanvas"]'
const Default = {
backdrop: true,
keyboard: true,
scroll: false
}
const DefaultType = {
backdrop: '(boolean|string)',
keyboard: 'boolean',
scroll: 'boolean'
}
/**
* Class definition
*/
class Offcanvas extends BaseComponent {
constructor(element, config) {
super(element, config)
this._isShown = false
this._backdrop = this._initializeBackDrop()
this._focustrap = this._initializeFocusTrap()
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) {
return
}
const showEvent = EventHandler.trigger(this._element, EVENT_SHOW, { relatedTarget })
if (showEvent.defaultPrevented) {
return
}
this._isShown = true
this._backdrop.show()
if (!this._config.scroll) {
new ScrollBarHelper().hide()
}
this._element.setAttribute('aria-modal', true)
this._element.setAttribute('role', 'dialog')
this._element.classList.add(CLASS_NAME_SHOWING)
const completeCallBack = () => {
if (!this._config.scroll || this._config.backdrop) {
this._focustrap.activate()
}
this._element.classList.add(CLASS_NAME_SHOW)
this._element.classList.remove(CLASS_NAME_SHOWING)
EventHandler.trigger(this._element, EVENT_SHOWN, { relatedTarget })
}
this._queueCallback(completeCallBack, this._element, true)
}
hide() {
if (!this._isShown) {
return
}
const hideEvent = EventHandler.trigger(this._element, EVENT_HIDE)
if (hideEvent.defaultPrevented) {
return
}
this._focustrap.deactivate()
this._element.blur()
this._isShown = false
this._element.classList.add(CLASS_NAME_HIDING)
this._backdrop.hide()
const completeCallback = () => {
this._element.classList.remove(CLASS_NAME_SHOW, CLASS_NAME_HIDING)
this._element.removeAttribute('aria-modal')
this._element.removeAttribute('role')
if (!this._config.scroll) {
new ScrollBarHelper().reset()
}
EventHandler.trigger(this._element, EVENT_HIDDEN)
}
this._queueCallback(completeCallback, this._element, true)
}
dispose() {
this._backdrop.dispose()
this._focustrap.deactivate()
super.dispose()
}
// Private
_initializeBackDrop() {
const clickCallback = () => {
if (this._config.backdrop === 'static') {
EventHandler.trigger(this._element, EVENT_HIDE_PREVENTED)
return
}
this.hide()
}
// 'static' option will be translated to true, and booleans will keep their value
const isVisible = Boolean(this._config.backdrop)
return new Backdrop({
className: CLASS_NAME_BACKDROP,
isVisible,
isAnimated: true,
rootElement: this._element.parentNode,
clickCallback: isVisible ? clickCallback : null
})
}
_initializeFocusTrap() {
return new FocusTrap({
trapElement: this._element
})
}
_addEventListeners() {
EventHandler.on(this._element, EVENT_KEYDOWN_DISMISS, event => {
if (event.key !== ESCAPE_KEY) {
return
}
if (!this._config.keyboard) {
EventHandler.trigger(this._element, EVENT_HIDE_PREVENTED)
return
}
this.hide()
})
}
// Static
static jQueryInterface(config) {
return this.each(function () {
const data = Offcanvas.getOrCreateInstance(this, config)
if (typeof config !== 'string') {
return
}
if (data[config] === undefined || config.startsWith('_') || config === 'constructor') {
throw new TypeError(`No method named "${config}"`)
}
data[config](this)
})
}
}
/**
* Data API implementation
*/
EventHandler.on(document, EVENT_CLICK_DATA_API, SELECTOR_DATA_TOGGLE, function (event) {
const target = getElementFromSelector(this)
if (['A', 'AREA'].includes(this.tagName)) {
event.preventDefault()
}
if (isDisabled(this)) {
return
}
EventHandler.one(target, EVENT_HIDDEN, () => {
// focus on trigger when it is closed
if (isVisible(this)) {
this.focus()
}
})
// avoid conflict when clicking a toggler of an offcanvas, while another is open
const alreadyOpen = SelectorEngine.findOne(OPEN_SELECTOR)
if (alreadyOpen && alreadyOpen !== target) {
Offcanvas.getInstance(alreadyOpen).hide()
}
const data = Offcanvas.getOrCreateInstance(target)
data.toggle(this)
})
EventHandler.on(window, EVENT_LOAD_DATA_API, () => {
for (const selector of SelectorEngine.find(OPEN_SELECTOR)) {
Offcanvas.getOrCreateInstance(selector).show()
}
})
EventHandler.on(window, EVENT_RESIZE, () => {
for (const element of SelectorEngine.find('[aria-modal][class*=show][class*=offcanvas-]')) {
Eif (getComputedStyle(element).position !== 'fixed') {
Offcanvas.getOrCreateInstance(element).hide()
}
}
})
enableDismissTrigger(Offcanvas)
/**
* jQuery
*/
defineJQueryPlugin(Offcanvas)
export default Offcanvas
|