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/* istanbul ignore file */
/**
* --------------------------------------------------------------------------
* Bootstrap (v4.3.1): dom/polyfill.js
* Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
* --------------------------------------------------------------------------
*/
import { getUID } from '../util/index'
let { matches, closest } = Element.prototype
let find = Element.prototype.querySelectorAll
let findOne = Element.prototype.querySelector
let createCustomEvent = (eventName, params) => {
const cEvent = new CustomEvent(eventName, params)
return cEvent
}
if (typeof window.CustomEvent !== 'function') {
createCustomEvent = (eventName, params) => {
params = params || { bubbles: false, cancelable: false, detail: null }
const evt = document.createEvent('CustomEvent')
evt.initCustomEvent(eventName, params.bubbles, params.cancelable, params.detail)
return evt
}
}
const workingDefaultPrevented = (() => {
const e = document.createEvent('CustomEvent')
e.initEvent('Bootstrap', true, true)
e.preventDefault()
return e.defaultPrevented
})()
if (!workingDefaultPrevented) {
const origPreventDefault = Event.prototype.preventDefault
Event.prototype.preventDefault = function () {
if (!this.cancelable) {
return
}
origPreventDefault.call(this)
Object.defineProperty(this, 'defaultPrevented', {
get() {
return true
},
configurable: true
})
}
}
// MSEdge resets defaultPrevented flag upon dispatchEvent call if at least one listener is attached
const defaultPreventedPreservedOnDispatch = (() => {
const e = createCustomEvent('Bootstrap', {
cancelable: true
})
const element = document.createElement('div')
element.addEventListener('Bootstrap', () => null)
e.preventDefault()
element.dispatchEvent(e)
return e.defaultPrevented
})()
if (!matches) {
matches = Element.prototype.msMatchesSelector || Element.prototype.webkitMatchesSelector
}
if (!closest) {
closest = function (selector) {
let element = this
do {
if (matches.call(element, selector)) {
return element
}
element = element.parentElement || element.parentNode
} while (element !== null && element.nodeType === 1)
return null
}
}
const scopeSelectorRegex = /:scope\b/
const supportScopeQuery = (() => {
const element = document.createElement('div')
try {
element.querySelectorAll(':scope *')
} catch (_) {
return false
}
return true
})()
if (!supportScopeQuery) {
find = function (selector) {
if (!scopeSelectorRegex.test(selector)) {
return this.querySelectorAll(selector)
}
const hasId = Boolean(this.id)
if (!hasId) {
this.id = getUID('scope')
}
let nodeList = null
try {
selector = selector.replace(scopeSelectorRegex, `#${this.id}`)
nodeList = this.querySelectorAll(selector)
} finally {
if (!hasId) {
this.removeAttribute('id')
}
}
return nodeList
}
findOne = function (selector) {
if (!scopeSelectorRegex.test(selector)) {
return this.querySelector(selector)
}
const matches = find.call(this, selector)
if (typeof matches[0] !== 'undefined') {
return matches[0]
}
return null
}
}
export {
createCustomEvent,
find,
findOne,
matches,
closest,
defaultPreventedPreservedOnDispatch
}
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