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util.js 2.51 KiB
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/**
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 * --------------------------------------------------------------------------
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 * Bootstrap (v4.0.0): util.js
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 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
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 * --------------------------------------------------------------------------
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 */
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/**
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 * --------------------------------------------------------------------------
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 * Public Util Api
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 * --------------------------------------------------------------------------
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 */
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var Util = {
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  TRANSITION_END: 'bsTransitionEnd',
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  getUID(prefix) {
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    do prefix += ~~(Math.random() * 1000000)
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    while (document.getElementById(prefix))
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    return prefix
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  },
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  getSelectorFromElement(element) {
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    let selector = element.getAttribute('data-target')
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    if (!selector) {
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      selector = element.getAttribute('href') || ''
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      selector = /^#[a-z]/i.test(selector) ? selector : null
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    }
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    return selector
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  },
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  reflow(element) {
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    new Function('bs', 'return bs')(element.offsetHeight)
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  },
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  supportsTransitionEnd() {
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    return !!transition
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  }
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}
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export default Util
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/**
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 * --------------------------------------------------------------------------
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 * Private TransitionEnd Helpers
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 * --------------------------------------------------------------------------
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 */
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let transition = false
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const TransitionEndEvent = {
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  WebkitTransition : 'webkitTransitionEnd',
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  MozTransition    : 'transitionend',
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  OTransition      : 'oTransitionEnd otransitionend',
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  transition       : 'transitionend'
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}
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function getSpecialTransitionEndEvent() {
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  return {
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    bindType: transition.end,
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    delegateType: transition.end,
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    handle: function (event) {
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      if ($(event.target).is(this)) {
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        return event.handleObj.handler.apply(this, arguments)
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} } } } function transitionEndTest() { if (window.QUnit) { return false } let el = document.createElement('bootstrap') for (var name in TransitionEndEvent) { if (el.style[name] !== undefined) { return { end: TransitionEndEvent[name] } } } return false } function transitionEndEmulator(duration) { let called = false $(this).one(Util.TRANSITION_END, function () { called = true }) setTimeout(() => { if (!called) { $(this).trigger(transition.end) } }, duration) return this } function setTransitionEndSupport() { transition = transitionEndTest() $.fn.emulateTransitionEnd = transitionEndEmulator if (Util.supportsTransitionEnd()) { $.event.special[Util.TRANSITION_END] = getSpecialTransitionEndEvent() } } setTransitionEndSupport()