util.js

import $ from 'jquery'

/**
 * --------------------------------------------------------------------------
 * Bootstrap (v4.1.3): util.js
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 * --------------------------------------------------------------------------
 */


/**
 * ------------------------------------------------------------------------
 * Private TransitionEnd Helpers
 * ------------------------------------------------------------------------
 */

const TRANSITION_END = 'transitionend'
const MAX_UID = 1000000
const MILLISECONDS_MULTIPLIER = 1000

// Shoutout AngusCroll (https://goo.gl/pxwQGp)
function toType(obj) {
  return {}.toString.call(obj).match(/\s([a-z]+)/i)[1].toLowerCase()
}

function getSpecialTransitionEndEvent() {
  return {
    bindType: TRANSITION_END,
    delegateType: TRANSITION_END,
    handle(event) {
      if ($(event.target).is(this)) {
        return event.handleObj.handler.apply(this, arguments) // eslint-disable-line prefer-rest-params
      }
      return undefined // eslint-disable-line no-undefined
    }
  }
}

function transitionEndEmulator(duration) {
  let called = false

  $(this).one(Util.TRANSITION_END, () => {
    called = true
  })

  setTimeout(() => {
    if (!called) {
      Util.triggerTransitionEnd(this)
    }
  }, duration)

  return this
}

function setTransitionEndSupport() {
  $.fn.emulateTransitionEnd = transitionEndEmulator
  $.event.special[Util.TRANSITION_END] = getSpecialTransitionEndEvent()
}

/**
 * --------------------------------------------------------------------------
 * Public Util Api
 * --------------------------------------------------------------------------
 */

const Util = {

  TRANSITION_END: 'bsTransitionEnd',

  getUID(prefix) {