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* --------------------------------------------------------------------------\n * Bootstrap (v4.0.0-alpha.5): util.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)\n * --------------------------------------------------------------------------\n */\n\nconst Util = (($) => {\n\n\n  /**\n   * ------------------------------------------------------------------------\n   * Private TransitionEnd Helpers\n   * ------------------------------------------------------------------------\n   */\n\n  let transition = false\n\n  const MAX_UID = 1000000\n\n  const TransitionEndEvent = {\n    WebkitTransition : 'webkitTransitionEnd',\n    MozTransition    : 'transitionend',\n    OTransition      : 'oTransitionEnd otransitionend',\n    transition       : 'transitionend'\n  }\n\n  // shoutout AngusCroll (https://goo.gl/pxwQGp)\n  function toType(obj) {\n    return ({}).toString.call(obj).match(/\\s([a-zA-Z]+)/)[1].toLowerCase()\n  }\n\n  function isElement(obj) {\n    return (obj[0] || obj).nodeType\n  }\n\n  function getSpecialTransitionEndEvent() {\n    return {\n      bindType: transition.end,\n      delegateType: transition.end,\n      handle(event) {\n        if ($(event.target).is(this)) {\n          return event.handleObj.handler.apply(this, arguments) // eslint-disable-line prefer-rest-params\n        }\n        return undefined\n      }\n    }\n  }\n\n  function transitionEndTest() {\n    if (window.QUnit) {\n      return false\n    }\n\n    let el = document.createElement('bootstrap')\n\n    for (let name in TransitionEndEvent) {\n      if (el.style[name] !== undefined) {\n        return { end: TransitionEndEvent[name] }\n      }\n    }\n\n    return false\n  }\n\n  function transitionEndEmulator(duration) {\n    let called = false\n\n    $(this).one(Util.TRANSITION_END, () => {\n      called = true\n    })\n\n    setTimeout(() => {\n      if (!called) {\n        Util.triggerTransitionEnd(this)\n      }\n    }, duration)\n\n    return this\n  }\n\n  function setTransitionEndSupport() {\n    transition = transitionEndTest()\n\n    $.fn.emulateTransitionEnd = transitionEndEmulator\n\n    if (Util.supportsTransitionEnd()) {\n      $.event.special[Util.TRANSITION_END] = getSpecialTransitionEndEvent()\n    }\n  }\n\n\n  /**\n   * --------------------------------------------------------------------------\n   * Public Util Api\n   * --------------------------------------------------------------------------\n   */\n\n  let Util = {\n\n    TRANSITION_END: 'bsTransitionEnd',\n\n    getUID(prefix) {\n      do {\n        /* eslint-disable no-bitwise */\n        prefix += ~~(Math.random() * MAX_UID) // \"~~\" acts like a faster Math.floor() here\n        /* eslint-enable no-bitwise */\n      } while (document.getElementById(prefix))\n      return prefix\n    },\n\n    getSelectorFromElement(element) {\n      let selector = element.getAttribute('data-target')\n\n      if (!selector) {\n        selector = element.getAttribute('href') || ''\n        selector = /^#[a-z]/i.test(selector) ? selector : null\n      }\n\n      return selector\n    },\n\n    reflow(element) {\n      return element.offsetHeight\n    },\n\n    triggerTransitionEnd(element) {\n      $(element).trigger(transition.end)\n    },\n\n    supportsTransitionEnd() {\n      return Boolean(transition)\n    },\n\n    typeCheckConfig(componentName, config, configTypes) {\n      for (let property in configTypes) {\n        if (configTypes.hasOwnProperty(property)) {\n          let expectedTypes = configTypes[property]\n          let value         = config[property]\n          let valueType\n\n          if (value && isElement(value)) {\n            valueType = 'element'\n          } else {\n            valueType = toType(value)\n          }\n\n          if (!new RegExp(expectedTypes).test(valueType)) {\n            throw new Error(\n              `${componentName.toUpperCase()}: ` +\n              `Option \"${property}\" provided type \"${valueType}\" ` +\n              `but expected type \"${expectedTypes}\".`)\n          }\n        }\n      }\n    }\n  }\n\n  setTransitionEndSupport()\n\n  return Util\n\n})(jQuery)\n\nexport default Util\n"]}