util.js

/**
 * --------------------------------------------------------------------------
 * Bootstrap (v4.0.0): util.js
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 * --------------------------------------------------------------------------
 */

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

'use strict';

var Util = {

  TRANSITION_END: 'bsTransitionEnd',

  getUID: function getUID(prefix) {
    do prefix += ~ ~(Math.random() * 1000000); while (document.getElementById(prefix));
    return prefix;
  },

  getSelectorFromElement: function getSelectorFromElement(element) {
    var selector = element.getAttribute('data-target');

    if (!selector) {
      selector = element.getAttribute('href') || '';
      selector = /^#[a-z]/i.test(selector) ? selector : null;
    }

    return selector;
  },

  reflow: function reflow(element) {
    new Function('bs', 'return bs')(element.offsetHeight);
  },

  supportsTransitionEnd: function supportsTransitionEnd() {
    return !!transition;
  }

};

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

var transition = false;

var TransitionEndEvent = {
  WebkitTransition: 'webkitTransitionEnd',
  MozTransition: 'transitionend',
  OTransition: 'oTransitionEnd otransitionend',
  transition: 'transitionend'
};

function getSpecialTransitionEndEvent() {
  return {
    bindType: transition.end,
    delegateType: transition.end,
    handle: function handle(event) {
      if ($(event.target).is(this)) {
        return event.handleObj.handler.apply(this, arguments);
      }
    }
  };
}

function transitionEndTest() {
  if (window.QUnit) {
    return false;
  }

  var el = document.createElement('bootstrap');

  for (var name in TransitionEndEvent) {
    if (el.style[name] !== undefined) {
      return { end: TransitionEndEvent[name] };
    }
  }

  return false;
}

function transitionEndEmulator(duration) {
  var _this = this;

  var called = false;

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

  setTimeout(function () {
    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();

/**
 * ------------------------------------------------------------------------
 * Export Api
 * ------------------------------------------------------------------------
 */
//# sourceMappingURL=util.js.map