Function dispatchEvent

history.js:781–813

* Wrapper for the methods 'dispatchEvent/fireEvent' in the context of the 'window' * * @param {Event|String} event Instance of Event or event type string if 'eventObject' used * @param {*} [eventObject] For Internet Explorer 8 required event object on this argument * @return {Boolean} If

(event, eventObject)

   * @return {Boolean} If 'preventDefault' was called the value is false, else the value is true.
   */
  function dispatchEvent(event, eventObject) {
    var eventType = ('' + (typeof event === "string" ? event : event.type)).replace(/^on/, '');
    var list = eventsList[eventType];
    if (list) {
      // need to understand that there is one object of Event
      eventObject = typeof event === "string" ? eventObject : event;
      if (eventObject.target == null) {
        // need to override some of the properties of the Event object
        for(var props = ['target', 'currentTarget', 'srcElement', 'type']; event = props.pop();) {
          // use 'redefineProperty' to override the properties
          eventObject = redefineProperty(eventObject, event, {
            get: event === 'type' ? function() {
              return eventType;
            } : function() {
              return global;
            }
          });
        }
      }
      if (triggerEventsInWindowAttributes) {
        // run function defined in the attributes 'onpopstate/onhashchange' in the 'window' context
        ((eventType === 'popstate' ? global.onpopstate : global.onhashchange)
          || emptyFunction).call(global, eventObject);
      }
      // run other functions that are in the list of handlers
      for(var i = 0, len = list.length; i < len; i++) {
        list[i].call(global, eventObject);
      }
      return true;
    } else {
      return dispatch(event, eventObject);
    }
  }

  /**
   * dispatch current state event