feat(xhr): add all properties of Event class

Author: zollqir

python/pythonmonkey/builtin_modules/event-target.js

@@ -13,14 +13,68 @@
 class Event
 {
   /**
-   * The name identifying the type of the event.
+   * Indicates whether the event bubbles up through the DOM tree or not.
+   * @type {Boolean}
    */
-  type = '';
+  bubbles = false;
+
+  /**
+   * Indicates whether the event is cancelable.
+   * @type {Boolean}
+   */
+   cancelable = true;
 
   /**
+   * Indicates whether the event can bubble across the boundary between the shadow DOM and the regular DOM.
+   * @type {Boolean}
+   */
+   composed = false;
+  
+  /**
+   * The element to which the event handler has been attached.
    * @type {EventTarget}
    */
-  target = null;
+   currentTarget = null;
+
+  /**
+   * Indicates whether the call to event.preventDefault() canceled the event.
+   * @type {Boolean}
+   */
+   devaultPrevented = false;
+
+  /**
+   * Indicates which phase of the event flow is currently being evaluated.
+   * @type {Number}
+   */
+   eventPhase = Event.NONE;
+   static NONE = 0;             // The event is not being processed
+   static CAPTURING_PHASE = 1;  // The event is being propagated through the target's ancestor objects 
+   static AT_TARGET = 2;        // The event has arrived at the event's target
+   static BUBBLING_PHASE = 3;   // The event is propagating back up through the target's ancestors in reverse order, starting with the parent
+  
+  /**
+   * Indicates whether the event was initiated by the browser or by a script.
+   * @type {Boolean}
+   */
+   isTrusted = false;
+  
+  /**
+   * A reference to the object to which the event was originally dispatched.
+   * @type {EventTarget}
+   */
+   target = null;
+  
+  /**
+   * The time at which the event was created (in milliseconds). By specification, this value is time since epoch.
+   * @type {Number}
+   */
+   timeStamp = null;
+
+  /**
+   * The name identifying the type of the event.
+   * @type {String} 
+   */
+  type = '';
 
   /**
    * @param {string} type A string with the name of the event.