Registering a native JavaScript object via {{EventDispatcher}}**{{.register}}** applies kind of an **{{[EventTarget]}}** interface onto this object thus featuring immediately its 3 methods **{{[addEventListener]}}**, **{{[removeEventListener]}}** and **{{[dispatchEvent]}}**.

Attempting to register DOM-**{{[Node]}}** or DOM-**{{[Element]}}** objects as well as reregistering of objects that already do implement the {{[EventTarget]}} interface is futile.

Furthermore, this observer does not support any bubbling or capturing of events for there are no dependencies like ancestry or tree-like object hierarchies.

Furthermore, this observer does not support any DOM-level-2 event flow behavior like capture, bubbling, propagation for there are no dependencies like ancestry or tree-like object hierarchies.

Once such an object features {{[EventTarget]}} behavior every other object can subscribe itself or listen via {{[addEventListener]}} to a certain event by passing a valid type and a handler to that firstly mentioned object.

[code=javascript]/*

    link-list:

  link-list:

        English:

    English:

            [http://en.wikipedia.org/wiki/Observer_pattern]    - Observer Pattern

            [http://en.wikipedia.org/wiki/Publish/subscribe]  - publish-subscribe

            [http://en.wikipedia.org/wiki/Signals_and_slots]  - Signals and Slots

      [http://en.wikipedia.org/wiki/Observer_pattern]   - Observer Pattern

      [http://en.wikipedia.org/wiki/Publish/subscribe]  - publish-subscribe

      [http://en.wikipedia.org/wiki/Signals_and_slots]  - Signals and Slots

            [http://www.w3.org/TR/2000/REC-DOM-Level-2-Events-20001113/]

            [http://www.w3.org/TR/2000/REC-DOM-Level-2-Events-20001113/events.html]

            [http://www.w3.org/TR/2000/REC-DOM-Level-2-Events-20001113/ecma-script-binding.html]

      [http://www.w3.org/TR/2000/REC-DOM-Level-2-Events-20001113/]

      [http://www.w3.org/TR/2000/REC-DOM-Level-2-Events-20001113/events.html]

      [http://www.w3.org/TR/2000/REC-DOM-Level-2-Events-20001113/ecma-script-binding.html]

        Deutsch/German:

            [http://de.wikipedia.org/wiki/Observer_(Entwurfsmuster)]  - Observer (Entwurfsmuster) / publish-subscribe

            [http://de.wikipedia.org/wiki/Signal-Slot-Konzept]        - Signal-Slot-Konzept

    Deutsch/German:

      [http://de.wikipedia.org/wiki/Observer_(Entwurfsmuster)]  - Observer (Entwurfsmuster) / publish-subscribe

      [http://de.wikipedia.org/wiki/Signal-Slot-Konzept]        - Signal-Slot-Konzept

*/

var EventDispatcher = (function () { // [EventDispatcher] Singleton.

  return {

    register: (function (obj/*:[Object]*/) { /*:void*/ // register | sign on

    //do not apply this customized [[EventTarget]] interface to [Node] or [Element] objects or to objects that already got augmented by this customized [EventTarget] features.

    //do not apply this customized [[EventTarget]] interface to DOM-[Node] or DOM-[Element] objects or to objects that already got augmented by this customized [EventTarget] features.

      if ((typeof obj.addEventListener == "function") || obj.attachEvent || (typeof obj.removeEventListener == "function") || obj.detachEvent || (typeof obj.dispatchEvent == "function") || obj.fireEvent) {

        return;

      }

      EventTarget.call(obj); // applying the MIXIN concept - [obj] implements the [[EventTarget]] interface.