JsAction是一個微小的事件委托庫，允許解耦 JavaScript 代碼中處理 action 的 DOM 節點。添加事件處理器傳統的方式就是獲取節點的引用，然后添加到事件處理它。JsAction 允許用戶通過自定義的 HTML 屬性 jsaction 映射事件和這些事件處理器的名字。

用

In the DOM

Actions are indicated with the jsaction attribute. They are separated by ;, where each one takes the form:

[eventType:]<namespace>.<actionName>

If an eventType is not specified, JsAction will assume click.

<div id="foo"
     jsaction="leftNav.clickAction;dblclick:leftNav.doubleClickAction">
  some content here
</div>

In JavaScript

Set up

var eventContract = new jsaction.EventContract;

// Register the event types we care about.
eventContract.addEvent('click');
eventContract.addEvent('dblclick');

var dispatcher = new jsaction.Dispatcher;

eventContract.dispatchTo(goog.bind(dispatcher.dispatch, dispatcher));

Register individual handlers

/**
 * Do stuff when actions happen.
 * @param {!jsaction.ActionFlow} flow Contains the data related to the action
 *     and more. See actionflow.js.
 *
 */
myapp.LeftNav.prototype.doStuff = function(flow) {
  // do stuff
};

myapp.LeftNav.prototype.registerHandlers = function() {
  dispatcher.registerHandlers(
      'leftNav',                       // the namespace
      this,                            // handler object
      {                                // action map
        'clickAction' : this.doStuff,
        'doubleClickAction' : this.doStuff
      });
};

項目主頁：http://www.baiduhome.net/lib/view/home/1401086490277