我可以用Javascript为我创建的对象创建自定义事件吗?

一个简单的例子:

function Object1() {
    'use strict';

    this.me = new Image(10, 10);
    this.me.src = "someImgUrl.jpg";
    this.publish = function() {
        if (typeof this.onPublish === "function") {
            setTimeout(this.onPublish, 1);
        }

        return this.me;
    };
}

var Obj1 = new Object1();
Obj1.onPublish = function() {
  // do stuff
};

Obj1.publish();

或者,您可以使用一些第三方框架(例如 bob.js )在对象上定义自定义事件。有两种方法,但我只展示一种:

var DataListener = function() { 
    var fire = bob.event.namedEvent(this, 'received'); 
    this.start = function(count) { 
        for (var i = 0; i < count; i++) { 
            fire(i + 1); 
        } 
    }; 
}; 
var listener = new DataListener(); 
listener.add_received(function(data) { 
    console.log('data received: ' + data); 
}); 
listener.start(5); 
// Output: 
// data received: 1 
// data received: 2 
// data received: 3 
// data received: 4 
// data received: 5