Question

我试图创建一个简单的类来在某个时刻发出事件。我得到这个javascript错误：this.emit不是函数

这是代码：

var class_test = function(){};
class_test.prototype = {
   some_property: null,

    doSomething: function(msg) {
            this.some_property = msg;
            this.emit("somethingHappened");
        }
};


var test = new class_test();
test.doSomething('Example');

test.addEventListener('somethingHappened',function(){
    alert("Event");
},false);

有什么建议吗？谢谢！

Answer 1

使用jQuery，因为你提出了它：

var class_test = function(){
   this.dispatcher = $({});
};
class_test.prototype = {
   some_property: null,

    doSomething: function(msg) {
            this.some_property = msg;
            this.dispatcher.trigger("somethingHappened");
        }
};


var test = new class_test();


test.dispatcher.on('somethingHappened',function(){
    alert("Event");
});

test.doSomething('Example');

如何使用jquery发出事件？

1 个答案: