i'm trying to create a simple class to emit an event in certain moment. I get this javascript error : this.emit is not a function

This is the code:

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);

Any suggestion?,Thanks!

i'm trying to create a simple class to emit an event in certain moment. I get this javascript error : this.emit is not a function

This is the code:

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);

Any suggestion?,Thanks!

• javascript
• jquery
• events

Share Improve this question Follow asked Mar 14, 2014 at 14:31 hanskaithanskait 4511 silver badge99 bronze badges 4

• 2 That code is not using jQuery at all. – Frédéric Hamidi Commented Mar 14, 2014 at 14:32
• @FrédéricHamidi the class is wrong? – hanskait Commented Mar 14, 2014 at 14:38
• @hanskait: Do you know what jQuery is? And emit() es from NodeJS. Is that what you're using? – cookie monster Commented Mar 14, 2014 at 14:40
• 1 @hanskait, well, it does not have the emit() method you're trying to call. If you wish to emit events with jQuery, I would suggest you use the library (on() instead of addEventListener() for instance) and refer to the trigger() method. – Frédéric Hamidi Commented Mar 14, 2014 at 14:41

Add a ment  | 

1 Answer 1

Sorted by: Reset to default 5

with jQuery ,since you requested it :

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');