Question

I am learning backbone. I am trying to use on event for change. But it gives me this error Uncaught TypeError: Object function (){ parent.apply(this, arguments); } has no method 'on' on line 6. Below is my code

$(function () {
var ford = new Backbone.Model.extend({
    type: 'car',
    color: 'blue'
});
ford.on('change', function () {
    console.log('something changed');
});
ford.set('type', 'truck');
});

How can I make this work?

Answer 1

You haven’t created an instance of ford yet. Do something like

var f = new ford();

and then have another function listen to its ‘change‘ event.

f.on('change', function () {
    console.log('something changed');
});

Here, extend is used to create a constructor function. You have to create objects to bring the model to life.