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<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<meta name=”description” content=”Backbone.js tutorial code sample”>  
<link rel=”author” href=”https://plus.google.com/u/0/+ArvindRavulavaru“/>
<title>Backbone.js Tutorial - Arvind Ravulavaru</title>
  
</head>
<body>
  
  
  <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
  <script type="text/javascript" src="http://documentcloud.github.com/underscore/underscore-min.js"></script>
  <script type="text/javascript" src="http://documentcloud.github.com/backbone/backbone-min.js"></script>  
</body>
</html>
 
var Todo = Backbone.Model.extend({
  defaults: {
    title: '',
    completed: false
  },
  initialize: function(){
    console.log('This model has been initialized.');
    this.bind('change', function(){
        console.log('Values for this model have changed.');
    });
  }
});
​
var myTodo = new Todo();
​
myTodo.set({'title': 'The listener is triggered whenever an attribute value changes.'});
console.log('Title has changed: ' + myTodo.get('title'));
​
​
myTodo.set({'completed': true});
console.log('Completed has changed: ' + myTodo.get('completed'));
​
myTodo.set({
  title: 'Changing more than one attribute at the same time only triggers the listener once.',
  completed: true
});
​
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