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Backbone.JS View Extend()

The Backbone.JS View Extend() method extends the backbone’s View class to create a custom view class.

Syntax:

Backbone.View.extend (properties, classProperties)   

Parameters:
properties: This parameter is used to specify the properties for instance for the View class.
classProperties: This parameter is used to specify the class properties for the constructor function of the View.

Example:

<!DOCTYPE html>  
<html>
<head>  
<title>Example</title>  
<script src="https://code.jquery.com/jquery-2.1.3.min.js" type="text/javascript"></script>  
<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.2/underscore-min.js" 
type="text/javascript"></script>  
<script src="https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.1.2/backbone-min.js" 
type="text/javascript"></script>  
</head>  
<body>  
<script type="text/javascript">  
var X = Backbone.View.extend({  
initialize:function(){  
document.write('HELLO WORLD!!');  
}  });  
var Y = new X();  
</script>  
</body>  
</html>

Output:

HELLO WORLD!!

Explanation:
In the above example the Extend() method is used to extend the backbone’s View class.

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