Backbone.js model.defaults()

The Backbone.js defaults model is used to set a default value to a model. It ensures that if a user doesn't specify any data, the model would not fall with empty property.

Syntax:

Let's take an example.

See this example:

 <!DOCTYPE html>
   <head>
      <title> Default 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>
         <script type="text/javascript">
            var  Person = Backbone.Model.extend({
            defaults : {
               "title": "Hello",
               "description": "JavaTpoint- A solution of all technology."
            }
            });
            var person = new Person();
            document.write(person.get('description'));
         </script>
   </head>
   <body></body>
</html>

Test it Now

Output:

Save the above code in default.html file and open this file in a new browser.