Backbone.js model.idAttribute()

The Backbone.js IdAttribute model gives us the model's unique identifier which contains the name of the class member that will be used as id.

Syntax:

Let's take an example.

See this example:

 <!DOCTYPE html>
   <head>
      <title> idAttribute 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: {
                  idAttribute: 'id'
               }
            });
            var person = new Person({id:5, name:"Albert Pinto"});
            document.write("<b>Unique indentifier of Model Person is:</b> ", person.idAttribute);
         </script>
   </head>
</html>

Test it Now

Output:

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