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Backbone.js id Model

Last Updated : 23 Jul, 2025
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The Backbone.js id model is used to identify the unique identifier in a model. We can set it manually and later it is stored in a server.

Syntax:

Backbone.Model.id

Parameters: It does not accept any parameter.

Using the CDN Link: A content delivery network is a network that serves files to users. Here are the CDNs for Backbone.js

<script src=”https://code.jquery.com/jquery-2.1.3.min.js%E2%80%9D type=”text/javascript”></script>  
<script src=”http://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.3.3/underscore-min.js%E2%80%9D type=”text/javascript”></script>  <script src=”http://cdnjs.cloudflare.com/ajax/libs/backbone.js/0.9.2/backbone-min.js%E2%80%9D type=”text/javascript”></script>

Example 1: This example specifies the bookid as a unique identifier in the book model.

HTML 
<!DOCTYPE html>
<html>

<head>
    <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 Books = Backbone.Model.extend();
        var book = new Books({ 
            bookid: 23, 
            price: 678, 
            book_name: 'php' 
        });
        
        document.write("ID: ", book.get('bookid'));  
    </script>
</head>

<body></body>

</html>

Output:

ID: 23

Example 2: This example specifies the book_name as a unique identifier in the book model.

HTML 
<!DOCTYPE html>
<html>

<head>
    <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 Books = Backbone.Model.extend();
        var book = new Books({ 
            bookid: 23, 
            price: 678, 
            book_name: 'php' 
        });
        
        document.write("Name: ", book.get('book_name'));  
    </script>
</head>

<body></body>

</html>

Output:

Name: php

S

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