Backbone.js collection.url()

The Backbone.js collection url method is used to create an instance of the collection and displays where resource is located.

Syntax:

Let's take an example to deploy the url method.

See this example:

 <!DOCTYPE html>
   <head>
      <title>URL Collection 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 MyModel = Backbone.Model.extend({});  ////'MyModel' is a model name

         //The 'MyCollection' is an instance of the collection
         var MyCollection = Backbone.Collection.extend({
            model: MyModel   //The model 'MyModel' is specified by overriding the "model" property
         });

         //The model "MyBlog" contains default values for 'user' and 'myposts' attributes
         var MyBlog = Backbone.Model.extend({
            defaults: {
            user: null,
            myposts: []
         },
         initialize: function () {
            var myval = this;

            //Model 'MyModel' gets the 'user' and 'myposts' from the model 'MyBlog' by referring to the current object
            this.MyModel = new MyModel(this.get('user'));
            this.posts = new MyCollection(this.get('myposts'));
            this.posts.url = function () {
               return myval.url() + '/myposts';
            };
         },

         //It enables the url() function by using the id attribute to generate the URL as "/MyBlog/50/myposts/26"
         urlRoot: '/MyBlog/'
         });
         var attributes = {
            id: 50,
            myposts:[{id: 26}]
         }

         //The model "MyBlog" will access the attributes and display the url using 'url()' function
         val = new MyBlog(attributes);
         val.posts.each(function (MyModel) {
            document.write("The url pattern is: ",MyModel.url());
         });
         </script>
         </body>
      </html>

Test it Now

Output:

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