Backbone.js Collection Remove

The Backbone.js collection remove is used to remove a model or an array of models from the collection.

Syntax:

Parameter explanation:

models: It specifies the names of the collection instances, which are need to be removed from the collection.

options: It contains model type which will be removed from the collection.

Let's take an example.

See this example:

 <!DOCTYPE html>
   <head>
      <title>Remove 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">
         //'Player' is a model and contain defualt value for model
         var Player = Backbone.Model.extend({
            defaults: {
               name: "Sachin",
               country:"India"
            }
         });

         //The 'PlayersCollection' is a collection instance and model 'Player' is specified by overriding the 'model' property
         var PlayersCollection = Backbone.Collection.extend({
            model: Player
         });

         //The instances "player1" and "player2" are created for the model "Player"
         var player1 = new Player({name: "Dravid",  country:"India"});
         var player2 = new Player({name: "Ganguly",  country:"India"});

         //The add() method adds the models 'player1' and 'player2' to the collection instance 'mycollection'
         var mycollection = new PlayersCollection();
         mycollection.add([player1,player2]);

          //The 'length' property deteremines length of the collection
         document.write('Number of added players : ' + mycollection.length);
         document.write("<br>");

         //The remove() method removes the 'player1' model from the collection
         mycollection.remove([player1]);
         document.write('Number of removed players : ' + mycollection.length);
      </script>
   </body>
</html>

Test it Now

Output:

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