Backbone.js collection.where()

The Backbone.js collection where method retrieves and display the model by using the matched attribute in the collection.

Syntax:

Parameter explanation:

attributes: It specifies the property of a defined model.

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

See this example:

<!DOCTYPE html>
   <head>
      <title>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 players = new Backbone.Collection([
  {name: "Sachin",      job: "Cricketer"},
  {name: "Dhoni",    job: "Cricketer"},
  {name: "Bradman",     job: "Cricketer"},
  {name: "Ronaldo", job: "Footballer"},
]);

var Cricketer = players.where({job: "Cricketer"});
document.write("Total numbers of items that matches given attribute are:", +Cricketer.length);

      </script>
   </body>
</html>

Test it Now

Output:

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