BackboneJS - Event Off

BackboneJS - Event Off

<!DOCTYPE html>
<html>

   <head>
      <title>Event Off 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">
         //Here creating an object 'myVal' and extending with Backbone.Events method
         var myVal = _.extend({name:'hello'}, Backbone.Events);

         var myFunc = function () {
            document.write('Hello');
         };
         var myFunc1 = function () {
            document.write('Welcome to CodingDict');
         };

         //The on() method will bind the callback function to objects 'myFunc' and 'myFunc1'
         myVal.on('log',myFunc);
         myVal.on('log',myFunc1);
         document.write('Before using off event, values will be: ');

         //trigger() method callbacks for the given event and display the text defined
         //in the 'myFunc' and 'myFunc1' functions
         myVal.trigger('log');

         //The off() method removes the callback for 'myFunc' and logs only text of 'myFunc1'
         myVal.off('log',myFunc);

         document.write("<br>");
         document.write('After using off event, values will be: ');
         myVal.trigger('log');
      </script>

   </body>
</html>