BackboneJS-View setElement

Quiz

Description

If you'd like to apply a Backbone view to a different DOM element, use setElement, which will also create the cached $el reference and move the view's delegated events from the old element to the new one.

Syntax

view.setElement(element)

Parameters:

element: It is the element which can be changed from existing element to different element.

Example

<!DOCTYPE html>
   <head>
      <title>View 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>
      <div id="myview">
   	     Enter your text: <input type="text"/>
      </div>
      <div id="myapp"></div>
      <script type="text/javascript">
         //'ViewDemo' is a name of the view class
         var ViewDemo = Backbone.View.extend({

            //Event triggers 'sayHi' function when you enter the text in input tag
            events: {
               'change input': 'sayHi'
            },

            //This function is called when the view is instantiated
            initialize: function() {
                this.setElement($('#myview'));   //'setElement' changes the element associated with the view
            },

            //when you enter the text, it displays the below line on the screen
            sayHi: function() {
               document.write('Welcome to Tutorialspoint!!!');
            }
         });

          //'viewdemo' is a instance of the 'ViewDemo' class
         var viewdemo = new ViewDemo;
      </script>
   </body>
</html>

Output

Let's carry out the following steps to see how above code works:

Save above code in setElement.htm file
Open this HTML file in a browser.

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