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BackboneJS - Event stopListening
Description
As its name specifies, it can be used to stop listening to events on the other objects.
Syntax
object.stopListening(other, event, callback)
Parameters
other − It defines name of the other object.
event − It binds an object.
callback − It is reference to the code and called with object as context.
Example
<!DOCTYPE html> <html> <head> <title>Event Once 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"> // Create an object 'myVal' and 'myVal1' and extend them using Backbone.Events method var myVal = _.extend({name:'Hello..'}, Backbone.Events); var myVal1 = _.extend({name:'Welcome to TutorialsPoint..'}, Backbone.Events); // created the 'listenMe' callback function and invoked when one object // listens to particular event on another object var listenMe = function() { document.write("The value is: "); document.write(this.name); }; // The object 'myVal1' listens once for the 'listenMe' event triggered on object 'myVal' myVal1.listenTo(myVal, 'listenMe', listenMe); // The 'myVal' has no 'listenMe' event and display the value of 'myVal1' myVal.trigger('listenMe'); // The 'myVal1' stops listening to specific event on 'myVal' and displays nothing myVal1.stopListening(myVal,'listenMe'); myVal.trigger('listenMe'); </script> </body> </html>
Output
Let us carry out the following steps to see how the above code works −
Save the above code in stoplistening.htm file.
Open this HTML file in a browser.
backbonejs_events.htm
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