Backbone.js trigger Event is used to invoke or callback the function for the given event or a space-delimited list of events. The subsequent arguments will be passed along to the event callbacks in order to trigger it.
Syntax:
object.trigger(event, [*args])
Parameter Values:
- event: It is used to bind an object with an event.
- args: It is used to pass values or arguments to the callback function.
Example: This example describes the trigger event in Backbone.js.
HTML
<!DOCTYPE html> <html>   <head>     <title>Backbone.js trigger Event</title>     <script src=         "https://code.jquery.com/jquery-2.1.3.min.js"         type="text/javascript">     </script>     <script src=          type="text/javascript">     </script>     <script src=          type="text/javascript">     </script> </head>   <body>     <h1 style="color: green;">         neveropen     </h1>           <h3>Backbone.js trigger Event</h3>           <script type="text/javascript">         var gfgVar = _.extend({             title: 'neveropen',             site:         }, Backbone.Events);               gfgVar.on('gfgFunc', function () {             document.write(`This is `                 + this.title                 + ` & is the triggered value for site is: `                 + this.site);         });               gfgVar.trigger('gfgFunc');     </script> </body>   </html> |
Here, the _.extend() function is used to create a copy of all of the properties of the source objects over the destination object and return the destination object.
Output:
Example: This example describes the Backbone.js trigger Event using the <iframe> tag.
HTML
<!DOCTYPE html> <html>   <head>     <title>Backbone.js Event trigger Event</title>         type="text/javascript">     </script>     <script src=         type="text/javascript">     </script>     <script src=         type="text/javascript">     </script> </head>   <body>     <h1 style="color: green;">         neveropen     </h1>           <h3>Backbone.js trigger Event</h3>           <script type="text/javascript">         var gfgVar = _.extend({             title: 'neveropen',             site: `<iframe src=                 "https://www.geeksforgeeks.org/"                height="200"                width="400">                </iframe>`,         }, Backbone.Events);           gfgVar.on('gfgFunc', function () {             document.write(this.title                 + ` website is placed inside the iframe<br>`                 + ` & is the triggered value for site is: <br>`                 + this.site);         });           gfgVar.trigger('gfgFunc');     </script> </body>   </html> |
Output:
Reference: https://backbonejs.org/#Events-trigger
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