The Backbone.js event trigger method invokes the callback functions for the mentioned events.
Syntax:
object.trigger(event, arg)
Parameters:
event: This parameter is used to specify the event whose binding with an object is needed.
arg: It is an optional parameter that is used to specify the values or arguments to be passed to the callback function.
Example:
<!DOCTYPE html>
<html>
<head>
<title>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 X = _.extend({msg:'Hello World'}, Backbone.Events);
X.on('func', function () {
document.write("Triggered message: ");
document.write(this.msg);
});
X.trigger('func');
</script>
</body>
</html>
Explanation:
The on() method will bind the event to an object. The trigger() method will than invoke the function which will execute in return and thus the message will be displayed.