eventdispatcher.js-example

<script src="EventDispatcher.js"></script>
<script>

    // Adding events to custom object

    function Car() {

        this.start = function () {

            this.dispatchEvent( { type: 'start', message: 'vroom vroom!' } );

        };

    }

    Object.assign( Car.prototype, EventDispatcher.prototype );

    // Using events

    var car = new Car();

    car.addEventListener( 'start', function ( event ) {

        alert( event.message );

    } );

    car.start();

</script>

捕获.PNG