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EventDispatcher

JavaScript events for custom objects.
EventDispatcher on GitHub

Code Example​

// Adding events to a custom object class Car extends EventDispatcher {
start() { this.dispatchEvent( { type: 'start', message: 'vroom vroom!' } ); }
}; // Using events with the custom object const car = new Car();
car.addEventListener( 'start', function ( event ) { alert( event.message ); }
); car.start();

Constructor​

EventDispatcher​

function EventDispatcher( ): void;

Creates EventDispatcher object.

Methods​

addEventListener​

function addEventListener( type: String, listener: Function ): undefined;

type - The type of event to listen to.
listener - The function that gets called when the event is fired.

Adds a listener to an event type.

hasEventListener​

function hasEventListener( type: String, listener: Function ): Boolean;

type - The type of event to listen to.
listener - The function that gets called when the event is fired.

Checks if listener is added to an event type.

removeEventListener​

function removeEventListener( type: String, listener: Function ): undefined;

type - The type of the listener that gets removed.
listener - The listener function that gets removed.

Removes a listener from an event type.

dispatchEvent​

function dispatchEvent( event: Object ): undefined;

event - The event that gets fired.

Fire an event type.

Source​

src/core/EventDispatcher.js