addListener #

Adds a listener function to the end of the listeners array for an event.
Whenever an event is triggered, listener functions are called in the order they were registered.

Arguments #

addListener (eventName, callback);

Argument	Type	Description
`eventName`	string	The name of the event
`callback`	function	Function to call every time the event is triggered

Return #

The KuzzleEventEmitter instance.

Usage #

const eventEmitter = new KuzzleEventEmitter();
eventEmitter.addListener("myEvent", () =>
  console.log('Caught event "myEvent"!'),
);
// Prints: Caught event "myEvent"!
eventEmitter.emit("myEvent");