prependOnceListener #

Adds a one-time listener function for an event to the beginning of the listeners array.
The next time that event is triggered, this listener is removed, and then invoked.

Arguments #

prependOnceListener(eventName, callback);

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

Return #

The KuzzleEventEmitter instance.

Usage #

const eventEmitter = new KuzzleEventEmitter();
eventEmitter.addListener('myEvent', () => console.log('listener1'));
eventEmitter.prependOnceListener('myEvent', () => console.log('listener2'));
// Prints:
//   listener2
//   listener1
eventEmitter.emit('myEvent');
// Prints: listener1
// (the listener function printing "listener2" as since been removed)
eventEmitter.emit('myEvent');

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