Delayed function execution after the last invocation of an event handler

delayed-event-handler.js

let timerId = null
const delay = 2000

function delayedHandler() {
	console.log('Hello, World!')
}

function onEvent() {
	if(timerId) {
		clearTimeout(timerId)
		timerId = null
	}
	timerId = setTimeout(delayedHandler, delay)
}