Answer by JohnP for Run function after user has stopped typing

var timer = null;    $('#text').keyup(function(){           clearTimeout(timer);            timer = setTimeout(doStuff, 1000)    });    function doStuff() {        alert('do stuff');    }

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script><input type='text' id='text'>