detect a pause on writting on input withpout key up code example

Example 1: stopped typing jquery

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

function doStuff() {
    alert('do stuff');
}

Example 2: run javascript when typing

<input type="text" oninput="myFunction()">