Run function after user has stopped typing

This is really late, I know, but I really disliked the lines of code needed to achieve this every time it was needed, so I extracted the logic into a page initiation function that only runs once.

(function(){
    var keystoppedTimer = null;
    var keystoppedInputs = document.getElementsByTagName('input');
    for (var i = 0, l = keystoppedInputs.length; i < l; i++) {
        keystoppedInputs[i].addEventListener('keydown', function(event){
            clearTimeout(keystoppedTimer);
            keystoppedTimer = setTimeout(function() {
                event.target.dispatchEvent( new Event('keystopped') );
            }, 600);
        }, false);
    }
}());

Adding this (think of it as a polyfill), allows for much simpler usage. All you need to do to target the user stopping typing is add an event listener to your element targeting 'keystopped'.

inputElement.addEventListener('keystopped', function(event){
    console.log('Stopped typing');
}, false);

I picked keystopped because it matches keydown, keyup, etc.

Here's a rough draft : http://jsfiddle.net/jomanlk/msmJp/

Uses setTimeout and clearTimeout

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'>

Use the bindWithDelay jQuery plugin:

element.bindWithDelay(eventType, [ eventData ], handler(eventObject), timeout, throttle)