JSFiddle - React, Tailwind, and code Playground

HTML

<input id="in" type="text"/>
<div id="out"></div>

JavaScript

//setup before functions
var typingTimer;                //timer identifier
var doneTypingInterval = 1000;  //time in ms, 5 second for example

//on keyup, start the countdown
$('#in').keyup(function(){
    clearTimeout(typingTimer);
    if ($('#in').val) {
        typingTimer = setTimeout(function(){
            //do stuff here e.g ajax call etc....
             var v = $("#in").val();
             $("#out").html(v);
        }, doneTypingInterval);
    }
});