Resolved: Trying to perform a slightly different search (Timer, event listener, event dispatch?)

Question:

1. First keyup on (search input) fires up search countdown timer and set timer to 1s.
2. Every next search keyup on (search input) reset search countdown timer to 1s.
3. When (search input) no longer updated and stay the same –
4. Search countdown timer reached 0s and performing a search.

Answer:

var timer=null;
document.getElementById("myInput").onkeyup = ()=>{
  clearInterval(timer);
  timer = setInterval(()=>{
            console.log("call ajax search function here."); 
            clearInterval(timer);
          },1000);
};

<input type="text" id="myInput">

If you have better answer, please add a comment about this, thank you!