clear timeout js

var myVar;

function myFunction() {
  myVar = setTimeout(function(){ alert("Hello"); }, 3000);
}

function myStopFunction() {
  clearTimeout(myVar);
}The clearTimeout() method of the WindowOrWorkerGlobalScope mixin cancels a timeout previously established by calling setTimeout().var timer;
function endAndStartTimer() {
  window.clearTimeout(timer);
  var millisecBeforeRedirect = 10000; 
  timer = window.setTimeout(function() {
    alert('Hello!');
  }, millisecBeforeRedirect); 
}