set timeout n cleartimout in js code example

Example 1: clear timeout js

The clearTimeout() method of the WindowOrWorkerGlobalScope mixin cancels a timeout previously established by calling setTimeout().

Example 2: clear timeout in function js

var timer;
function endAndStartTimer() {
  window.clearTimeout(timer);
  var millisecBeforeRedirect = 10000; 
  timer = window.setTimeout(function() {
    alert('Hello!');
  }, millisecBeforeRedirect); 
}