JavaScript provides two different methods to manage timer on any web page.


1 setInteval(function(){},time);

2 clearInterval()


<!DOCTYPE html>
<html>
<head>
<title></title>
<script>
// Set the date we're counting down to
var countDownDate = new Date("OCT 5, 2019 20:18:00").getTime();

// Update the count down every 1 second
var x = setInterval(
function() {

  // Get today's date and time
  var now = new Date().getTime();

  // Find the distance between now and the count down date
  var distance = countDownDate - now;

  // Time calculations for days, hours, minutes and seconds
  var days = Math.floor(distance / (1000 * 60 * 60 * 24));
  var hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
  var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
  var seconds = Math.floor((distance % (1000 * 60)) / 1000);

  // Display the result in the element with id="demo"
  document.getElementById("demo").innerHTML = days + "d " + hours + "h "
  + minutes + "m " + seconds + "s ";

  // If the count down is finished, write some text
  if (distance < 0) {
    clearInterval(x);
    document.getElementById("demo").innerHTML = "EXPIRED";
  }
}, 1000);
</script>
</head>
<body>
<div id="demo"></div>
</body>
</html>


Second Example of Timer Code to Create Slider prefer this link

           






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