How to Create: JavaScript Countdown Timer

Create a Countdown Timer

Example

<!-- Display the countdown timer in the element -->
<p id="demo"></p>
<script>
// Set the date we want to countdown to
var countDownDate = new Date("Jan 5, 2024 15:37:25").getTime();
// Update the countdown every 1 second
var x = setInterval(function() {
  // Get today's date and time
  var now = new Date().getTime();
  // Calculate the distance between the current time and the countdown date
  var distance = countDownDate - now;
  // Calculate 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 countdown ends, write some text.
  if (distance < 0) {
    clearInterval(x);
    document.getElementById("demo").innerHTML = "EXPIRED";
  }
, 1000);
</script>

Try It Yourself

Related Pages

Reference Manual:JavaScript window.setInterval() method