count down clock with days hours minutes seconds in javascript

index.tsx
// set the date and time to countdown to
var countDownDate = new Date("Dec 31, 2021 23:59:59").getTime();

// update the countdown every second
var countdown = setInterval(function() {

  // get the current date and time
  var now = new Date().getTime();

  // calculate the remaining time
  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 countdown
  console.log(days + "d " + hours + "h " + minutes + "m " + seconds + "s");

  // when the countdown is finished
  if (distance < 0) {
    clearInterval(countdown);
    console.log("COUNTDOWN FINISHED");
  }
}, 1000);
897 chars
28 lines