Display a countdown timer

countdown.js

// Set the date we're counting down to

var obj = document.getElementById("tbe-countdown");
var date = obj.getAttribute("data-date");

if (!date || date == "") {
  console.error("Date should be of formate: Mon d, YYYY HH:mm:ss");
}

var countDownDate = new Date(date).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);
    
  // Output the result in an element with id="demo"
  var timerString = '';
  if (days) {
  	timerString += "<span class='days'>" + days + "d </span>";
  }
  if (hours) {
    timerString += "<span class='hours'>" + hours + "h </span>";
  }
  if (minutes) {
  	timerString += "<span class='minutes'>" + minutes + "m </span>";
  }
  if (seconds) {
  	timerString += "<span class='seconds'>" + seconds + "s </span>";
  }
  obj.innerHTML =  timerString;
    
  // If the count down is over, write some text 
  if (distance < 0) {
    clearInterval(x);
    obj.innerHTML = "EXPIRED";
  }
}, 1000);