Plain JS countdown timer. Read the time from that particular element and replaces with a count down in that same element

countdown.js

  jQuery(document).ready(function(){
      if(jQuery(".countdown h3 span") === 0 ){
          return;
      }

      jQuery(".countdown h3 span").each(function(){
              // Set the date we're counting down to
              var element = jQuery(this);
              var countDownDate = new Date(jQuery(this).text()).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"
                  element.text(days + "d " + hours + "h " + minutes + "m " + seconds + "s ");
                  // If the count down is finished, write some text
                  if (distance < 0) {
                      clearInterval(x);
                      element.text();
                      element.text("EXPIRED");
                  }
              }, 1000);

      });





  });