timer - 倒数计时器不倒计时

Question

<script>
var countDownDate = new Date("Jan 1, 2019 00:00:00").getTime();
var x = setInterval(function() {
    var now = new Date().getTime();
    var distance = countDownDate - now;
    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);
    document.getElementById("launch").innerHTML = days + "d " + hours + "h " + minutes + "m " + seconds + "s ";

   if (distance < 0) {
       clearInterval(x);
       document.getElementById("launch").innerHTML = "EXPIRED"
   }      
}, 1000);
</script>

标签： timercountdown