根据服务器时间创建倒计时

Question

我需要创建一个倒计时以在某个促销结束时显示，我所拥有的只是通过 google 标签管理器进行前端访问，首先我设法获得服务器hour with js，现在我需要根据服务器时间而不是本地时间来设置倒计时时间。

 <script>
  // it´s giving the correct hour
  var getserver = new Date();
 getserver.setHours(getserver.getHours());
 var newtets = getserver.toUTCString();
 alert(newtets);



 // using a basic countdown
   var countDownDate = new Date("Sep 5, 2018 15:37:25").getTime();

  // Update the count down every 1 second
 var x = setInterval(function() {

// Get todays date and time
var now = new Date().getTime();
/* 
 var now = new Date();
now.setHours(now.getHours());
var newnow = now.toUTCString();
i tried to replace now with newnow but is not working, how can i transform this
*/


// Find the distance between now an 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"
document.getElementById("demo").innerHTML = days + "d " + hours + "h "
+ minutes + "m " + seconds + "s ";

// If the count down is over, write some text 
if (distance < 0) {
    clearInterval(x);
    document.getElementById("demo").innerHTML = "EXPIRED";
  }
}, 1000);

</script>

var now = new Date().getTime();是什么得到时间并用它来倒计时，这是当地时间，我怎样才能得到 var now = new Date().getTime();是服务器小时，这是我用 1 个脚本

获得的

Answer 1

获取更新服务器时间的唯一方法是使用 ajax 调用。问题是对服务器的请求不是立即的，所以你会有延迟。

也许获取用户时区并计算以此信息结尾的促销会更好。

您可以使用以下方法获取用户时区偏移量：

var offset = new Date().getTimezoneOffset();

根据服务器时间创建倒计时

create countdown based on server hour

javascript

jquery

countdown