项目在微信商城里做了个秒杀活动，写了一段倒计时代码，虽然不是啥高端技术，还是分享一下。代码如下：
<!DOCTYPE html>
<html>
<head>
<title></title>
<style type="text/css">
html,body,div,p{margin:0;padding:0;}
.content{width: 500px;height: 200px;margin:0 auto; line-height: 200px;font-size:20px;}
</style>
</head>
<body>
<div class="content">
<span>距离2020年元旦还有</span>
<span id="d">00</span>天
<span id="h">00</span>时
<span id="m">00</span>分
<span id="s">00</span>秒
</div>
</body>
<script type="text/javascript">
var d,h,m,s;
function go(){
//获取当前时间，换算成毫秒
var date = new Date();
var now = date.getTime();
//获取截止时间，换算成毫秒
var endData = new Date('2020-01-01 00:00:00');
var end = endData.getTime();
//计算时差毫秒
var time = end - now;
if(time>0){
d = Math.floor(time/1000/60/60/24);
h = Math.floor(time/1000/60/60%24);
m = Math.floor(time/1000/60%60);
s = Math.floor(time/1000%60);
document.getElementById("d").innerHTML = d;
document.getElementById("h").innerHTML = h;
document.getElementById("m").innerHTML = m;
document.getElementById("s").innerHTML = s;
setTimeout(go,1000);
}
}
go();
</script>
</html>