JavaScript实现秒杀时钟倒计时

本文实例为大家分享了JavaScript实现秒杀时钟倒计时的具体代码，供大家参考，具体内容如下

功能介绍：

1.时/分/秒倒计时直至为零

JavaScript实现秒杀时钟倒计时

<!DOCTYPE html>
<html>
 <head>
 <Meta charset="utf-8" />
 <title>倒计时</title>
 <style type="text/css">
  *{
  margin:0;
  padding:0;
      }
      span{
        display: inline-block;
        width: 60px;
        height: 60px;
        border-radius: 50%;
        background: black;
        color: white;
        font-size: 30px;
        text-align: center;
        line-height: 60px;
      }
      i{
        font-style: normal;
        font-size: 20px;
      }
 </style>
 </head>
 <body>
    <span id="hs">1</span>
    <i>:</i>
    <span id="ms">59</span>
    <i>:</i>
    <span id="ss">47</span>
 </body>
</html>
<script type="text/javascript">
//倒计时
var count = 1;
var Counter;
function countDown(){ //调用
 Counter = setInterval(f,1000);
}
countDown(); //自运行
//倒计时
function f(){
 var hs = Number(document.getElementById("hs").innerHTML);
 var ms = Number(document.getElementById("ms").innerHTML);
 var ss = Number(document.getElementById("ss").innerHTML);
 if(hs==0&&ms==0&&ss==0||ss>60||ms>60||hs>24){
 var hs = document.getElementById("hs").innerHTML = "00";
 var ms = document.getElementById("ms").innerHTML = "00";
 var ss = document.getElementById("ss").innerHTML = "00";
 clearInterval(Counter);
 console.log(count);
 return;
}
 if(ss>0){
 ss--;
 document.getElementById("ss").innerHTML = ss;
 count++;
 }
 if(ss==0){
 if(ms>0){
  ms--;
  document.getElementById("ms").innerHTML = ms;
  document.getElementById("ss").innerHTML = 59;
 }

 }
 if(ms==0){
 if(hs>0){
  hs--;
  document.getElementById("hs").innerHTML = hs;
  document.getElementById("ms").innerHTML = 59;
 }

 }
}

</script>

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JavaScript实现秒杀时钟倒计时

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