首页 > 代码库 > js实现100秒倒计时和简易时钟

js实现100秒倒计时和简易时钟

2024-09-13 07:31:38   216人阅读

<!DOCTYPE html>

<html>

<head>

<meta charset="utf-8">

<title>100s倒计时</title>

<style>

body,div{margin:0;padding:0;}

body{color:#fff;font:16px/1.5 \5fae\8f6f\96c5\9ed1;}

#countdown{width:300px;text-align:center;background:#000;margin:10px auto;padding:20px 0;}

input{border:0;width:283px;height:50px;cursor:pointer;margin-top:20px;background:url(技术分享
) no-repeat;}

input.cancel{background-position:0 -50px;}

span{color:#000;width:80px;line-height:2;background:#fbfbfb;border:2px solid #b4b4b4;margin:0 10px;padding:0 10px;}

    </style>

    <script>

    window.onload = function(){

    var oCount = document.getElementById(‘countdown‘),

       oInput = oCount.getElementsByTagName(‘input‘)[0],

       aSpan = oCount.getElementsByTagName(‘span‘),

       timer = null;

    oInput.addEventListener(‘click‘,function(){

    this.className == ‘‘?(timer = setInterval(updateTime,1000)):clearInterval(timer);

    this.className = this.className === ‘cancel‘?‘‘:‘cancel‘;

    },false);

    function format(a){

    return a.toString().replace(/^(\d)$/,‘0$1‘);

    }

    function updateTime(){

    //console.log(aSpan[0].innerHTML);

    var remain = parseInt(aSpan[0].innerHTML.replace(/^0/,‘‘))*60+parseInt(aSpan[1].innerHTML.replace(/^0/,‘‘));

    if (remain <= 0) {

    clearInterval(timer);

    return;

    }

    remain--;

    aSpan[0].innerHTML = format(parseInt(remain/60));

    aSpan[1].innerHTML = format(remain%60);

 

    }

    }

    </script>

</head>

<body>

<div id="countdown">

<span>01</span>分钟<span>40</span>秒

<input type="button" value="" />

</div>

</body>

</html>

 欢迎加入618237474，找群主私聊，送海量学习资料免费送

js实现100秒倒计时和简易时钟


联系
我们