css html js 时钟-CFANZ编程社区

css html js 时钟
在这里插入图片描述
<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        #box {
            width: 110px;
            /* border: solid 1px red; */
            margin: 0 auto;
            padding: 10px 5px;
            overflow: hidden;


        }
        #box>span{


            width: 20px;
            text-align: center;
            font-size: 21px;
            float: left;
        }
    </style>
</head>

<body>
    <div id="box">
        <span id="hour">00</span>
        <span>:</span>
        <span id="miu">00</span>
        <span>:</span>
        <span id="sec">00</span>

    </div>
    <button id="stop">停止时间</button>
</body>

</html>
<script>

    function two(_obj){
        return ('00'+_obj).substring(('00'+_obj).length-2,('00'+_obj).length)
    }

    var taskId2 = setInterval(function () {
        var dt = new Date();
        var h = dt.getHours()
        var m = dt.getMinutes()
        var s = dt.getSeconds()
        document.getElementById('hour').innerText = two(h);
        document.getElementById('miu').innerText =two(m);
        document.getElementById('sec').innerText = two(s);
    }, 1000);
    var stop = document.getElementById('stop');
    stop.onclick = function () {
        //停止定时器的进程 
        clearInterval(taskId2)

    }
</script>
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