用JavaScript,万分ganxie

利用JavaScript结合css定位和transform属性实现一个HTML在线时钟。
1、根据当前的系统时间,精确到秒显示时间;
2、模拟正常的钟表走时效果,每一秒秒针走一小格;
3、分针每一分钟走一小格;
4、时针不能直接每一小时走一大格,而是模拟每分钟都转动一点点角度的真实效果。

参考:

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>在线时钟</title>
    <style>
        #face {
            width: 600px;
            height: 600px;
            margin: 20px auto;
            background: url("../image/clockface.jpg") no-repeat;
            position: relative;
        }
        #second {
            width: 4px;
            height: 200px;
            background-color: #FC5753;
            position: absolute;
            left: 298px;
            top: 100px;
            /* 设置指针的旋转基点为下方中间位置 */
            transform-origin: bottom center;
        }
        #minute {
            width: 10px;
            height: 175px;
            background-color: #0e2218;
            position: absolute;
            left: 295px;
            top: 125px;
            transform-origin: bottom center;
        }
        #hour {
            width: 15px;
            height: 150px;
            background-color: #5948ff;
            position: absolute;
            left: 292px;
            top: 150px;
            transform-origin: bottom center;
        }
        #center {
            width: 30px;
            height: 30px;
            background-color: black;
            position: absolute;
            left: 285px;
            top: 285px;
            border-radius: 50%;
        }
    </style>
</head>
<body>
<div id="face">
    <div id="hour"></div>   <!-- 时针 -->
    <div id="minute"></div> <!-- 分针 -->
    <div id="second"></div> <!-- 秒针 -->
    <div id="center"></div> <!-- 中心的小圆点 -->
</div>
</body>
<script>
    setInterval(function() {
        var time = new Date();
        var second = time.getSeconds();
        var minute = time.getMinutes();
        var hour = time.getHours();
        var hourDeg = hour%12*30 + minute*0.5;  

        document.getElementById("second").style.transform = "rotate(" + second*6 + "deg)";
        document.getElementById("minute").style.transform = "rotate(" + minute*6 + "deg)";
        document.getElementById("hour").style.transform = "rotate(" + hourDeg + "deg)";
    }, 1000);
</script>
</html>

img