JS+CSS实现动态时钟

本文实例为大家分享了JS+CSS实现动态时钟的具体代码，供大家参考，具体内容如下

JS+CSS实现动态时钟

知识点总结：

document.querySelector（）方法返回文档中匹配指定 CSS 选择器的一个元素。

setInterval() 方法可按照指定的周期（以毫秒计）来调用函数或计算表达式。
setInterval() 方法会不停地调用函数，直到 clearInterval() 被调用或窗口被关闭。由 setInterval() 返回的 ID 值可用作 clearInterval() 方法的参数。

HTML+js部分

<!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">
 <link rel="stylesheet" href="shiying.css" rel="external nofollow"  >
 <title>Document</title>
</head>

<body>
 <div class="clock">
 <div class="hour">
 <div class="hr" id="hr"></div>
 </div>
 <div class="min">
 <div class="mn" id="mn"></div>
 </div>
 <div class="sec">
 <div class="sc" id="sc"></div>
 </div>
 </div>
 <script type="text/javascript">
 const deg = 6;
 const hr = document.querySelector('#hr');
 const mn = document.querySelector('#mn');
 const sc = document.querySelector('#sc');

 setInterval(() => {

 let day = new Date();
 let hh = day.getHours() * 30;
 let mm = day.getMinutes() * deg;
 let ss = day.getSeconds() * deg;

 hr.style.transform = `rotateZ(${(hh) + (mm / 12)}deg)`;
 mn.style.transform = `rotateZ(${mm}deg)`;
 sc.style.transform = `rotateZ(${ss}deg)`;
 })

 </script>
</body>

</html>

CSS部分

*{
 margin:0;
 padding:0;
 box-sizing: border-box;
}
body{
 display: flex;
 justify-content: center;
 align-items: center;
 min-height: 100vh;
 background: #091921;
}
.clock{
 width: 350px;
 height: 350px;
 display:flex;
 justify-content: center;
 align-items: center;
 background: url(1613462007944.png);
 background-size: cover;
 border:4px solid #091921;
 border-radius: 50%;
 box-shadow: 0 -15px 15px rgba(255,255,255,0.05),
 inset 0 -15px 15px rgba(255,255,255, 0.05),
 0 -15px 15px rgba(0,0,0,0.05),
 inset 0 -15px 15px rgba(0,0,0, 0.05);
}
.clock:before
{
 content:"";
 position: absolute;
 width: 15px;
 height: 15px;
 background: #fff;
 border-radius: 50%;
 z-index:10000;

}
.clock .hour,
.clock .min,
.clock .sec
{
 position: absolute;

}
.clock .hour, .hr{
 width: 160px;
 height: 160px;
}
.clock .min, .mn{
 width: 190px;
 height: 190px;
}
.clock .sec, .sc{
 width: 230px;
 height: 230px;
}
.hr, .mn, .sc{
 display: flex;
 justify-content: center;
 position: absolute;
 border-radius: 50%;
}
.hr:before{
 content:"";
 position: absolute;
 width: 8px;
 height: 80px;
 background: #ff105e;
 z-index: 10;
 border-radius: 6px 6px 0 0;
}
.mn:before{
 content:"";
 position: absolute;
 width: 4px;
 height: 90px;
 background: #fff;
 z-index: 11;
 border-radius: 6px 6px 0 0;
}
.sc:before{
 content:"";
 position: absolute;
 width: 4px;
 height: 150px;
 background: #fff;
 z-index:12;
 border-radius: 6px 6px 0 0;
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持NICE源码。

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