JS+CSS to realize dynamic clock

This article example shares the specific code of JS+CSS to implement dynamic clock for your reference. The specific content is as follows

Summary of knowledge points:

The document.querySelector() method returns an element in the document that matches the specified CSS selector.

The setInterval() method calls a function or evaluates an expression at a specified period (in milliseconds).
The setInterval() method will call the function repeatedly until clearInterval() is called or the window is closed. The ID value returned by setInterval() can be used as a parameter to the clearInterval() method.

HTML+js part

<!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" >
 <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 Part

*{
 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;
}

The above is the full content of this article. I hope it will be helpful for everyone’s study. I also hope that everyone will support 123WORDPRESS.COM.

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