直接上代码，简单的很
<!doctype html>
<html >
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
.circle-progress{
position: relative;
width: 100px;
height: 100px;
animation: progressMove linear 5s infinite;
}
.circle-progress .item{
position: absolute;
left: 0;
right: 0;
width: 100%;
height: 100%;
}
.circle-progress .bar{
position: absolute;
width: 5%;
height: 15%;
left: 50%;
transform: translateX(-50%);
background-color: #aaa;
}
@keyframes progressMove {
from{
transform: rotate(0deg);
}
to{
transform: rotate(360deg);
}
}
</style>
</head>
<body>
<div class="circle-progress circleProgress">
<div class="item">
</div>
</div>
<script>
var box = document.querySelector('.circleProgress');
for(var i=0;i<18;i++){
var html = document.createElement('div');
html.classList = 'item';
html.classList.add('item'+i);
html.innerHTML = '<div class="bar"></div>';
html.style.transform = 'rotate('+i*15+'deg)';
html.style.opacity = i/20;
box.appendChild(html)
}
</script>
</body>
</html>
![实现计算器功能[图]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)