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clip-path-circle-progress.html
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<!DOCTYPE html>
<html>
<head>
<title></title>
<style type="text/css">
html,body {
padding: 0;
margin: 0;
height: 100%;
}
body {
background-color: slategrey;
display: flex;
justify-content: center;
align-items: center;
}
.circle-box {
border-radius: 50%;
width: 160px;
height: 160px;
overflow: hidden;
position: relative;
}
.circle-box::after {
content: '';
display: block;
width: 140px;
height: 140px;
border: 20px solid rgba(255, 255, 255, .2);
border-radius: 50%;
position: absolute;
top: -10px; left: -10px;
z-index: 1;
}
.circle-box::before {
content: '';
display: block;
width: 140px;
height: 140px;
border-radius: 50%;
position: absolute;
top: 0; left: 0; bottom: 0; right: 0;
margin: auto;
z-index: 3;
background-color: yellow;
background-size: cover;
background-image: url('https://tvax3.sinaimg.cn/crop.0.0.1242.1242.180/4ca9b00fly8frote8nd02j20yi0yimyu.jpg?KID=imgbed,tva&Expires=1610009213&ssig=2ZR8j6cM1%2F');
}
.circle {
width: 140px;
height: 140px;
border: 20px solid rgb(165, 196, 226);
border-radius: 50%;
position: absolute;
top: -10px; left: -10px;
z-index: 2;
}
</style>
</head>
<body>
<div>
<div class="circle-box">
<div class="circle"></div>
</div>
<p style="text-align: center; color: white;">0%</p>
</div>
<script>
let div = document.getElementsByClassName('circle')[0];
let p = document.getElementsByTagName('p')[0];
function calc(rate){
rate = (rate + 180) * -1
let x = (Math.sin(rate * Math.PI/180) + 1) / 2
let y = (Math.cos(rate * Math.PI/180) + 1) / 2
return Math.round(x * 100) + "% " + Math.round(y * 100) + "%"
}
function endHandler() {
console.info("结束")
div = null
d = null
totalTime = null
dotData = null
p = null
}
// 角度，从0 开始
let d = 0;
// 累加的最大值
let totalTime = 10000;
// 保存的环上的点数组数据
let dotData = []
let si = setInterval(() => {
// 计算并保存当前角度的
p.innerText = (d/totalTime * 100).toFixed(0) + '%'
dotData.push(calc(d / totalTime * 360))
// 将计算的点数据赋值给页面环元素(vue写法)
// cycleCss =
// console.log(dotData)
div.style.clipPath = "polygon(50% 50%," + dotData.join(",") + ")"
if(d >= totalTime){
clearInterval(si)
endHandler()
} else {
d = d + 50;
}
}, 50)
</script>
</body>
</html>