SVG實現環形進度條

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        svg{
            height: 100vw;
            width: 100vh;
        }
        circle{
            transform:rotate(-90deg);
            transform-origin:500px 500px;
        }
    </style>
</head>
<body>
    <svg xmlns="http://www.w3.org/2000/svg" version="1.1">
        <circle
            cx="500" 
            cy="500" 
            r="110" 
            fill="#efefef"
        />
        <circle
            id="progress" 
            cx="500" 
            cy="500" 
            r="100" 
            stroke="#3fd0af"
            fill="#efefef"
            stroke-width='20'
            stroke-linecap="round"
            stroke-dasharray="1,800"
        />
        <circle
            cx="500" 
            cy="500" 
            r="90"
            fill="#fff" 
        />
        <text x="490" y="505" fill="red" id="precent">0%</text>
    </svg>
    <script>
        let circle=document.getElementById('progress')
        let text=document.getElementById('precent')
        let r=circle.getAttribute('r')
        let c=2*Math.PI*r
        let len=0;
        setInterval(function(){
            len=len+1
            if(len>c){
                len=0
            }
            let percent=len/c*100;
            text.innerHTML=percent.toFixed(0)+'%'
            circle.setAttribute('stroke-dasharray',`${len},${c}`)
        },20)
    </script>
</body>
</html>
複製代碼
相關文章
相關標籤/搜索