NeteaseCloudMusic/index.html at master · PH-C/NeteaseCloudMusic · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>网易云音乐</title>
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <link rel="stylesheet" href="//at.alicdn.com/t/font_386252_nz2ixfsdm0io1or.css">
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        body, html {
            height: 100%;
            width: 100%;
            background-color: #fff;
        }
        #app{
            font-size: 0.14rem;
        }
    </style>
</head>
<body>

<div id="app"></div>
<script>
    var desW=375//设计稿宽度375对应的根节点fontsize是100px即1rem=100px;
    function refreshRem() {
        var doc=document.documentElement;
        var winW=doc.clientWidth;
        var radio=winW/desW;//设计稿和窗口大小的比例

        doc.style.fontSize=100*radio+'px';
    }
    refreshRem();
    window.addEventListener('resize',refreshRem)//监听窗口大小的变化重新计算rem的大小

</script>
</body>
</html>