移动端rem的使用 - 码农教程

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<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
    <!-- <link rel="stylesheet" href="../css/reset-min.css"/> -->
    <script>
        window.onload = function(){
            getRem(750,100)
        };
        window.onresize = function(){
            getRem(750,100)
        };
        function getRem(pwidth,prem){
            var html = document.getElementsByTagName("html")[0];
            var oWidth = document.body.clientWidth || document.documentElement.clientWidth;
            html.style.fontSize = oWidth/pwidth*prem + "px";
        }
        /*
        //小米官网的写法
        !function(n){
            var  e=n.document,
                 t=e.documentElement,
                 i=720,
                 d=i/100,
                 o="orientationchange"in n?"orientationchange":"resize",
                 a=function(){
                     var n=t.clientWidth||320;n>720&&(n=720);
                     t.style.fontSize=n/d+"px"
                 };
                 e.addEventListener&&(n.addEventListener(o,a,!1),e.addEventListener("DOMContentLoaded",a,!1))
        }(window);*/
    </script>
    <style>
        * {
            padding: 0;
            margin: 0;
        }
        .wrap{position:absolute;top:0;left:0;bottom:0;right:0;background:#fefefe;}
        .title{width:100%;height:0.98rem;line-height:0.98rem;color:#fff;background:#e02222;text-align: center;font-size:0.32rem;}
    </style>
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    <div class="wrap">
        <div class="title">首页</div>
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</body>

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原文地址：https://www.cnblogs.com/bao2333/p/11546804.html