移动端rem适配和meta标签

//得到手机屏幕的宽度
let htmlWidth = document.documentElement.clientWidth || document.body.clientWidth;
//得到html的Dom元素
let htmlDom = document.getElementsByTagName('html')[0];
//设置根元素字体大小
htmlDom.style.fontSize= htmlWidth/20 + 'px';
 <meta name="viewport" content="width=device-width,initial-scale=1,minimun-scale=1,maximum-scale=1,user-scalable=no">

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转载自blog.csdn.net/qq_41148473/article/details/88362959