<!DOCTYPE HTML>
<html lang="zh-cn">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<meta name="viewport" content="width=device-width,initial-scale=1,user-scalable=no"/>
<title>无标题文档</title>
<style>
*{
padding:0;
margin:0;
}
body{
background:#000;
}
div{
width:6.4rem;
height:5rem;
margin:0 auto;
line-height:5rem;
font-size:.3rem;
text-align:center;
color:#fff;
background:red;
}
</style>
</head>
<body>
<div>我是测试的</div>
<script>
;!function(top){
var doc=top.document;
top.SetSize=function(width){
this.obj=doc.querySelector('html');
this.width=width;
this.fontSize=100;
this.init().resize();
};
SetSize.prototype={
init:function(){
this.scale=this.obj.clientWidth/this.width;
this.obj.setAttribute("style","font-size:"+(this.scale*this.fontSize)+"px !important");
return this;
},
resize:function(){
top.addEventListener('resize',this.init.bind(this),false);
}
};
SetSize.prototype.constructor=SetSize;
doc.addEventListener('DOMContentLoaded',function(){
new SetSize(640);
},false);
}(parent);
</script>
</body>
</html>
