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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<title>rem设计</title>
<script type="text/javascript">
document.querySelector('html').style.fontSize=window.screen.width / 20 +'px';
// 针对PC端的切换屏幕大小设置的
window.onresize=function(){
document.querySelector('html').style.fontSize=window.screen.width / 20 +'px';
}
</script>
<style>
.content{
background-color: hotpink;
width: 5rem;
height: 5rem
}
</style>
</head>
<body>
<div class="content">
</div>
</body>
</html>
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