- 添加一段js
- 给最外层元素添加css样式：
width:7.5rem;margin:0 auto;
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>移动端rem布局</title>
<style type="text/css">
#main{
width: 7.5rem;
margin: 0 auto;
height: 5rem;
background: red;
}
</style>
</head>
<body>
<div id="main">
666
</div>
<script type="text/javascript">
(function(doc, win) {
var docEl = doc.documentElement,
resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize',
recalc = function () {
var clientWidth = docEl.clientWidth;
if (!clientWidth) return;
if(clientWidth>=750){
clientWidth = 750;
docEl.style.fontSize = '100px';
}else{
docEl.style.fontSize = 100 * (clientWidth / 750) + 'px';
}
};
if (!doc.addEventListener) return;
win.addEventListener(resizeEvt, recalc, false);
doc.addEventListener('DOMContentLoaded', recalc, false);
})(document, window);
</script>
</body>
</html>
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