<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<meta name="viewport" content="width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0">
<style>
*{margin:0;padding:0;}
html, body {
height: 100%;
}
body {
overflow-x: hidden;
width: 320px;
background: #ccc;
}
#nav {
position: absolute;
left: -100px;
top: 0;
width: 100px;
height: 100%;
background: #f90;
}
#content {
margin: 0 auto;
width: 320px;
height: 100%;
background: #666;
}
.showNav {
transform: translateX(100px);
-webkit-transform: translateX(100px);
transition: transform 1s;
-webkit-transition: -webkit-transform 1s;
}
</style>
</head>
<body>
<div id="nav"></div>
<div id="content">
<input type="button" value="点我试试" id="btn">
</div>
<script>
var oBtn = document.getElementById("btn");
oBtn.onclick = function() {
document.body.className = "showNav";
}
</script>
</body>
</html>
