<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<title>Document</title>
<link rel="stylesheet" href="index.css">
<style>
*{
margin: 0;
padding: 0;
}
body{
100%;
overflow: hidden;
}
#leftMenu {
position: absolute;
height: 100%;
200px;
background: rgba(0, 0, 0, 0.5);
transition: all 0.5s;
transform: translateX(-200px);
}
#leftMenu > ul {
list-style: none;
}
#leftMenu > ul > li {
margin-top: 5px;
height: 50px;
line-height: 50px;
background-color: pink;
color: #fff;
}
#main {
100%;
height: 100%;
background: blue;
position: absolute;
transition: all 0.5s;
}
</style>
</head>
<body>
<section id="leftMenu">
<ul>
<li>首页</li>
<li>首页#</li>
<li>首页</li>
</ul>
</section>
<main id="main">
<input type="button" value="menu" id="btn">
</main>
</body>
<script>
var leftMenu = document.querySelector('#leftMenu');
var btn = document.querySelector('#btn');
var main = document.querySelector('#main');
var falg = true;
btn.addEventListener('click',function(){
if(falg){
leftMenu.style.transform = "translateX(0px)";
main.style.transform = "translateX(200px)";
falg=false;
}else{
leftMenu.style.transform = "translateX(-200px)";
main.style.transform = "translateX(0px)";
falg=true;
}
})
</script>
</html>