css侧滑代码

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>CSS侧滑菜单</title>
<style>
  body {
    margin: 0;
    font-family: Arial, sans-serif;
  }
  .sidebar {
    height: 100vh;
    width: 0;
    position: fixed;
    z-index: 1;
    top: 0;
    left: 0;
    background-color: #111;
    overflow-x: hidden;
    transition: 0.5s;
    padding-top: 60px;
  }
  .sidebar a {
    padding: 8px 8px 8px 32px;
    text-decoration: none;
    font-size: 25px;
    color: #818181;
    display: block;
    transition: 0.3s;
  }
  .sidebar a:hover {
    color: #f1f1f1;
  }
  .sidebar .closebtn {
    position: absolute;
    top: 0;
    right: 25px;
    font-size: 36px;
    margin-left: 50px;
  }
  .openbtn {
    font-size: 20px;
    cursor: pointer;
    background-color: #111;
    color: white;
    padding: 10px 15px;
    border: none;
  }
  .openbtn:hover {
    background-color: #444;
  }
  #main {
    transition: margin-left .5s;
    padding: 16px;
  }
</style>
</head>
<body>

<div id="mySidebar" class="sidebar">
  <a href="javascript:void(0)" class="closebtn" onclick="closeNav()">×</a>
  <a href="#">About</a>
  <a href="#">Services</a>
  <a href="#">Clients</a>
  <a href="#">Contact</a>
</div>

<div id="main">
  <button class="openbtn" onclick="openNav()">☰ 打开侧滑菜单</button>
  <h2>主内容区域</h2>
  <p>这里是主内容区域。</p>
</div>

<script>
  function openNav() {
    document.getElementById("mySidebar").style.width = "250px";
    document.getElementById("main").style.marginLeft = "250px";
  }

  function closeNav() {
    document.getElementById("mySidebar").style.width = "0";
    document.getElementById("main").style.marginLeft = "0";
  }
</script>

</body>
</html>