App下载
实例代码( Tip: 登录后体验更佳 )
<!DOCTYPE html>
<html>
<head>
<title>W3.CSS(w3cschool.cn)</title>
<meta name="viewport" content="width=device-width, initial-scale=1" charset="UTF-8">
<link rel="stylesheet" href="https://7npmedia.w3cschool.cn/w3.css">
</head>
<body>
<div class="w3-sidebar w3-bar-block w3-light-grey w3-card" style="width:160px;">
<a href="#" class="w3-bar-item w3-button"> 1</a>
<a href="#" class="w3-bar-item w3-button" onclick="myAccFunc()"></a>
<div id="demoAcc" class="w3-hide">
<a href="#" class="w3-bar-item w3-button"></a>
<a href="#" class="w3-bar-item w3-button"></a>
</div>
<div class="w3-dropdown-click">
<a href="#" class="w3-bar-item w3-button" onclick="myDropFunc()"></a>
<div id="demoDrop" class="w3-dropdown-content">
<a href="#" class="w3-bar-item w3-button"></a>
<a href="#" class="w3-bar-item w3-button"></a>
</div>
</div>
<a href="#" class="w3-bar-item w3-button"> 2</a>
<a href="#" class="w3-bar-item w3-button"> 3</a>
</div>
<div class="w3-container" style="margin-left:160px">
<h2></h2>
<p></p>
<p></p>
</div>
<script>
function myAccFunc() {
var x = document.getElementById("demoAcc");
 
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运行结果