try_w3sidebar_20 在线代码实例

实例代码( Tip: 登录后体验更佳 )
运行代码

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<!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">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
</head>
<body>
<!-- Sidebar -->
<div class="w3-sidebar w3-bar-block w3-animate-left" style="display:none;z-index:5" id="mySidebar">
    <button class="w3-bar-item w3-button w3-large" onclick="w3_close()">关闭 &times;</button>
    <a href="#" class="w3-bar-item w3-button">链接 1</a>
    <a href="#" class="w3-bar-item w3-button">链接 2</a>
    <a href="#" class="w3-bar-item w3-button">链接 3</a>
</div>
<!-- Page Content -->
<div class="w3-overlay w3-animate-opacity" onclick="w3_close()" style="cursor:pointer" id="myOverlay"></div>
<div>
    <button class="w3-button w3-white w3-xxlarge" onclick="w3_open()">&#9776;</button>
    <div class="w3-container">
        <h1>侧边栏覆盖</h1>
        <p>打开侧栏时，可以使用w3-overlay类创建叠加效果。w3-overlay类在“页面内容”中添加了不透明度为50％的黑色背景-该效果将“突出显示”侧面导航。</p>
        <p>单击“汉堡菜单”以查看效果。</p>
    </div>
</div>
<script>
    function w3_open() {
        document.getElementById("mySidebar").style.display = "block";
        document.getElementById("myOverlay").style.display = "block";
    }
 
 
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运行结果
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