js实现右侧导航菜单

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>右侧导航菜单</title>
    <style>
        body {
            margin: 0;
            font-family: Arial, sans-serif;
        }
        .sidebar {
            position: fixed;
            right: 0;
            top: 0;
            width: 200px;
            height: 100%;
            background-color: #f4f4f4;
            padding: 20px;
            box-sizing: border-box;
        }
        .sidebar ul {
            list-style-type: none;
            padding: 0;
        }
        .sidebar ul li {
            margin-bottom: 10px;
        }
        .sidebar ul li a {
            text-decoration: none;
            color: #333;
        }
    </style>
</head>
<body>
    <div class="sidebar">
        <ul>
            <li><a href="#section1">Section 1</a></li>
            <li><a href="#section2">Section 2</a></li>
            <li><a href="#section3">Section 3</a></li>
        </ul>
    </div>
    <div style="margin-right: 240px; padding: 20px;">
        <h1>主要内容区域</h1>
        <section id="section1">
            <h2>Section 1</h2>
            <p>这是第一部分的内容。</p>
        </section>
        <section id="section2">
            <h2>Section 2</h2>
            <p>这是第二部分的内容。</p>
        </section>
        <section id="section3">
            <h2>Section 3</h2>
            <p>这是第三部分的内容。</p>
        </section>
    </div>
</body>
</html>