源代码 :
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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>开源教程(ossoft.cn)</title> <style> body { margin: 0; } ul { list-style-type: none; margin: 0; padding: 0; width: 25%; background-color: #f1f1f1; position: fixed; height: 100%; overflow: auto; } li a { display: block; color: #000; padding: 8px 16px; text-decoration: none; } li a.active { background-color: #4CAF50; color: white; } li a:hover:not(.active) { background-color: #555; color: white; } </style> </head> <body> <ul> <li><a class="active" href="#home">主页</a></li> <li><a href="#news">新闻</a></li> <li><a href="#contact">联系</a></li> <li><a href="#about">关于</a></li> </ul> <div style="margin-left:25%;padding:1px 16px;height:1000px;"> <h2>Fixed Full-height Side Nav</h2> <h3>Try to scroll this area, and see how the sidenav sticks to the page</h3> <p>Notice that this div element has a left margin of 25%. This is because the side navigation is set to 25% width. If you remove the margin, the sidenav will overlay/sit on top of this div.</p> <p>Also notice that we have set overflow:auto to sidenav. This will add a scrollbar when the sidenav is too long (for example if it has over 50 links inside of it).</p> <p>Some text..</p> <p>Some text..</p> <p>Some text..</p> <p>Some text..</p> <p>Some text..</p> <p>Some text..</p> <p>Some text..</p> </div> </body> </html>
运行结果