<!DOCTYPE html> <html> <head> <title>下拉菜单实例|菜鸟教程(runoob.com)</title> <meta charset="utf-8"> <style> .dropbtn { background-color: #4CAF50; color: white; padding: 16px; font-size: 16px; border: none; cursor: pointer; } .dropdown { position: relative; display: inline-block; } .dropdown-content { display: none; /* 这个必须是none,也就是鼠标不放在div上,不会显示这部分内容*/ position: absolute; background-color: #f9f9f9; min-width: 160px; box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2); } .dropdown-content a { color: black; padding: 12px 16px; text-decoration: none; display: block; } .dropdown-content a:hover {background-color: #f1f1f1} .dropdown:hover .dropdown-content { display: block; /* 覆盖display: none;变成display: block;*/ } .dropdown:hover .dropbtn { background-color: #3e8e41; } </style> </head> <body> <h3>下拉菜单</h3> <p>鼠标移动到按钮上打开下拉菜单。</p> <div class="dropdown"> <button class="dropbtn">下拉菜单</button> <div class="dropdown-content"> <a href="http://lvnian.blog.51cto.com/">教程 1</a> <a href="http://lvnian.blog.51cto.com/">教程 2</a> <a href="http://lvnian.blog.51cto.com/">教程 3</a> <a href="http://lvnian.blog.51cto.com/">教程 4</a> </div> </div> </body> </html>
