菜鸟学堂
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源代码
<!DOCTYPE html> <html> <head> <title>下拉菜单实例|菜鸟学堂(edu.jb51.net)</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; position: absolute; right: 0; 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; } .dropdown:hover .dropbtn { background-color: #3e8e41; } </style> </head> <body> <h2>下拉内容的对齐方式</h2> <p>left 和 right 属性指定了下拉内容是从左到右或从右到左。</p> <div class="dropdown" style="float:left;"> <button class="dropbtn">左</button> <div class="dropdown-content" style="left:0;"> <a href="#">菜鸟学堂 1</a> <a href="#">菜鸟学堂 2</a> <a href="#">菜鸟学堂 3</a> </div> </div> <div class="dropdown" style="float:right;"> <button class="dropbtn">右</button> <div class="dropdown-content"> <a href="#">菜鸟学堂 1</a> <a href="#">菜鸟学堂 2</a> <a href="#">菜鸟学堂 3</a> </div> </div> </body> </html>
运行结果
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菜鸟学堂 edu.jb51.net