基本下拉菜单
当鼠标移动到指定元素上时，会出现下拉菜单。
实例
<style> .dropdown { position: relative; display: inline-block; } .dropdown-content { display: none; position: absolute; margin: 0px; padding: 0px; color: gray;"> #f9f9f9; min-width: 160px; box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2); padding: 12px 16px; } .dropdown:hover .dropdown-content { display: block; } </style>
<div class="dropdown"> <span>鼠标移动到我这！</span> <div class="dropdown-content"> <p>菜鸟教程</p> <p>www.runoob.com</p> </div> </div>