当鼠标移动到指定元素上时，会出现下拉菜单。 - 在线编辑器

          <!DOCTYPE html>
<html>
<head>
  <title>下拉菜单实例|蜜蜂教程(mifengjc.com)</title>
  <meta charset="utf-8">
  <style>
    .dropdown {
      position: relative;
      display: inline-block;
    }

    .dropdown-content {
      display: none;
      position: absolute;
      background-color: #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>
</head>
<body>

  <h2>鼠标移动后出现下拉菜单</h2>
  <p>将鼠标移动到指定元素上就能看到下拉菜单。</p>

  <div class="dropdown">
    <span>鼠标移动到我这！</span>
    <div class="dropdown-content">
      <p>蜜蜂教程</p>
      <p>www.mifengjc.com</p>
    </div>
  </div>

</body>
</html>
        