console 命令行工具 X clear
console
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <title>二级菜单</title>
</head>
<body>
  
  <div id="myMenu" class="sd-menu">
    <div>
      <span class="menuSpan">在线工具</span>
      <a href="#">图像优化</a>
      <a href="#">收藏夹图标生成器</a>
      <a href="#">邮件</a>
    </div>
    <div></div>
    <div></div>
    <div></div>
  </div>
  
</body>
</html>