w3css 在线编辑器 | w3css代码测试

<!DOCTYPE html>
<html>
<title>W3.CSS</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://www.cainiaomax.com/w3css/4/w3.css">
<link rel="stylesheet" href="https://cdn.cainiaomax.com/cdnjs/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<body>

<h2>带下拉菜单的导航栏</h2>
  <p><strong>提示</strong>：如果您想在下拉文本旁边添加一个下拉符号，请添加一个合适的图标：</p>
  
<div class="w3-bar-block w3-black">
  <a class="w3-bar-item w3-button" href="#">首页</a>
  <a class="w3-bar-item w3-button" href="#">链接 1</a>
  <a class="w3-bar-item w3-button" href="#">链接 2</a>
  <div class="w3-dropdown-hover">
    <button class="w3-button">下拉菜单<i class="fa fa-caret-down"></i>
    </button>
    <div class="w3-dropdown-content w3-bar-block w3-card-4">
      <a href="#" class="w3-bar-item w3-button">链接 1</a>
      <a href="#" class="w3-bar-item w3-button">链接 2</a>
      <a href="#" class="w3-bar-item w3-button">链接 3</a>
    </div>
  </div>   
</div>

</div>

</body>
</html>

报个问题: