html运行实例（bs_form_input_group_dropdown）-搜寻教程库

代码示例：（标识：bs_form_input_group_dropdown）

<!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/5.1.2/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/5.1.2/js/bootstrap.bundle.js"></script>
</head>
<body>

<div class="p-4">
  <h3>带下拉按钮的输入组</h3>
  <p>在输入组中添加下拉按钮。请注意，您不需要像往常一样的 .dropdown 包装器。</p>
    
  <div class="input-group mt-3 mb-3">
    <button type="button" class="btn btn-primary dropdown-toggle" data-bs-toggle="dropdown">
      下拉按钮
    </button>
    <ul class="dropdown-menu">
      <li><a class="dropdown-item" href="#">链接 1</a></li>
      <li><a class="dropdown-item" href="#">链接 2</a></li>
      <li><a class="dropdown-item" href="#">链接 3</a></li>
    </ul>
    <input type="text" class="form-control" placeholder="用户名">
  </div>
</div>

</body>
</html>