源代码 ：
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Bootstrap 实例 - 输入框组的下拉菜单按钮</title> <link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css"> <script src="https://cdn.staticfile.org/jquery/2.1.1/jquery.min.js"></script> <script src="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script> </head> <body> <div style="padding: 100px 100px 10px;"> <form class="bs-example bs-example-form" role="form"> <div class="row"> <div class="col-lg-6"> <div class="input-group"> <div class="input-group-btn"> <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown"> 下拉菜单 <span class="caret"></span> </button> <ul class="dropdown-menu"> <li><a href="#">功能</a></li> <li><a href="#">另一个功能</a></li> <li><a href="#">其他</a></li> <li class="divider"></li> <li><a href="#">分离的链接</a></li> </ul> </div><!-- /btn-group --> <input type="text" class="form-control"> </div><!-- /input-group --> </div><!-- /.col-lg-6 --><br> <div class="col-lg-6"> <div class="input-group"> <input type="text" class="form-control"> <div class="input-group-btn"> <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown"> 下拉菜单 <span class="caret"></span> </button> <ul class="dropdown-menu pull-right"> <li><a href="#">功能</a></li> <li><a href="#">另一个功能</a></li> <li><a href="#">其他</a></li> <li class="divider"></li> <li><a href="#">分离的链接</a></li> </ul> </div><!-- /btn-group --> </div><!-- /input-group --> </div><!-- /.col-lg-6 --> </div><!-- /.row --> </form> </div> </body> </html>
运行结果