一个btn-group里面不能同时两个按钮属性都包含data-toggle="dropdown", 否则任何一个按钮都可以点开菜单dropdown-menu
正确的按钮组下拉菜单代码如下：
<!DOCTYPE html><html><head> <title>Bootstrap 按钮组下拉菜单</title> <link rel="stylesheet" href="bootstrap-3.3.7-dist\css\bootstrap.css"> <script src="jquery-3.4.1.min.js"></script> <script src="bootstrap-3.3.7-dist\js\bootstrap.min.js"></script></head><body>
<div class="btn-group"> <Button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown"> Home <span class="caret"></span> </Button> <ul class="dropdown-menu" > <li role="presentation"><a href="#">action1 </a></li> <li role="presentation"><a href="#">action2 </a></li> <li role="presentation"><a href="#">action3 </a></li> </ul></div>
</body></html>
转载于:https://www.cnblogs.com/harryTree/p/11606017.html
