我有这个 html 代码:
<html><head>
<script type="text/javascript" src="https://code.jquery.com/jquery-3.2.1.js"></script>
<link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script type="text/javascript" src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<ul id="menu" class="nav navbar-nav collapse navbar-collapse">
<li class="dropdown">
<a class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">
MAIN
</a>
<ul class="dropdown-menu">
<li class="dropdown">
<a class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="true">
Dropdown Menu 1
</a>
<ul class="dropdown-menu">
<li>
<a>Sub submenu</a>
</li>
</ul>
</li>
<li>
<a>B</a>
</li>
</ul>
</li>
</ul>
</body></html>
问题是，当我下拉“主”菜单时，我看到有一个“下拉菜单 1”......但是如果我关闭主下拉菜单......我会在开发人员工具上看到它公开课添加到第二个下拉列表中，但第一个丢失了公开课......可能是什么问题？感谢您的帮助!
最佳答案
看看: https://jsfiddle.net/26fy9yxm/
JavaScript:
$(document).ready(function(){
$('.dropdown-submenu a.test').on("click", function(e){
$(this).next('ul').toggle();
e.stopPropagation();
e.preventDefault();
});
});
CSS:
.dropdown-submenu {
position: relative;
}
.dropdown-submenu .dropdown-menu {
top: 0;
left: 100%;
margin-top: -1px;
}
HTML:
<!-- Single button -->
<div class="btn-group">
<button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Main <span class="caret"></span>
</button>
<ul class="dropdown-menu">
<li class="dropdown-submenu">
<a class="test" tabindex="-1" href="#">Dropdown Menu 1 <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a tabindex="-1" href="#">Submenu1</a></li>
<li><a tabindex="-1" href="#">Submenu2</a></li>
</ul>
</li>
<li><a href="#">B</a></li>
</ul>
</div>
外部代码:
https://code.jquery.com/jquery-3.2.1.js
https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css
https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js
关于jquery - 带有 Bootstrap 的多个下拉菜单不起作用？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/45733488/