bootstrap实现折叠菜单
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="css/bootstrap.min.css" />
<script type="text/javascript" src="js/jquery-3.3.1.min.js" ></script>
<script type="text/javascript" src="js/bootstrap.min.js" ></script>
</head>
<body>
<div class="container">
<div class="row">
<div class="col-lg-4">
<div class="panel-group">
<div class="panel panel-success">
<div class="panel-heading">
<div class="panel-title text-center">
<a href="#sys-set" data-toggle="collapse">系统设置</a>
</div>
</div>
<div class="panel-collapse collapse in" id="sys-set">
<div class="panel-body">
<ul class="list-unstyled text-center">
<li><a href="#">管理员登录</a></li>
<li><a href="#">管理员账号</a></li>
<li><a href="#">管理员密码</a></li>
</ul>
</div>
</div>
<div class="panel-heading">
<div class="panel-title text-center">
<a href="#pep-set" data-toggle="collapse">人员设置</a>
</div>
</div>
<div class="panel-collapse collapse in " id="pep-set">
<div class="panel-body">
<ul class="list-unstyled text-center">
<li><a href="#">管理员登录</a></li>
<li><a href="#">管理员账号</a></li>
<li><a href="#">管理员密码</a></li>
</ul>
</div>
</div>
<div class="panel-heading">
<div class="panel-title text-center">
<a href="#meu-set" data-toggle="collapse">菜单设置</a>
</div>
</div>
<div class="panel-collapse collapse in " id="meu-set">
<div class="panel-body">
<ul class="list-unstyled text-center">
<li><a href="#">管理员登录</a></li>
<li><a href="#">管理员账号</a></li>
<li><a href="#">管理员密码</a></li>
</ul>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="css/bootstrap.min.css" />
<script type="text/javascript" src="js/jquery-3.3.1.min.js" ></script>
<script type="text/javascript" src="js/bootstrap.min.js" ></script>
</head>
<body>
<div class="container">
<div class="row">
<div class="col-lg-4">
<div class="panel-group">
<div class="panel panel-success">
<div class="panel-heading">
<div class="panel-title text-center">
<a href="#sys-set" data-toggle="collapse">系统设置</a>
</div>
</div>
<div class="panel-collapse collapse in" id="sys-set">
<div class="panel-body">
<ul class="list-unstyled text-center">
<li><a href="#">管理员登录</a></li>
<li><a href="#">管理员账号</a></li>
<li><a href="#">管理员密码</a></li>
</ul>
</div>
</div>
<div class="panel-heading">
<div class="panel-title text-center">
<a href="#pep-set" data-toggle="collapse">人员设置</a>
</div>
</div>
<div class="panel-collapse collapse in " id="pep-set">
<div class="panel-body">
<ul class="list-unstyled text-center">
<li><a href="#">管理员登录</a></li>
<li><a href="#">管理员账号</a></li>
<li><a href="#">管理员密码</a></li>
</ul>
</div>
</div>
<div class="panel-heading">
<div class="panel-title text-center">
<a href="#meu-set" data-toggle="collapse">菜单设置</a>
</div>
</div>
<div class="panel-collapse collapse in " id="meu-set">
<div class="panel-body">
<ul class="list-unstyled text-center">
<li><a href="#">管理员登录</a></li>
<li><a href="#">管理员账号</a></li>
<li><a href="#">管理员密码</a></li>
</ul>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>
