我是bootstrap和JQuery的新手。我遇到了SB Admin 2 bootstrap的问题。我已经删除了一个示例（仪表板）页面并动态地向侧边栏导航添加了一个菜单项。
问题是新菜单项不会切换/折叠。
下面是侧边菜单html的片段。
<nav class="navbar navbar-default navbar-static-top" role="navigation" style="margin-bottom: 0">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#" id="navbar_brand">SB Admin v2.0</a>
</div>
<!-- /.navbar-header -->
<ul class="nav navbar-top-links navbar-right">
<li class="dropdown">
<a class="dropdown-toggle" data-toggle="dropdown" href="#">
<i class="fa fa-user fa-fw"></i> <i class="fa fa-caret-down"></i>
</a>
<ul class="dropdown-menu dropdown-user">
<li>
<a href="login.html"><i class="fa fa-sign-out fa-fw"></i> Logout</a>
</li>
</ul>
<!-- /.dropdown-user -->
</li>
<!-- /.dropdown -->
</ul>
<!-- /.navbar-top-links -->
<div class="navbar-default sidebar" role="navigation">
<div class="sidebar-nav navbar-collapse">
<ul class="nav" id="side-menu">
<li>
<a href="index.html"><i class="fa fa-dashboard fa-fw"></i> Dashboard</a>
</li>
<li>
<a href="#"><i class="fa fa-files-o fa-fw"></i> Sample Pages<span class="fa arrow"></span></a>
<ul class="nav nav-second-level">
<li>
<a href="blank.html">Blank Page</a>
</li>
<li>
<a href="login.html">Login Page</a>
</li>
</ul>
<!-- /.nav-second-level -->
</li>
</ul>
</div>
<!-- /.sidebar-collapse -->
</div>
<!-- /.navbar-static-side -->
</nav>
要动态添加新菜单项，我添加了一个点击事件处理程序，如下所示。
$("#navbar_brand").click(function(){
$("#side-menu").append('<li><a href="#"><i class="fa fa-files-o fa-fw"></i> TEST Pages<span class="fa arrow"></span></a><ul class="nav nav-second-level"><li><a href="blank.html">Blank Page</a></li><li><a href="login.html">Login Page</a></li></ul></li>');
});
出现新菜单项但不切换为原始样本页面菜单。有人可以帮忙吗？
TIA
*更新*
请查看下面的html文件。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="">
<meta name="author" content="">
<title>SB Admin 2 - Bootstrap Admin Theme</title>
<!-- Bootstrap Core CSS -->
<link href="vendor/bootstrap/css/bootstrap.min.css" rel="stylesheet">
<!-- MetisMenu CSS -->
<link href="vendor/metisMenu/metisMenu.min.css" rel="stylesheet">
<!-- Custom CSS -->
<link href="dist/css/sb-admin-2.css" rel="stylesheet">
<!-- Morris Charts CSS -->
<link href="vendor/morrisjs/morris.css" rel="stylesheet">
<!-- Custom Fonts -->
<link href="vendor/font-awesome/css/font-awesome.min.css" rel="stylesheet" type="text/css">
<!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->
<!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
<!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
<script src="https://oss.maxcdn.com/libs/respond.js/1.4.2/respond.min.js"></script>
<![endif]-->
</head>
<body>
<div id="wrapper">
<!-- Navigation -->
<nav class="navbar navbar-default navbar-static-top" role="navigation" style="margin-bottom: 0">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#" id="navbar_brand">SB Admin v2.0</a>
</div>
<!-- /.navbar-header -->
<ul class="nav navbar-top-links navbar-right">
<li class="dropdown">
<a class="dropdown-toggle" data-toggle="dropdown" href="#">
<i class="fa fa-user fa-fw"></i> <i class="fa fa-caret-down"></i>
</a>
<ul class="dropdown-menu dropdown-user">
<li>
<a href="login.html"><i class="fa fa-sign-out fa-fw"></i> Logout</a>
</li>
</ul>
<!-- /.dropdown-user -->
</li>
<!-- /.dropdown -->
</ul>
<!-- /.navbar-top-links -->
<div class="navbar-default sidebar" role="navigation">
<div class="sidebar-nav navbar-collapse">
<ul class="nav" id="side-menu">
<li>
<a href="index.html"><i class="fa fa-dashboard fa-fw"></i> Dashboard</a>
</li>
<li>
<a href="#"><i class="fa fa-files-o fa-fw"></i> Sample Pages<span class="fa arrow"></span></a>
<ul class="nav nav-second-level">
<li>
<a href="blank.html">Blank Page</a>
</li>
<li>
<a href="login.html">Login Page</a>
</li>
</ul>
<!-- /.nav-second-level -->
</li>
</ul>
</div>
<!-- /.sidebar-collapse -->
</div>
<!-- /.navbar-static-side -->
</nav>
<div id="page-wrapper">
<div class="row">
<div class="col-lg-12">
<h1 class="page-header">Dashboard</h1>
</div>
<!-- /.col-lg-12 -->
</div>
<!-- /.row -->
<div class="row">
<div class="col-lg-6">
<div class="panel panel-default">
<div class="panel-heading">
Hover Rows
</div>
<!-- /.panel-heading -->
<div class="panel-body">
<div class="table-responsive">
<table class="table table-hover">
<thead>
<tr>
<th>#</th>
<th>First Name</th>
<th>Last Name</th>
<th>Username</th>
</tr>
</thead>
<tbody>
<tr>
<td>1</td>
<td>Mark</td>
<td>Otto</td>
<td>@mdo</td>
</tr>
<tr>
<td>2</td>
<td>Jacob</td>
<td>Thornton</td>
<td>@fat</td>
</tr>
<tr>
<td>3</td>
<td>Larry</td>
<td>the Bird</td>
<td>@twitter</td>
</tr>
</tbody>
</table>
</div>
<!-- /.table-responsive -->
</div>
<!-- /.panel-body -->
</div>
<!-- /.panel -->
</div>
<!-- /.col-lg-6 -->
</div>
<!-- /.row -->
</div>
<!-- /#page-wrapper -->
</div>
<!-- /#wrapper -->
<!-- jQuery -->
<script src="vendor/jquery/jquery.min.js"></script>
<!-- Custom Theme JavaScript -->
<script src="vendor/core/js/common.js"></script>
<!-- Metis Menu Plugin JavaScript -->
<script src="vendor/metisMenu/metisMenu.min.js"></script>
<!-- Custom Theme JavaScript -->
<script src="dist/js/sb-admin-2.js"></script>
<!-- Bootstrap Core JavaScript -->
<script src="vendor/bootstrap/js/bootstrap.min.js"></script>
<!-- Page Custom JavaScript code -->
<script>
$( window ).on('load', function() {
console_log("page loadedd");
$(window).ready(function(){
console_log("page ready");
// setup page
$.pageInit();
});
});
$.pageInit = function() {
}
$("#navbar_brand").click(function(){
console_log("test");
$("#side-menu").append('<li><a href="#"><i class="fa fa-files-o fa-fw"></i> TEST Pages<span class="fa arrow"></span></a><ul class="nav nav-second-level"><li><a href="blank.html">Blank Page</a></li><li><a href="login.html">Login Page</a></li></ul></li>');
});
</script>
</body>
</html>
答案 0 :(得分：0)
很难确切地说出#side-menu功能是什么，而无法查看您正在使用的JS脚本，但您需要注意JavaScript的工作顺序。这就是您的浏览器正在做的事情：
#side-menu并将功能应用于其现有的2个<li>子元素。#navbar_brand后，它将第3个<li>子项添加到#side-menu，但是这个孩子从未添加任何功能，因为这是在步骤中发生的2。您有两个选择：
<li>孩子。<li>内置到HTML文档中，但在第3个CSS的CSS中有display: none。点击#navbar_brand后，您可以通过将其样式更改为display: block或任何您想要的内容来显示它。