下拉菜单在标题中无效 [英] Dropdown menu not working in header

问题描述

我有一个非常简单的引导头。唯一的问题是标题中的下拉菜单不下拉...我将在下面发布我的代码

I have a very simple bootstrap header. The only issue with it is that the dropdown menu in the header does not drop down... I will post my code below

代码：

<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" />

<!-- Font awesome reference -->
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css" />

<!-- Latest compiled and minified JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>

<nav class="navbar navbar-default navbar-fixed-top">
    <div class="container">
        <div class="navbar-header">
            <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
                <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="#">My Project</a>
        </div>
        <div id="navbar" class="navbar-collapse collapse">
            <ul class="nav navbar-nav">
                <li class="active"><a href="#">Home</a></li>
                <li><a href="#">Contact</a></li>
                <li runat="server" class="dropdown">
                    <a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown<b class="caret"></b></a>
                    <ul class="dropdown-menu">
                        <li><a href="#">Menu Item 1</a></li>
                        <li><a href="#">Menu Item 2</a></li>
                        <li><a href="#">Menu Item 3</a></li>
                        <li><a href="#">Menu Item 4</a></li>
                    </ul>
                </li>
            </ul>              
        </div>
        <!--/.nav-collapse -->
    </div>
</nav>

推荐答案

您需要将JQuery下拉菜单链接到工作。在 bootstrap.min.js 之前添加它。

You need to link the JQuery for dropdown menu to work. Add it before bootstrap.min.js.

添加JQuery之后，就像这样。

After adding JQuery it goes like this.

<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" />

<!-- Font awesome reference -->
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css" />

<!-----add this JQuery before bootstrap.min.js----->
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.0.0-alpha1/jquery.min.js"></script>

<!-- Latest compiled and minified JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>

希望有帮助。

这篇关于下拉菜单在标题中无效的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！