Dropping down with Twitter Bootstrap's navbar menu

I’m currently facing some challenges with getting the Twitter Bootstrap drop-down navbar feature to function properly. Despite going through various tutorials, I am unable to make it work by directly copying the code. The console displays the following error:

TypeError: $ is undefined
var old = $.fn.dropdown

Below is my code snippet:

<div class="container-fluid">
    <div class="row-fluid">
        <div class="span8">
            <!--Body content-->
            <div class="navbar">
                <div class="navbar-inner">
                    <ul id="tab" class="nav">
                        <li class="active"><a href="#Tab1" data-toggle="tab">Recent</a></li>
                        <li><a href="#Tab2" data-toggle="tab">Top</a></li>
                        <li><a href="#Tab3" data-toggle="tab">Near you</a></li>
                        <li class="dropdown">
                            <a href="#" class="dropdown-toggle" data-toggle="dropdown">Filters <b class="caret"></b></a>
                            <ul class="dropdown-menu">
                                <li><a href="#">Filter1</a></li>
                                <li><a href="#">Filter2</a></li>
                            </ul>
                        </li>
                    </ul>
                </div>
            </div>
        </div>
        <div class="span4">
            <!--Sidebar content-->
        </div>
    </div>
</div>

Here are the included files, which load successfully:


    <link href="bootstrap/css/bootstrap.css" rel="stylesheet" media="screen">
    <script type="text/javascript" src="bootstrap/js/bootstrap-dropdown.js"></script> 
    <script type="text/javascript" src="jquery-1.7.2.min.js"></script> 

Although the page loads, clicking on the Filters menu item triggers the mentioned exception and doesn’t perform any action.

Answer №1

To ensure functionality, remember to organize the order in which you include your javascript files. JQuery should be loaded before bootstrap for everything to work smoothly.

<link href="bootstrap/css/bootstrap.css" rel="stylesheet" media="screen">
<script type="text/javascript" src="jquery-1.7.2.min.js"></script> 
<script type="text/javascript" src="bootstrap/js/bootstrap-dropdown.js"></script> 

Just a friendly reminder: JavaScript is executed immediately upon loading. Make sure jQuery is already loaded when bootstrap-dropdown.js runs, so that it can utilize jQuery's features seamlessly.

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