The absence of jQuery is causing an error in the Twitter Bootstrap code

I am encountering an issue where I am receiving an error message stating that jQuery is not defined. My intention is to utilize both twitter bootstrap and jQuery-UI in my project. In the <head> section, I have included all the necessary CSS and JS files. Upon inspection, I realized that the jQuery-UI page is utilizing version 1.9.1 of jQuery while the latest version available is 1.10.2. This leads me to believe that there might be a conflict arising from this discrepancy. As Twitter Bootstrap relies on jQuery, it is possible that this dependency is causing the error. Alternatively, it could be a mistake on my end.

Included in the Head:

<head>
    <meta charset="utf-8" />
    <link rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css" />
    <link rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap-theme.min.css" />
    <link rel="stylesheet" href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css" />
    <script src="http://netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
    <script src="http://code.jquery.com/jquery-1.9.1.js"></script>
    <script src="http://code.jquery.com/ui/1.10.3/jquery-ui.js"></script>
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>

</head>

Error Message:

Uncaught ReferenceError: jQuery is not defined          bootstrap.min.js:6
(anonymous function)                                    bootstrap.min.js:6

javascriptjqueryhtmlcsstwitter-bootstrap

Answer №1

Make sure to include jQuery as the first script in your code!

<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css" />
<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap-theme.min.css" />
<link rel="stylesheet" href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css" />

<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>

<script src="http://netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<script src="http://code.jquery.com/ui/1.10.3/jquery-ui.js"></script>

Answer №2

There could be a couple of reasons for this issue:

  1. You might have duplicate jQuery scripts being loaded; try removing one (ideally the older version).
  2. You may be loading bootstrap.min.js before jQuery, which can cause problems (refer to the documentation here).

To resolve this, make sure your script and stylesheet links are in the correct order:

<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css" />
<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap-theme.min.css" />
<link rel="stylesheet" href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css" />

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js" />
<script src="http://netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js" />
<script src="http://code.jquery.com/ui/1.10.3/jquery-ui.js" />

Answer №3

<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
<script src="http://netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>

Make sure to include the jQuery JS file before the Bootstrap file in your code.

Answer №4

I have experimented with different methods and found that this specific sequence delivers optimal results.

  • Start by loading the CSS file
  • Next, load the jQuery library
  • Then, load Bootstrap
  • Finally, load jQuery UI

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