'JQuery' is undefined

0 I do not know whether you guys found the solution to your problem or not. I was facing the same problem and going nuts to figure out why do I get "jQuery is undefined" error on the plugins i use. I tried all the solutions i get from the internet but no luck at all.

But, suddenly something splash on my mind that may be the script files should be in order. So, I moved the jquery referece to first position and everything start working like charm.

Remember guys, if you're using any plugins with jquery, make sure you use the folloing order of setting reference to those fiels.

1. reference to the jquery library
2. reference to the other subsequent plug-in (dependant) libraries and so on...

e.g.:

1. "script src="js/jquery-1.3.2.min.js" type="text/javascript"...
2. "script src="js/jqDnR.min.js" type="text/javascript"...
3. "script src="js/jquery.jqpopup.min.js" type="text/javascript"...
4. "script src="js/jquery.bgiframe.min.js" type="text/javascript"...

Always make sure you must put the jquery reference to first and then the subsequent libraries.

Hope, this solves your problem especially when you use with MasterPages. Its very strange that it works no matter what order you use when you don't use MasterPages but when you do, then it somehow requres the proper order.

Good luck and happy coding,

Vincent D'Souza

Try using Firebug 'Net' tab to see if the file gets loaded.

You can also configure Firebug to fail on all errors and see when the error happens as compared to when jQuery gets loaded.

After Using the FIrebug, I found out the files were not found as the relative path for the files doesn;t work. TO resolve the problem, we should use the Url.Content Method to reslove the path. For example:

<script src="<%= Url.Content("~/Scripts/jquery-1.2.6.js")%>" type="text/javascript"></script>