VS2012 Web Forms Project breaks after upgrading JQuery to V 1.8.1

Question

I created a web Forms project using Visual Studio 2012 and then upgraded JQuery library to 1.8.1 using nuget package manager. When I try to run the project, I get the following error. Any ideas?

> Unhandled exception at line 6, column 2 in
> http://localhost:49618/Scripts/jquery-ui-1.8.23.js
> 
> 0x800a1391 - Microsoft JScript runtime error: 'jQuery' is undefined

I just noticed that this error occurs only with IE9, but not with Chrome or Firefox browsers.

Answer 1

I had a similar error which was due to a mistmatch between the jquery and jquery-ui versions. Upgrading to the latest release of jquery solved it: http://docs.jquery.com/Downloading_jQuery#Current_Release

Answer 2

Finally I figured this out. My project also contains a JuiceUI package, and it seems to be not compatible with latest version of JQuery. I uninstalled this package and it worked fine.