Title: jQuery Errors
Last modified: August 21, 2016

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# jQuery Errors

 *  Resolved [vgl_andy](https://wordpress.org/support/users/vgl_andy/)
 * (@vgl_andy)
 * [12 years, 1 month ago](https://wordpress.org/support/topic/jquery-errors-3/)
 * I have a somewhat old install of WordPress that I have updated over the years
   and added various plugins to. I haven’t really touched the PHP files manually.
   I am getting multiple JS errors about “type of undefined” on my pages that I 
   think is breaking some plugin functionality. After doing some research I found
   that this is generally related to jQuery not being referenced early enough on
   the page or something like that.
 * Is anyone able to take a look at my source / errors at [http://vgloft.com](http://vgloft.com)
   and give me some insight on maybe what I can do to resolve these errors?
 * > Uncaught TypeError: undefined is not a function jquery.form.min.js?ver=3.50.0-
   > 2014.02.05:11
   >  Uncaught TypeError: Cannot read property ‘extend’ of undefined
   > scripts.js?ver=3.8:6 Uncaught TypeError: undefined is not a function

Viewing 2 replies - 1 through 2 (of 2 total)

 *  [esmi](https://wordpress.org/support/users/esmi/)
 * (@esmi)
 * [12 years, 1 month ago](https://wordpress.org/support/topic/jquery-errors-3/#post-4875490)
 * Have you tried:
 * – deactivating **all** plugins to see if this resolves the problem. If this works,
   re-activate the plugins one by one until you find the problematic plugin(s).
 * – switching to the default theme to rule out any theme-specific problems.
 * – [resetting the plugins folder](http://codex.wordpress.org/FAQ_Troubleshooting#How_to_deactivate_all_plugins_when_not_able_to_access_the_administrative_menus.3F)
   by FTP or PhpMyAdmin. Sometimes, an apparently inactive plugin can still cause
   problems.
 * – re-uploading all files & folders – **except** the wp-content folder and wp-
   config.php & root .htaccess files – from a **fresh** download of WordPress. Make
   sure that you delete the old copies of files & folder before uploading the new
   ones.
 *  Thread Starter [vgl_andy](https://wordpress.org/support/users/vgl_andy/)
 * (@vgl_andy)
 * [12 years, 1 month ago](https://wordpress.org/support/topic/jquery-errors-3/#post-4875492)
 * Thanks esmi, ill run through these steps. I am gonna mark this as resolved because
   after deactivating all of the plugins I am no lnger getting the errors so I should
   be able to find the problem child. Thanks so much!!!!

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘jQuery Errors’ is closed to new replies.

## Tags

 * [javascript](https://wordpress.org/support/topic-tag/javascript/)
 * [jquery](https://wordpress.org/support/topic-tag/jquery/)

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 2 replies
 * 2 participants
 * Last reply from: [vgl_andy](https://wordpress.org/support/users/vgl_andy/)
 * Last activity: [12 years, 1 month ago](https://wordpress.org/support/topic/jquery-errors-3/#post-4875492)
 * Status: resolved

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