Title: Various JavaScript console errors
Last modified: September 26, 2017

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# Various JavaScript console errors

 *  Resolved [Abruptive](https://wordpress.org/support/users/alexandrudoda/)
 * (@alexandrudoda)
 * [8 years, 6 months ago](https://wordpress.org/support/topic/various-javascript-console-errors/)
 * Hello! I have an issue with my site where Autoptimize generates 2 (and sometimes
   3) console errors.
 *     ```
       notes-common-v2.js:32 Uncaught ReferenceError: Backbone is not defined
           at notes-common-v2.js:32
           at notes-common-v2.js:158
       ```
   
 *     ```
       Uncaught ReferenceError: _ is not defined
           at admin-bar-v2.js:2
       ```
   
 *     ```
       Uncaught TypeError: Cannot read property 'getSlick' of undefined
           at n.fn.init.i.fn.slick (autoptimize_85bc524c3825cb0b0a25431545845c02.js:75)
           at HTMLUListElement.<anonymous> (autoptimize_85bc524c3825cb0b0a25431545845c02.js:74)
           at Function.each (jquery.js:2)
           at n.fn.init.each (jquery.js:2)
           at e.asNavFor (autoptimize_85bc524c3825cb0b0a25431545845c02.js:74)
           at e.slideHandler (autoptimize_85bc524c3825cb0b0a25431545845c02.js:75)
           at e.changeSlide (autoptimize_85bc524c3825cb0b0a25431545845c02.js:74)
           at e.d [as changeSlide] (jquery.js:2)
           at e.refresh (autoptimize_85bc524c3825cb0b0a25431545845c02.js:74)
           at e.checkResponsive (autoptimize_85bc524c3825cb0b0a25431545845c02.js:74)
       ```
   
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fvarious-javascript-console-errors%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

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

 *  Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/)
 * (@optimizingmatters)
 * [8 years, 6 months ago](https://wordpress.org/support/topic/various-javascript-console-errors/#post-9531452)
 * afternoon [@alexandrudoda](https://wordpress.org/support/users/alexandrudoda/);
   
   No errors that I can see, so could very well only be the case for logged in users.
   if not, or if you want to fix anyway, you’ll have to go through the troubleshooting
   tips in [the FAQ](https://wordpress.org/plugins/autoptimize/faq/) (you’ll probably
   want to start by excluding backbone and underscore JS from optimization).
 * hope this clarifies,
    frank
 *  Thread Starter [Abruptive](https://wordpress.org/support/users/alexandrudoda/)
 * (@alexandrudoda)
 * [8 years, 6 months ago](https://wordpress.org/support/topic/various-javascript-console-errors/#post-9532484)
 * Thank you Frank!

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

The topic ‘Various JavaScript console errors’ is closed to new replies.

 * ![](https://ps.w.org/autoptimize/assets/icon-256X256.png?rev=2211608)
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 * 2 replies
 * 2 participants
 * Last reply from: [Abruptive](https://wordpress.org/support/users/alexandrudoda/)
 * Last activity: [8 years, 6 months ago](https://wordpress.org/support/topic/various-javascript-console-errors/#post-9532484)
 * Status: resolved