Title: JavaScript not running on backend
Last modified: January 1, 2021

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# JavaScript not running on backend

 *  Resolved [muttleydosomething](https://wordpress.org/support/users/muttleydosomething/)
 * (@muttleydosomething)
 * [5 years, 3 months ago](https://wordpress.org/support/topic/javascript-not-running-on-backend/)
 * “The block editor requires JavaScript. Please enable JavaScript in your browser
   settings, or try the Classic Editor plugin.”
 * Also every plugin that requires JavaScript gives an error message.
 * I have seen many posts from people having this problem. Unfortunately the only
   response everyone gets is ‘disable your ad blocker’ I have disabled pi hole completely
   and still get this error.
 * I have also tried every modern browser and still get this error.
    I have visited
   [https://enable-javascript.com/](https://enable-javascript.com/) and get this
   reply:
 * “Javascript is enabled in your web browser. If you disable JavaScript, this text
   will change.” I have successfully run Javascript demos from all over the net 
   and everything runs perfectly.
 * So far I have:
    Completely disabled my ad blocker Tried every major browser: 
   Firefox, Chrome, Safari and Edge Tried on both Windows 10 and IOS Successfully
   run multiple Javascript demos from around the web on every browser
 * The ONLY place that Javascript doesn’t run is on the back-end of all of my WordPress.
   org sites. The ‘Search’ function works just fine on the front-end.
 * Having searched all the other related posts I couldn’t find anyone with a solution,
   time goes by and then the topic is closed with no one any better off.
 * All I can think of is it must be my Web Server IIS 10 is somehow filtering scripts?
 * Is there anyone who can actually help?? Many thanks 🙂

Viewing 5 replies - 1 through 5 (of 5 total)

 *  Moderator [t-p](https://wordpress.org/support/users/t-p/)
 * (@t-p)
 * [5 years, 3 months ago](https://wordpress.org/support/topic/javascript-not-running-on-backend/#post-13854150)
 * Your browser can help you identify JavaScript issues or conflicts and [this article can assist you in doing that diagnosis](https://wordpress.org/support/article/using-your-browser-to-diagnose-javascript-errors/).
   This could help identify Visual Editor issues as well.
 *  Thread Starter [muttleydosomething](https://wordpress.org/support/users/muttleydosomething/)
 * (@muttleydosomething)
 * [5 years, 3 months ago](https://wordpress.org/support/topic/javascript-not-running-on-backend/#post-13854221)
 * Thank you t-p for your terrific suggestion.
    Adding define(‘SCRIPT_DEBUG’, true);
   to wp-config.php helped Chrome find the following problem with JavaScript:
 * Refused to execute inline script because it violates the following Content Security
   Policy directive: “script-src ‘self'”. Either the ‘unsafe-inline’ keyword, a 
   hash (‘sha256-/YpbaZxLCFpfmU+h0cXYjk1fkxdbHfO5UXAKf7NKes8=’), or a nonce (‘nonce-…’)
   is required to enable inline execution.
 * Along with many others…
 * /wp-admin/plugins.php line 7 etc…
 * There seems to be a problem with anything that even mentions
    <script type=”text/
   javascript”> etc…
 * Is there a simple way you know of to fix this? Thanks again!
    -  This reply was modified 5 years, 3 months ago by [muttleydosomething](https://wordpress.org/support/users/muttleydosomething/).
 *  Thread Starter [muttleydosomething](https://wordpress.org/support/users/muttleydosomething/)
 * (@muttleydosomething)
 * [5 years, 3 months ago](https://wordpress.org/support/topic/javascript-not-running-on-backend/#post-13854340)
 * I have found that my problem was caused by my Web Server (IIS 10) In the HTTP
   Response Headers. Having Content-Security-Policy script-src ‘self’ was limiting
   the scripts that could run stopping the use of many plugins, including WordPress
   itself from working.
 * Content-Security-Policy is worth looking further into!
 * Thanks to t-p for pointing me in the right direction
 *  Thread Starter [muttleydosomething](https://wordpress.org/support/users/muttleydosomething/)
 * (@muttleydosomething)
 * [5 years, 3 months ago](https://wordpress.org/support/topic/javascript-not-running-on-backend/#post-13854341)
 * 🙂
 *  Moderator [t-p](https://wordpress.org/support/users/t-p/)
 * (@t-p)
 * [5 years, 3 months ago](https://wordpress.org/support/topic/javascript-not-running-on-backend/#post-13854516)
 * You are welcome 🙂

Viewing 5 replies - 1 through 5 (of 5 total)

The topic ‘JavaScript not running on backend’ is closed to new replies.

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 5 replies
 * 3 participants
 * Last reply from: [t-p](https://wordpress.org/support/users/t-p/)
 * Last activity: [5 years, 3 months ago](https://wordpress.org/support/topic/javascript-not-running-on-backend/#post-13854516)
 * Status: resolved

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