Board Thread:Support Requests - Designing Your Wiki/@comment-44190734-20200215210305/@comment-9605025-20200215220938

The issue is that you didn't add the JS in the correct place. MediaWiki:ImportJS is a dedicated page for listing scripts you want to import. It is not a JS page where you can set configuration settings of those scripts. That must be done using either MediaWiki:Common.js or MediaWiki:Wikia.js.

To use those pages, your wiki must have the JS review process enabled. If it is not already enabled (it isn't on your wiki), you will need to to staff and ask them to enable the JS review process. It may take a few US business days for them to reply to your request.

Once you have added the relevant JS to set the configuration settings, you will need to submit the JS page for approval. Again, usually a few US business days. Until a revision is approved, the wiki will continue to use the most recently approved revision. If you want to test the current revision, you can use the JS test mode.