Board Thread:Support Requests - Getting Technical/@comment-26404729-20170322031840/@comment-9605025-20170322083639

I don't think you can.
 * 1) JS pages are interpreted as JS files, not regular MediaWiki article pages.
 * 2) Changes to JS need to be vetted by Wikia so using transclusion would potentially be a means of circumventing the review process. As such, I find it hard to believe that Wikia would allow that; even if JS or the way MediaWiki works with JS does.