Board Thread:Support Requests - Getting Technical/@comment-35337233-20190520021903/@comment-9605025-20190520142134

I don't see how that makes sense. If Wikia (or MediaWiki) only supports up to ES4, how are scripts like Fetch able to use ES6 functions? If the answer is polyfills, then why hasn't Wikia made polyfills that work for IE11 (which supports ES5)?