Board Thread:General Discussion/@comment-45534093-20200420135043/@comment-9605025-20200422223129

That could also work. But then you are relying on the viewer's set-up to be able to do it. Some users block JS and others may be using browsers that follow an outdated JS specification. Though I suppose the popular response to that last issue is "well, screw them." (not that I agree with that stance).

You could write your JS to work using older specs (I write mine to work with IE11) but whether or not it is loaded at all will depend on how Fandom writes the loading/global script. At the moment, for example, the current global script is not compatible with IE11 so it doesn't matter that my scripts are.