As part of the work of the frontend standards group
https://gerrit.wikimedia.org/r/#/c/260071/ adds require and
module.exports to MediaWiki ResourceLoader. This will make it easier
to share code outside MediaWiki and with nodejs systems as well as
discouraging the overloading of the mediawiki variable.
I'm looking for code review at the moment. If you are familiar with
ResourceLoader's internals I'd appreciate your input.
See
https://phabricator.wikimedia.org/T108655 for further background