Topic on Project:Support desk

I want to keep my MediaWiki:Common.js file minimal as possible so instead writing JavaScript directly in it I want to call a JavaScript custom file such as example.com/my_custom_javascript.js from inside it.

How could I run that file ("include" that file) from MediaWiki:Common.js?

mw.loader.load("url here");

See also https://www.mediawiki.org/wiki/ResourceLoader/Core_modules#mw.loader.load

Thanks Bawolff, while I do hope to learn of a general JavaScript way (independent of MediaWiki) at least for now that's fine for me.