Okay a bit later and I found this:
http://electron.atom.io/docs/api/
I don’t know if it will help or if I should use anything on it so if you have any knowledge of this please advise.
@dyard please, just edit the css/custom.css, don’t change the module code unless u are fixing a bug or adding function (and then don’t tell anyone about it, release a new updated module)
https://forum.magicmirror.builders/topic/6808/css-101-getting-started-with-css-and-understanding-how-css-works?_=1597692865011