good npm modules for creating classes in javascript

Starting on a new project. So far I have been creating classes in my javascript in the way explained - here. But now that we have so many NPMs, I thought there must be some npm that would help me create JS classes in some better, neat way. In my search, I found some - like this - better-js-class. This definitely looks cleaner, but I didn't find much documentation on their git-page. So before I zero in on this npm, I thought of seeking some advise and suggestion here if someone may recommend some other npm, for this purpose, that I may have missed.