Public class fields are shipping in @v8js v7.2 and Chrome 72!
Private class fields are coming soon.
https://developers.google.com/web/updates/2018/12/class-fields …pic.twitter.com/1LhVRAaMZn
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Ah. Do you think then it’s possible to have an override feature whereby developers can see all the fields of the object? In the spirit of the dynamic and flexible language JS is of course 
Having a limited public API is essential to keep backward compatibility and still allow change. A convention is not good enough to solve this as you need to know it to know you shouldn't use some elements of the code. Private fields are baked into the language, much clearer.
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