Using ES6 features (eg classes)

[ConsciousCode]

Currently node-x11 is using old idioms for inheritance, which I think is unnecessary at this point. Node has long supported most of ES6, and the same applies to virtually every other browser (if portability is even a concern). Using these features will enhance code readability, reduce potential errors introduced through boilerplate, and eliminate the need for certain utilities like util.inherits. I also see a lot of comments questioning the speed of certain utility hacks, many of which have dedicated ES6 functions.

I'd be glad to make these changes myself, starting with the least intrusive feature, classes (which are indistinguishable from the old idioms), and going on with updating the content with ES6 idioms.

[sidorares]

Personally I don't see that very high on my priority list.
re code readability - I really want to reformat all code and add prettier + eslint as part of automatic code check / transformation ( see sidorares/dbus-native#172 for example of similar work )

Performance wise I think we can get huge benefit by switching from string based parser to binary Buffers ( it was created initially before Buffer existed at all in node back in 2010 )

[sidorares]

But in general happy to gradually move to new language features - it's safe to require 4.x as minimum node version, thanks for the offer @ConsciousCode