[rwalle]

It's understandable of you haven't touched JS for a few years. But if you work with JS/TS a lot and are not aware of/already using many of the features listed here, you need to ask yourself (or maybe your company) if that's ok. A lot of these are very nice features that are used daily -- they help code to be cleaner and more concise, and you can work more productively.

[thrashh]

Not to mention -- most of these features have been in other languages for years. So in this case, JS/TS have been behind and are just catching up to what you'd find everywhere else.