This is a decent list. Absolutely agree that you should know the core language and how asynchronous/callback style code works (and promises/async-await for newe

This is a decent list. Absolutely agree that you should know the core language and how asynchronous/callback style code works (and promises/async-await for newer code), and agree that knowing newer ES6 and beyond is also very useful. However, there's a lot of legacy code that was designed to work with older browsers and companies that aren't willing to invest in new tooling so you have to be careful and really understand the basics without relying on the tools like Babel. One thing I will disagree with is that you don't need to learn/know Node.js anything to be a professional or serious JS developer. There are a lot of very proficient front end developers that never have and never will touch Node.js, even if it is Javascript.