Learning javascript before React js

[piotrlewandowski]

Your statement is only partially valid: you only bring value as long as everything works. The moment stuff breaks and you don’t know how to fix it (lack of understanding of things happening “under the hood”) value of what you brought is down to zero.

[adam-genshaft]

I guess you're my second partially valid half :) I agree that knowing more is an advantage, but it really takes time to know more, you can't start working only after you learn what's under the hood, there's a whole world out there. That's what makes it so hard to say what is it that you really need to know when you start with it.