The new version of the official docs is currently in Beta and this is really, really good: https://beta.reactjs.org/learn https://beta.reactjs.org/learn (In fa

The new version of the official docs is currently in Beta and this is really, really good: https://beta.reactjs.org/learn https://beta.reactjs.org/learn (In fact, I'll go further than this and add that the section on "Escape Hatches" should be re-read by senior/lead engineers, as many have misconceptions due to learning concepts ad-hoc from code of mixed quality: https://beta.reactjs.org/learn/escape-hatches https://beta.reactjs.org/learn/escape-hatches)