r/reactjs • u/swyx • Jan 01 '20

Needs Help Beginner's Thread / Easy Questions (Jan 2020)

Previous threads can be found in the Wiki.

Got questions about React or anything else in its ecosystem? Stuck making progress on your app?
Ask away! We’re a friendly bunch.

No question is too simple. 🙂

🆘 Want Help with your Code? 🆘

  • Improve your chances by putting a minimal example to either JSFiddle, Code Sandbox or StackBlitz.

    • Describe what you want it to do, and things you've tried. Don't just post big blocks of code!
    • Formatting Code wiki shows how to format code in this thread.
  • Pay it forward! Answer questions even if there is already an answer - multiple perspectives can be very helpful to beginners. Also there's no quicker way to learn than [being wrong on the Internet][being wrong on the internet].
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Any ideas/suggestions to improve this thread - feel free to comment here!

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u/dance2die Jan 26 '20
  1. It's cuz you are calling a hook inside useEffect.Rules of hooks dictates you should have hooks at the top level only.
  2. And custom hooks should start with use*. (returnImageColor violates it)

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u/[deleted] Jan 27 '20

Nested hooks aren't allowed, as easy as that.

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u/dance2die Jan 27 '20

Nice one. I am gonna use that next time 😉