[Suggestion]: Make clear why Ref was used in the third solution

Summary

The solution for the third challenge, "Fix debouncing," does not require a Ref. Moving the let timeoutID; to the top inside the DebouncedButton component will fix the debouncing. Either point this out in the explanation or make it re-render so the solution requires Ref.

Page

https://react.dev/learn/referencing-values-with-refs

Details

Since code example does not use State, there's no re-rendering, and so there's no need to use Ref to remember anything across re-renders. The page mentions that Refs are not used often; although future-proof, I think the example should only use Ref when necessary.

Inizia dalla pagina “Referencing Values with Refs” ed esamina la terza sfida, “Fix debouncing”, inclusi la spiegazione e la soluzione. Il lavoro è completato quando la documentazione spiega perché viene usato Ref, oppure l’esempio viene modificato in modo che il nuovo rendering renda necessario Ref; verifica la pagina renderizzata e il testo della sfida.