Advanced Hook Info

Example: "Everything you were taught about SEO in 2025 is now completely obsolete."

function usePrevious(value) const ref = useRef(); useEffect(() => ref.current = value; , [value]); return ref.current;

// Parent usage: const ref = useRef(); <FancyInput ref=ref /> ref.current.shake(); advanced hook

It should do one thing perfectly (e.g., useLocalStorage ).

Instead of writing fetch , loading , error states in every component, create a hook. Example: "Everything you were taught about SEO in

// Parent Component function Parent() const inputRef = useRef(); return ( <> <FancyInput ref=inputRef /> <button onClick=() => inputRef.current.focus()>Focus Input</button> </> );

Evoking immediate curiosity, fear of missing out (FOMO), or frustration. Before diving into advanced hooks, you must understand

Before diving into advanced hooks, you must understand why hooks behave the way they do.

function formReducer(state, action) switch (action.type) case 'fetching': return status: 'loading', data: null, error: null ; case 'success': return status: 'idle', data: action.payload, error: null ; case 'error': return status: 'idle', data: null, error: action.payload ; default: throw new Error('Unknown action');