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You write a component that tracks window width with useState, useEffect, and a resize listener. A week later you need the same thing in another c

Open almost any React codebase and you'll find useMemo and useCallback wrapped around things that don't need them: a string concatenation, an inl

Most developers meet useRef as "the hook for focusing an input." You attach it to an element, call ref.current.focus(), and move on. That's a fin

You add a console.log inside useEffect, open the browser, and see it printed twice. Your API request shows up twice in the Network tab. An analyt

useEffect is the hook people get wrong most often, and the dependency array is usually where it goes wrong. Leave a value out and your effect works

Every React component that remembers something uses either useState or useReducer. Most of the time useState is the obvious pick: a boolean for