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Hooks in Depth
Pause here and make sure the main ideas feel clear before moving to the next chapter.
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What you should understand now
Use common hooks without making components harder than they need to be.
useRef basics
Keep a value without causing a render.
useMemo basics
Memoize expensive calculated values.
Custom hooks
Extract reusable stateful logic.
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Use this quick review if anything still feels unclear.
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