What is useMemo and when should you use it? useMemo क्या है और इसे कब उपयोग करना चाहिए?

Q: What is useMemo and when should you use it?

const value = useMemo(() => expensiveCalculation(data), [data]);useMemo caches expensive computed values and recomputes them only when dependencies change.

Answer

const value = useMemo(() => expensiveCalculation(data), [data]);

useMemo caches expensive computed values and recomputes them only when dependencies change.

const value = useMemo(() => expensiveCalculation(data), [data]);

useMemo expensive calculations को cache करता है।

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