react life cycle what is difference between useCallback and useMemo

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Accepted Answer

useCallback and useMemo are both hooks used to optimize performance in React by memoizing values and functions.

useCallback is used to memoize functions and prevent unnecessary re-renders when passed as props to child components.
useMemo is used to memoize values and prevent unnecessary re-computations when used in the component's render method.
Both hooks take a dependency array as a second argument to determine when to recompute the memoized value or function.
useCallback is typically used for event handlers or functions that are passed as props, while useMemo is used for expensive computations or calculations.
It's important to note that while both hooks can improve performance, they should be used judiciously and only when necessary to avoid unnecessary complexity in the code.

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