When should I use useMemo in React?

When should I use useMemo in React?

You should use useMemo when you want to optimize performance by memoizing expensive calculations or components.

Can you give me an example of how to use it?

Sure! You can use it like this: const memoizedValue = useMemo(() => computeExpensiveValue(a, b), [a, b]); This will only recompute the value when a or b changes.

Are there any downsides to using useMemo?

Yes, overusing useMemo can lead to unnecessary complexity and might not always provide a performance boost.

How does it compare to useCallback?

useMemo is for memoizing values, while useCallback is for memoizing functions. They serve similar purposes but are used in different contexts.