How does useMemo improve performance in React?

How does useMemo improve performance in React?

useMemo is a React hook that memoizes the result of a computation, preventing unnecessary recalculations on re-renders.

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

Sure! You can use it like this: const memoizedValue = useMemo(() => computeExpensiveValue(a, b), [a, b]);.

When should I use useMemo in my components?

Use useMemo when you have expensive calculations that depend on specific props or state, and you want to avoid recalculating them on every render.

Are there any downsides to using useMemo?

Yes, overusing useMemo can lead to unnecessary complexity and may not always yield performance benefits, so use it judiciously.