What are some examples of using useMemo in React?

Can you explain what useMemo is in React?

Sure! useMemo is a React hook that helps optimize performance by memoizing the result of a computation.

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

Absolutely! Here's a simple example:

const memoizedValue = useMemo(() => computeExpensiveValue(a, b), [a, b]);

This will only recompute the value when 'a' or 'b' changes.

When should I use useMemo?

You should use useMemo when you have expensive calculations that don't need to run on every render, helping to improve performance.

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.