What are the best practices for using useMemo in React?

What are the best practices for using useMemo in React?

Using useMemo can optimize performance by memoizing expensive calculations. Best practices include using it for expensive computations and avoiding unnecessary dependencies.

Can you give an example of when to use useMemo?

Sure! If you have a component that performs a heavy calculation based on props, you can wrap that calculation in useMemo to prevent it from running on every render.

Are there any common mistakes to avoid with useMemo?

Yes, a common mistake is overusing useMemo. Only use it when necessary, as it can add complexity without significant benefits.

How does useMemo differ from useCallback?

useMemo returns a memoized value, while useCallback returns a memoized function. Use useMemo for values and useCallback for functions.

When should I avoid using useMemo?

Avoid using useMemo for simple calculations or when the performance gain is negligible, as it can complicate your code.