What are the common mistakes when using useMemo and useCallback?

What are the common mistakes when using useMemo and useCallback in React?

Some common mistakes include not using them when necessary, misunderstanding their dependencies, and overusing them.

Can you explain how dependencies work with useMemo?

Sure! The dependencies array determines when the memoized value should be recalculated. If any value in the array changes, useMemo will recompute.

What about useCallback? How does it differ?

useCallback is similar but is used to memoize functions instead of values. It helps prevent unnecessary re-renders of child components.

Are there performance implications if I misuse these hooks?

Yes, misusing them can lead to performance issues, such as unnecessary re-renders or stale values, which can degrade app performance.

How can I determine when to use these hooks?

Use them when you have expensive calculations or functions that are passed to child components, and you want to optimize rendering.