How does using useCallback improve performance in React?

How does using useCallback improve performance in React?

Using useCallback helps prevent unnecessary re-renders by memoizing functions, ensuring they only change when dependencies do.

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

Sure! Here's a simple example:

const memoizedCallback = useCallback(() => {
  doSomething(a, b);
}, [a, b]);

This memoizes the function so it only updates when 'a' or 'b' change.

What are the downsides of using useCallback?

The main downside is that it can add complexity to your code. Overusing it can lead to performance issues if not managed properly.

When should I avoid using useCallback?

Avoid using useCallback for simple functions or when the performance gain is negligible, as it may complicate your code unnecessarily.