What are the best practices for using useCallback in React?
Using useCallback helps optimize performance by memoizing functions. Best practices include using it for functions that are passed as props to child components, especially if those components rely on reference equality to prevent unnecessary renders.
Can you give an example of when to use it?
Sure! If you have a child component that receives a callback prop, you should wrap that callback in useCallback to prevent the child from re-rendering unless its dependencies change.
Are there any downsides to using useCallback?
Yes, overusing useCallback can lead to unnecessary complexity and may not always yield performance benefits. It's best to use it when you have performance issues.
How does useCallback compare to useMemo?
useCallback is specifically for memoizing functions, while useMemo is for memoizing values. They both help optimize performance but serve different purposes.
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