react-use-callback

You can use useCallback to memoize function definitions and maintain their identity across re-renders. This prevents unnecessary re-renders when passing stable callbacks to memoized child components in React.

Use useCallback for React performance optimization when passing callbacks to memoized children, using callbacks as effect dependencies, or returning stable functions from custom hooks. Avoid useCallback when it does not provide a measurable performance benefit.

Avoid stale closures in useCallback by maintaining correct dependency arrays and preferring updater patterns. Updater patterns ensure you access the latest state without needing to include the state variable directly in the callback's dependencies.

Yes, you can use stable callbacks as dependencies inside React useEffect. Include the memoized callback in the effect's dependency array, or move the logic directly inside the effect to maintain correct behavior and avoid stale data.

The main limitation of useCallback is that applying it indiscriminately adds overhead without benefit. You should avoid useCallback when it is not beneficial, such as on functions that are never passed to memoized children or used as effect dependencies.