react-use-callback

Use useCallback to prevent React re-renders when passing callbacks to memoized children, using functions as effect dependencies, or returning functions from custom hooks. It stabilizes function references to avoid triggering unnecessary component updates.

Fix stale closures in React hooks by using functional state updaters within useCallback. This pattern reduces dependency array entries and ensures your callback always accesses the latest state without requiring the state variable itself as a dependency.

The best way to handle functions as useEffect dependencies is either wrapping them with useCallback to stabilize the reference or moving the function definition directly inside the effect to simplify dependencies and avoid unnecessary memoization complexity.

Wrapping every function with useCallback does not always improve React performance. It adds needless complexity and memory overhead. Memoization yields real benefits only when the stabilized callback is passed to memoized children or used as an effect dependency.

Safely refactor a React component to add useCallback by carefully mapping dependency arrays and verifying that updater functions handle state correctly. Ensure every external variable used inside the callback is included to preserve original component behavior.