useDebouncedCallback Hook Fixes Stale Closures in Debounced React Callbacks

A DEV Community article describes a small React hook, useDebouncedCallback, that prevents delayed callbacks from running with outdated state. The author shows a search box whose debounced function captures an empty query because of a stale closure caused by an empty dependency array. Adding the query to the dependencies fixes the stale value but creates a new scheduler on every keystroke, which breaks timer clearing and memoization. Reading state through a ref is also shown to be unsafe during concurrent rendering, and wrapping the callback in useCallback still changes identity on each keystroke. The proposed hook keeps the scheduler stable while reading the latest callback through a ref at the moment the timer fires.