import { useState, useEffect } from 'react'; function useDebounce(value, delay = 500) { // State and setters for debounced value const [debouncedValue, setDebouncedValue] = useState(value); useEffect( () => { // Update debounced value after delay const handler = setTimeout(() => { setDebouncedValue(value); }, delay); // Cancel the timeout if value changes (also on delay change or unmount) // This is how we prevent debounced value from updating if value is changed ... // .. within the delay period. Timeout gets cleared and restarted. return () => { clearTimeout(handler); }; }, [value, delay], // Only re-call effect if value or delay changes ); return debouncedValue; } export default useDebounce;