department-of-veterans-affairs/vets-website

import { useEffect, useState } from 'react';

/**
 * Custom hook pulled from https://usehooks.com/useDebounce/
 * @param {*} value
 * @param {*} delay
 */

function useDebounce(value, delay) {
  // State and setters for debounced value
  const [debouncedValue, setDebouncedValue] = useState(null);
  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 === value && debouncedValue;
}

export default useDebounce;