Custom React Hooks

import { useState, useEffect } from 'react';

// Custom hook for debounced values
function useDebounce<T>(value: T, delay: number): T {
  const [debouncedValue, setDebouncedValue] = useState<T>(value);

  useEffect(() => {
    const timer = setTimeout(() => {
      setDebouncedValue(value);
    }, delay);

    return () => clearTimeout(timer);
  }, [value, delay]);

  return debouncedValue;
}

// Usage
function SearchInput() {
  const [query, setQuery] = useState('');
  const debouncedQuery = useDebounce(query, 500);

  useEffect(() => {
    // Search API call with debouncedQuery
  }, [debouncedQuery]);

  return <input value={query} onChange={e => setQuery(e.target.value)} />;
}