function debounce<T extends (...args: unknown[]) => void>(
  fn: T,
  delay: number
): (...args: Parameters<T>) => void {
  let timer: ReturnType<typeof setTimeout>
  return (...args: Parameters<T>) => {
    clearTimeout(timer)
    timer = setTimeout(() => fn(...args), delay)
  }
}

// Usage:
const handleSearch = debounce((query: string) => {
  console.log('Searching for:', query)
}, 300)