Typescript Debouncing Utility Function.

debounced.ts

type FunctionType = (...args: any[]) => any;

function debounced<T extends FunctionType>(
  func: T,
  duration: number
): (...args: Parameters<T>) => ReturnType<T> {
  let timeoutId: NodeJS.Timeout;
  let result: ReturnType<T>;

  return (...args: Parameters<T>) => {
    timeoutId && clearTimeout(timeoutId);
    timeoutId = setTimeout(() => {
      result = func(...args);
    }, duration);
    return result;
  };
}