Function isPlainObject

src/is.ts:9–17

(
  payload: any
)

export const isNull = (payload: any): payload is null => payload === null;

export const isPlainObject = (
  payload: any
): payload is { [key: string]: any } => {
  if (typeof payload !== 'object' || payload === null) return false;
  if (payload === Object.prototype) return false;
  if (Object.getPrototypeOf(payload) === null) return true;

  return Object.getPrototypeOf(payload) === Object.prototype;
};

export const isEmptyObject = (payload: any): payload is {} =>
  isPlainObject(payload) && Object.keys(payload).length === 0;