const validatePlaceholderImageUrl = (placeholderUrlOrFalse: unknown): string | false => {
  if (!placeholderUrlOrFalse || placeholderUrlOrFalse === 'false') {
    return false;
  }

  if (typeof placeholderUrlOrFalse === 'string') {
    return placeholderUrlOrFalse;
  }

  throw new TypeError('placeholderUrlOrFalse must be a string or falsy.');
};

export default validatePlaceholderImageUrl;