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