defineWebPage({
  // will resolve to ISO 8601 format
  datePublished: new Date(2020, 10, 1)
})

defineWebPage({
  // will be resolved as ['WebPage', 'AboutPage']
  '@type': 'AboutPage',
})

defineWebPage({
  name: 'Page Title',
  image: '/image.jpg',
})

/**
 * A web page.
 * Every web page is implicitly assumed to be declared to be of type WebPage,
 * so the various properties about that webpage, such as breadcrumb may be used.
 */
type ValidSubTypes = 'WebPage' | 'AboutPage' | 'CheckoutPage' | 'CollectionPage' | 'ContactPage' | 'FAQPage' | 'ItemPage' | 'MedicalWebPage' | 'ProfilePage' | 'QAPage' | 'RealEstateListing' | 'SearchResultsPage'
/**
 * A web page.
 * Every web page is implicitly assumed to be declared to be of type WebPage,
 * so the various properties about that webpage, such as breadcrumb may be used.
 */
export interface WebPageSimple extends Thing {
  ['@type']?: Arrayable<ValidSubTypes>
  /**
   * The unmodified canonical URL of the page.
   */
  url?: string
  /**
   * The title of the page.
   */
  name?: string
  /**
   * The page's meta description content.
   */
  description?: string
  /**
   * A reference-by-ID to the WebSite node.
   */
  isPartOf?: NodeRelation<WebSite>
  /**
   * A reference-by-ID to the Organisation node.
   * Note: Only for the home page.
   */
  about?: NodeRelation<Organization>
  /**
   * A reference-by-ID to the author of the web page.
   */
  author?: NodeRelation<Person | string>
  /**
   * The language code for the page; e.g., en-GB.
   */
  inLanguage?: Arrayable<string>
  /**
   * The time at which the page was originally published, in ISO 8601 format; e.g., 2015-10-31T16:10:29+00:00.
   */
  datePublished?: ResolvableDate
  /**
   * The time at which the page was last modified, in ISO 8601 format; e.g., 2015-10-31T16:10:29+00:00.
   */
  dateModified?: ResolvableDate
  /**
   * A reference-by-ID to a node representing the page's featured image.
   */
  primaryImageOfPage?: NodeRelation<ImageObject | string>
  /**
   * A reference-by-ID to a node representing the page's breadrumb structure.
   */
  breadcrumb?: NodeRelation<BreadcrumbList>
  /**
   * An array of all videos in the page content, referenced by ID.
   */
  video?: NodeRelations<VideoObject>
  /**
   * A SpeakableSpecification object which identifies any content elements suitable for spoken results.
   */
  speakable?: unknown
  /**
   * Potential actions for this web page.
   *
   * Note it's on by default for most page types.
   */
  potentialAction?: Arrayable<(ReadAction | unknown)>
}