DaffRestoreableCanonicalService

Manages the page's canonical URL.

import { DaffRestoreableCanonicalService } from '@daffodil/seo'

@Injectable()
class DaffRestoreableCanonicalService implements DaffSeoRestoreableServiceInterface<string, string> {
  get upsertCache(): string
  get restoreCache(): string
  get canonicalLink(): HTMLLinkElement
  upsert(url: string): void
  clear(): void
  restore(): void
  emptyRestoreCache(): void
}

Properties

Name	Type	Description
upsertCache	string	Stores the upserted SEO data since the last clear. This represents the SEO data managed by the service.
restoreCache	string	Stores the SEO data present on the current document when it is removed by `clear`. SEO data in this cache can be upserted back into the document with `restore`.
canonicalLink	HTMLLinkElement	The canonical link element.
upsert	void	Adds the SEO info to the page. Adds the info to the upsert cache.
clear	void	Removes all of the added SEO info from the page. Only removes what was previously added by this service, that is, what is in the upsert cache. The SEO data that was removed is then moved to the restore cache.
restore	void	Restores the previously cleared SEO info to the page.
emptyRestoreCache	void	Empties the restore cache. Does not affect upsert cache.