1. PageTransitionEvent

    Fired at the Window when the page's entry in the session history stops being the current entry. Includes the `pageshow` and `pagehide` events.

  2. Portals

    Portals enable seamless navigation between sites or pages. A new page can be loaded as an inset using the `<portal>` element (similar to an iframe) which can then seamlessly transition to the new navigated state when "activated".

  3. pagerevealevent api: viewtransition

  4. pageswapevent api: viewtransition

  5. pagetransitionevent api

  6. pagetransitionevent api: `pagetransitionevent()` constructor

  7. pagetransitionevent api: persisted