Window: pagereveal event

The pagereveal event is fired when a document is first rendered, either when loading a fresh document from the network or activating a document (either from back/forward cache (bfcache) or prerender).

This is useful in the case of cross-document (MPA) view transitions for manipulating an active transition from the inbound page of a navigation. For example, you might wish to skip the transition, or customize the inbound transition animation via JavaScript.

Syntax

Use the event name in methods like addEventListener(), or set an event handler property.

js
addEventListener("pagereveal", (event) => {});
onpagereveal = (event) => {};

Event type

A PageRevealEvent. Inherits from Event.

Event PageRevealEvent

Event properties

PageRevealEvent.viewTransition Read only

Returns the ViewTransition object representing the inbound cross-document view transition, if one is active when the event is fired. If this is not the case, it returns null.

Examples

js
window.addEventListener("pagereveal", async (e) => {
  // If the "from" history entry does not exist, return
  if (!navigation.activation.from) return;

  // Only run this if an active view transition exists
  if (e.viewTransition) {
    const fromUrl = new URL(navigation.activation.from.url);
    const currentUrl = new URL(navigation.activation.entry.url);

    // Went from profile page to homepage
    // ~> Set VT names on the relevant list item
    if (isProfilePage(fromUrl) && isHomePage(currentUrl)) {
      const profile = extractProfileNameFromUrl(fromUrl);

      // Set view-transition-name values on the elements to animate
      document.querySelector(`#${profile} span`).style.viewTransitionName =
        "name";
      document.querySelector(`#${profile} img`).style.viewTransitionName =
        "avatar";

      // Remove names after snapshots have been taken
      // so that we're ready for the next navigation
      await e.viewTransition.ready;
      document.querySelector(`#${profile} span`).style.viewTransitionName =
        "none";
      document.querySelector(`#${profile} img`).style.viewTransitionName =
        "none";
    }

    // Went to profile page
    // ~> Set VT names on the main title and image
    if (isProfilePage(currentUrl)) {
      // Set view-transition-name values on the elements to animate
      document.querySelector(`#detail main h1`).style.viewTransitionName =
        "name";
      document.querySelector(`#detail main img`).style.viewTransitionName =
        "avatar";

      // Remove names after snapshots have been taken
      // so that we're ready for the next navigation
      await e.viewTransition.ready;
      document.querySelector(`#detail main h1`).style.viewTransitionName =
        "none";
      document.querySelector(`#detail main img`).style.viewTransitionName =
        "none";
    }
  }
});

Note: See List of Chrome DevRel team members for the live demo this code is taken from.

Specifications

Specification
HTML Standard
# event-pagereveal

Browser compatibility

BCD tables only load in the browser

See also