PageTransitionEvent

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨July 2015⁩.

ThePageTransitionEvent event object is available inside handler functions for thepageshow andpagehide events, fired when a document is being loaded or unloaded.

Constructor

PageTransitionEvent(): Creates a newPageTransitionEvent object.

Instance properties

This interface also inherits properties from its parent,Event.

PageTransitionEvent.persistedRead only: Indicates if the document is loading from a cache.

Example

window.addEventListener("pageshow", (event) => {  if (event.persisted) {    alert("The page was cached by the browser");  } else {    alert("The page was NOT cached by the browser");  }});