Thanks to the WebContents Occlusion feature in Chromium, the Page Visibility Web API will now reflect accurately the visibility state of web pages, especially when they are occluded. In other words, the document.visibilityState value will be “hidden” when browser tab/window is covered by one or multiple window(s).

Documentation

Status in Chromium

Blink>DOM


Enabled by default (tracking bug) in:

  • Chrome for desktop release 73

Consensus & Standardization

After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.

  • No signal
  • No signal
  • No signal
  • No signals

Owner

Comments

The WebContents Occlusion feature is supported only on Chrome OS and macOS at this time. Windows support is in progress.

Last updated on 2019-01-21