April 2019 web platform update

Now available in Chrome

Limited availability

• Background fetch: Background fetch downloads data in the background even when the web page is closed. Learn more.

• Intersection observer visibility tracking: The trackVisibility parameter for the IntersectionObserver constructor enables tracking the visibility of an element, to detect if it may be obscured by other content or visual effects. Also known as IntersectionObserver v2. Learn more.

Now available in Chrome Android

Limited availability

• Background fetch: Background fetch downloads data in the background even when the web page is closed. Learn more.

• Intersection observer visibility tracking: The trackVisibility parameter for the IntersectionObserver constructor enables tracking the visibility of an element, to detect if it may be obscured by other content or visual effects. Also known as IntersectionObserver v2. Learn more.