1. Picture element

    A responsive images method to control which image resource a user agent presents to a user, based on resolution, media query and/or support for a particular image format

  2. document api: pictureinpictureelement

  3. htmlpictureelement api

  4. htmlvideoelement api: disablepictureinpicture

  5. htmlvideoelement api: `enterpictureinpicture` event

  6. htmlvideoelement api: `leavepictureinpicture` event

  7. htmlvideoelement api: requestpictureinpicture

  8. shadowroot api: pictureinpictureelement

  9. html element: video: disablepictureinpicture