1. documentpictureinpicture api

2. documentpictureinpictureevent api

3. documentpictureinpictureevent api: `documentpictureinpictureevent()` constructor

4. documentpictureinpictureevent api: window

5. documentpictureinpicture api: `enter` event

6. documentpictureinpicture api: requestwindow

7. documentpictureinpicture api: requestwindow: `disallowreturntoopener` option

8. documentpictureinpicture api: requestwindow: `preferinitialwindowplacement` option

9. documentpictureinpicture api: window

10. document api: exitpictureinpicture

11. document api: pictureinpictureelement

12. document api: pictureinpictureenabled

13. window api: documentpictureinpicture