Upstream Document Picture-in-Picture API

[vinhill]

• At least two implementers are interested (and none opposed):
  • Gecko
  • …
• Tests are written and can be reviewed and commented upon at:
  • https://wpt.fyi/results/document-picture-in-picture?label=experimental&label=master&aligned
• Implementation bugs are filed:
  • Chromium: Already shipped (desktop only)
  • Gecko: Already shipped (desktop only)
  • WebKit: Open standard position Document Picture in Picture API WebKit/standards-positions#41
• Corresponding HTML AAM & ARIA in HTML issues & PRs:
• MDN issue is filed: …
• The top of this comment includes a clear commit message to use.

Fixes #12309

@zcorpan @annevk @steimelchrome

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/browsing-the-web.html ( diff )
/comms.html ( diff )
/document-lifecycle.html ( diff )
/document-sequences.html ( diff )
/dynamic-markup-insertion.html ( diff )
/imagebitmap-and-animations.html ( diff )
/index.html ( diff )
/indices.html ( diff )
/interaction.html ( diff )
/nav-history-apis.html ( diff )
/system-state.html ( diff )
/timers-and-user-prompts.html ( diff )
/webappapis.html ( diff )

[annevk]

WebKit will likely be opposed to this: WebKit/standards-positions#41 (comment). We don't think this is a good direction for the web and also believe that many of the main use cases driving this could be addressed by enhancements to the Media Session API.

I also think OP is a tad misleading as my understanding is that neither Chromium nor Gecko supports this API on mobile.

[zcorpan]

Thanks for reviewing and stating your position.

I've added "desktop only" to OP to clarify the current level of support.

For mobile, I'll note that Android has some precedent:

• Chrome Custom Tabs can be minimized which create a floating PiP window. Pressing it opens the content again.
• Google Maps opens a PiP window when navigating and then switching apps. Pressing it opens the app again.
• Zoom supports opening a PiP window, which has Zoom-specific controls in the PiP window.

and also believe that many of the main use cases driving this could be addressed by enhancements to the Media Session API.

I'd love to hear more about this.

For Document PiP, I suppose the API should be standardized outside of the HTML standard (but monkey patches can still go in HTML)?

[jan-ivar]

...many of the main use cases driving this could be addressed by enhancements to the Media Session API.

@annevk do you plan to open issues in https://github.com/w3c/mediasession to discuss these?