On Friday, October 6, 2023 at 12:55:09 AM UTC+2 chri...@google.com wrote:

Hi,

Please update your chromestatus entry to trigger the other 5 review 
categories for this intent. I think it's probably the case that you ended 
up with the wrong feature category and need to update it, sorry for any 
confusion. @Jason Robbins <jrobb...@google.com> also.

On Wed, Oct 4, 2023 at 3:35 PM 'Tommy Steimel' via blink-dev <
blink-dev@chromium.org> wrote:

Contact emails

stei...@chromium.org, liber...@chromium.org

Explainer

https://github.com/w3c/mediasession/issues/294


Can you explain what this action does and how developers are likely to use 
it?
 


Specification

https://github.com/w3c/mediasession/pull/295


What's blocking the PR from landing?
 


API spec

Yes

Summary

Adds an 'enterpictureinpicture' action to the Media Session API. Websites 
can register an action handler which can be used to open a 
Picture-in-Picture or Document Picture-in-Picture window.

Blink component

Blink>Media>Session

TAG review

This small addition to the Media Session API doesn’t seem to qualify for a 
TAG review. 

Note that one for video conferencing actions was approved previously at 
https://github.com/w3ctag/design-reviews/issues/608

TAG review status

N/A

Debuggability

No DevTools changes are required, treated like any other attribute/enum.

Risks


Interoperability and Compatibility
It’s low risk as it's a small addition to an existing API that both Gecko 
and WebKit approve of.


Signals from other implementations (Gecko, WebKit): 

Gecko: No signal

WebKit: No signal - Generally positive feedback when discussed in the Media 
WG, but no official position pursued due to the small nature of the change

Web / Framework developers: Positive 

(https://github.com/WICG/document-picture-in-picture/issues/96)

The above citation is one example amongst many where developers want to be 
able to initiate pip through other means (e.g. automatically when switching 
tabs or when a picture-in-picture button is pressed in browser UI), and 
having a media session action for this enables the UA to allow the website 
to open a picture-in-picture window in these cases


Ergonomics:

N/A: small addition to an enum of an existing API

Activation:

Web developers will be able to simply set/unset a media session action 
handler for “enterpictureinpicture” to make use of this change. When the 
action name is not supported, it raises a TypeError which can be caught to 
detect feature support.

Is this feature fully tested by web-platform-tests?

https://wpt.fyi/results/mediasession/setactionhandler.html 

Tracking bug

https://crbug.com/1457056

Estimated milestones

Shipping on desktop 120

Link to entry on the Chrome Platform Status

https://chromestatus.com/feature/6245717716238336

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