Contact emails

[email protected], [email protected]

Explainer

https://github.com/w3c/mediasession/issues/274

Specification

https://w3c.github.io/mediasession/#dom-mediasessionaction-previousslide

https://w3c.github.io/mediasession/#dom-mediasessionaction-nextslide

API spec

Yes

Summary

Adds "previousslide" and "nextslide" actions to the existing Media Session
API.

Blink component

Blink>Media>Session

Motivation

This will enable developers of video conferencing websites to handle these
actions from browser UI. For example, if the user puts their slides
presentation into a picture-in-picture window, the browser could display
buttons for navigating through slides. When the user clicks those, the
website handles them through the Media Session API.

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: Positive (
https://github.com/w3c/mediasession/pull/284#pullrequestreview-1106405304)

WebKit: Positive (
https://github.com/w3c/mediasession/pull/284#issuecomment-1217526791)

Web / Framework developers: Positive - The existence of the popular (100K+
users) Remote for Slides extension (
https://chrome.google.com/webstore/detail/remote-for-slides/pojijacppbhikhkmegdoechbfiiibppi)
proves that there is strong user demand for a (remote) slide control
feature, up to the point that they would install an extension just for that.


Ergonomics:

N/A

Activation:

Web developers will be able to simply set/unset a media session action
handler for “Previous Slide” and “Next Slide” to control the visibility of
the button in the Picture-in-Picture window. 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/1363548

Estimated milestones

DevTrial on desktop 110

DevTrial on Android 110

Link to entry on the Chrome Platform Status

https://chromestatus.com/feature/5090980649238528

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