Stop action for Media Session

Category: Multimedia
Type: New or changed feature
Status: Enabled by default (Chrome 77)
Intent stage: Evaluate readiness to ship

Breaking change: No
Enterprise impact: None
Spec maturity: Working draft
Web Platform Tests: Yes

WPT details: There is a WPT test in this CL: https://chromium-review.googlesource.com/c/chromium/src/+/1635354

Summary

Adds support for the "stop" action to the MediaSession interface. An action is an event tied specifically to a common media function such as pause or play. The "stop" action handler is called when the site should stop the playback and clear the state if appropriate.

Motivation

We should add support for "stop" since this action is supported by the platform and allows sites to provide a better experience.

Standards & signals

Specification: https://wicg.github.io/mediasession/#dom-mediasessionaction-stop
Firefox: Positive
Safari: Positive
Web developers: No signals
Tracking bug: https://bugs.chromium.org/p/chromium/issues/detail?id=940054

Ecosystem

Web Platform Tests: https://wpt.fyi/results/?q=stop-action-for-media-session
Chrome Platform Showcase: https://chrome-platform-showcase.paulkinlan-ea.deno.net/features
GenDN reference: https://gendn.paulkinlan-ea.deno.net/features
chrome.dev demos search: https://www.google.com/search?q=site%3Achrome.dev+Stop%20action%20for%20Media%20Session
MDN Web Docs: https://developer.mozilla.org/en-US/search?q=Stop%20action%20for%20Media%20Session
Baseline status: https://webstatus.dev/?q=Stop%20action%20for%20Media%20Session

Docs: https://wicg.github.io/mediasession/#dom-mediasessionaction-stop

Samples: https://googlechrome.github.io/samples/media-session/video.html https://googlechrome.github.io/samples/media-session/audio.html

Explainers: https://github.com/WICG/mediasession/blob/master/explainer.md

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