Ok. I can't seem to be able to regenerate the draft... But, I have addressed your feedback and updated the chrome status feature page where necesary. Thanks for the tip about the webtests. I will try to do it soon. Thanks for the feedback!
*TAG review request*: https://github.com/w3ctag/design-reviews/issues/1084 *Goals for experimentation*: Gather feedback from web developers and validate that the current prototype implementation works as expected. We have added telemetry to measure how the feature is being exercised by users: - HTMLMediaElement's: - # of pauses while hidden - # of pauses because got hidden during playback - WebAudio AudioContext's - # of interruptions while hidden - # of interruptions because got hidden during playback *Experiment milestones*: M137 On Tuesday, April 22, 2025 at 2:28:47 AM UTC-7 Domenic Denicola wrote: Generally looks good, but there's a few things to tidy up... On Tuesday, April 22, 2025 at 5:59:10 AM UTC+9 Chromestatus wrote: Contact emails gabrie...@microsoft.com, ste...@microsoft.com Explainer https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/ IframeMediaPause/iframe_media_pausing.md Specification None Summary Adds a "media-playback-while-not-rendered" permission policy to allow embedder websites to pause media playback of embedded iframes which aren't rendered - i.e. have their "display" property set to "none". This should allow developers to build more user-friendly experiences and to also improve the performance by letting the browser handle the playback of content that is not visible to users. Blink component Blink>Media <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3EMedia%22> TAG review None It might be worth filing this now to get feedback early. (Not a blocker for approving the I2E.) TAG review status Pending Origin Trial documentation link https://github.com/MicrosoftEdge/ MSEdgeExplainers/blob/main/IframeMediaPause/iframe_media_pausing.md Risks Interoperability and Compatibility This feature is still being discussed with other browser vendors and the shape and functionality might not be final. *Gecko*: No signal (https://github.com/mozilla/standards-positions/issues/ 1082) *WebKit*: No signal (https://github.com/WebKit/ standards-positions/issues/409) *Web developers*: Positive (https://github.com/whatwg/html/issues/10208) The web community seems to be interested in this feature, even though we may need to iterate on the user-facing API. *Other signals*: Ergonomics This feature will be used with other audio rendering API's, like HTMLMediaElement and Web Audio. This new behavior should only take effect if web pages explicitly opt-in by overriding the permission policy's default state. Moreover, once the permission policy is used, it should help Chromium to be more optimized by pausing audio rendering for content that is not visible for the user. Activation Developers need to opt-in by setting "allow" property of an iframe. For example: <iframe src="https://foo.media.com"; allow="media-playback-while-not-visible 'none'"></iframe> WebView application risks Does this intent deprecate or change behavior of existing APIs, such that it has potentially high risk for Android WebView-based applications? None Goals for experimentation Due to https://github.com/GoogleChrome/chromium-dashboard/issues/4155 (please upvote), this field gets lost when generating emails in Chrome Status. Could you copy it over for us? Ongoing technical constraints None Debuggability None Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, ChromeOS, Android, and Android WebView)? Yes Is this feature fully tested by web-platform-tests <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md> ? Yes We have implemented Blink webtests. But they are not WPT's yet. - https://source.chromium.org/chromium/chromium/src/+/main: third_party/blink/web_tests/media/media-playback-while- not-visible-permission-policy-cant-play-if-hidden.html?q= third_party%2Fblink%2Fweb_tests%2Fmedia%2Fmedia-playback-while-not-visible- permission-policy-cant-play-if-hidden.html&ss=chromium%2Fchromium%2Fsrc - https://source.chromium.org/chromium/chromium/src/+/main: third_party/blink/web_tests/media/media-playback-while- not-visible-permission-policy-pause-when-hidden.html You can move these into web platform tests as long as you use the .tentative naming scheme <https://web-platform-tests.org/writing-tests/file-names.html>. (Not blocking for the I2E.) DevTrial instructions https://github.com/MicrosoftEdge/ MSEdgeExplainers/blob/main/IframeMediaPause/iframe_media_ pausing.md#proposed-solution-media-playback-while-not- visible-permission-policy Flag name on about://flags None Finch feature name MediaPlaybackWhileNotVisiblePermissionPolicy,AudioContextInterruptedState Requires code in //chrome? False Tracking bug https://issues.chromium.org/issues/351354996 Estimated milestones DevTrial on desktop 133 This one is pretty important: can you fill in the experiment milestones? Link to entry on the Chrome Platform Status https://chromestatus.com/ feature/5082950457884672?gate=5165819033288704 Links to previous Intent discussions Intent to Prototype: https://groups.google.com/a/chromium.org/d/msgid/blink-dev/ PH7PR00MB1638C5FA59458CE0BBDC1FA6D5D72%40PH7PR00MB1638. namprd00.prod.outlook.com This intent message was generated by Chrome Platform Status <https://chromestatus.com>. -- You received this message because you are subscribed to the Google Groups "blink-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to blink-dev+unsubscr...@chromium.org. To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/f29cc6a5-83b7-4bde-a450-302cb689e88an%40chromium.org.
