Intent to Experiment: Dark mode support for web apps

[Louise Brett]

Contact emails

loub...@google.com, gle...@chromium.org, mgi...@chromium.org

Explainer

https://github.com/WICG/manifest-incubations/blob/gh-pages/user-preferences-explainer.md

Specification

Summary

Add a field to the web app manifest which allows apps to specify a different theme color and background color for dark mode.

Blink component

Blink>AppManifest

TAG review

https://github.com/w3ctag/design-reviews/issues/696

TAG review status

Pending

Risks

Interoperability and Compatibility

Gecko: No signal

WebKit: No signal

Web developers: Positive (https://github.com/w3c/manifest/issues/975)

Other signals:

Goals for experimentation

Allow web developers to use this field and provide feedback.

Ongoing technical constraints

Debuggability

chrome://web-app-internals can be used for debugging, and this could also be added to the DevTools Application pane.

Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, Chrome OS, Android, and Android WebView)?

Yes

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

No. This is tested by unit tests and browser tests.

Flag name

chrome://flags/#enable-experimental-web-platform-features

Requires code in //chrome?

True

Tracking bug

https://bugs.chromium.org/p/chromium/issues/detail?id=1271804

Estimated milestones

OriginTrial desktop last	102
OriginTrial desktop first	99

Link to entry on the Chrome Platform Status

https://chromestatus.com/feature/5714780426862592

Links to previous Intent discussions

Intent to prototype: https://groups.google.com/a/chromium.org/g/blink-dev/c/Y6zNtG0f-6A

This intent message was generated by Chrome Platform Status.

[Mike West]

LGTM to experiment from 99-102.

-mike

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