Contact emailsloubr...@google.com, glen...@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 componentBlink>AppManifest
<https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EAppManifest>

TAG reviewhttps://github.com/w3ctag/design-reviews/issues/696

TAG review statusPending

Risks


Interoperability and Compatibility



*Gecko*: No signal (
https://github.com/mozilla/standards-positions/issues/630)

*WebKit*: No signal (
https://lists.webkit.org/pipermail/webkit-dev/2022-April/032187.html)

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

*Other signals*:

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?



Goals for experimentation

Allow web developers to use this field and provide feedback.


Reason this experiment is being extended

Requesting a one milestone extension to 108 (inclusive). The manifest
format is going to change again based on
https://github.com/w3c/manifest/issues/1045. We will do a new OT for the
new format but would like the one milestone extension in order to get the
new OT ready to start in 109.


Ongoing technical constraints



Debuggability

chrome://web-app-internals can be used for debugging, and this has been
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)?No

Not supported on Android


Is this feature fully tested by web-platform-tests
<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
?Yes

Flag namechrome://flags/#enable-experimental-web-platform-features

Requires code in //chrome?True

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

Launch bughttps://bugs.chromium.org/p/chromium/issues/detail?id=1279284

Estimated milestones
OriginTrial desktop last 107
OriginTrial desktop first

99
Requesting a one milestone extension to 108 (inclusive)

Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5714780426862592

Links to previous Intent discussionsIntent to prototype:
https://groups.google.com/a/chromium.org/g/blink-dev/c/Y6zNtG0f-6A
Intent to Experiment:
https://groups.google.com/a/chromium.org/g/blink-dev/c/ftoKq32Baz4
Intent to Extend Experiment:
https://groups.google.com/a/chromium.org/g/blink-dev/c/2c8msRrrcF0


This intent message was generated by Chrome Platform Status
<https://chromestatus.com/>.

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