Ready for Developer Testing: Borderless mode

[Sonja Laurila]

Contact emails

lau...@chromium.org

Explainer

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

Specification

https://wicg.github.io/manifest-incubations/index.html#dfn-borderless

Design docs

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

Summary

When borderless mode is enabled for installed desktop web apps, the app's client area is extended to cover the entire window - including the title bar area and windowing control buttons (close, maximize/restore, minimize). The web app developer is responsible for drawing and input-handling for the entire window.

Blink component

UI>Browser>WebAppInstalls>Desktop

Search tags

borderless

TAG review

https://github.com/w3ctag/design-reviews/issues/852

TAG review status

Pending

Risks

Interoperability and Compatibility

The feature mostly re-uses the capabilities built with window-controls-overlay (e.g. draggable regions) but additionally it involves new web app manifest entry and changes to frame (hiding the host-native title bar).

Gecko: No signal

WebKit: No signal

Web developers: Strongly positive This feature is crucial for our VDI partners.

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

Ongoing technical constraints

Debuggability

N/A

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

No

Implemented on ChromeOS and Linux so far. MobileOS support is not planned.

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

No

DevTrial instructions

https://github.com/sonkkeli/borderless/tree/main/demo-app

Flag name

enable-desktop-pwas-borderless

Requires code in //chrome?

True

Tracking bug

https://crbug.com/1235285

Launch bug

https://launch.corp.google.com/launch/4211065

Estimated milestones

DevTrial on desktop

116

Link to entry on the Chrome Platform Status

https://chromestatus.com/feature/5551475195904000

Links to previous Intent discussions

Intent to prototype: https://groups.google.com/a/chromium.org/d/msgid/blink-dev/4ad86ea7-a144-4f95-b66f-7d457448143en%40chromium.org

This intent message was generated by Chrome Platform Status.

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Sonja Laurila (she/her) Software Engineer lau...@google.com, +49 1728 644080

Google Germany GmbH

Erika-Mann-Straße 33

80636 München

Geschäftsführer: Paul Manicle, Liana Sebastian

Registergericht und -nummer: Hamburg, HRB 86891

Sitz der Gesellschaft: Hamburg

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