On 2/28/25 12:31 PM, 'Frank Liberato' via blink-dev wrote:
Contact Email
liber...@google.com <mailto:liber...@google.com>
twelling...@google.com <mailto:twelling...@google.com>
Specification
ScreenOrientation::lock()
<https://www.w3.org/TR/screen-orientation/#lock-method>
Chrome Status Entry
https://chromestatus.com/feature/5144443101118464
<https://chromestatus.com/feature/5144443101118464>
Summary
Android tablets can and sometimes do lie about handling an
application’s request to lock orientation. For example, in response
to an application request to lock the orientation to landscape while
in portrait mode, the tablet might report success after (a) doing
nothing, (b) letterboxing while remaining in portrait, or (c)
correctly rotating the display. This makes the behavior of the
ScreenOrientation::lock() API on tablets hard for sites to rely on; a
successfully resolved Promise doesn’t always mean what the spec says
it means.
Further, these behaviors are becoming more common among tablets. We
expect this trend to continue.
To address this, we plan to make ScreenOrientation::lock() for all
non-phone form-factors reject the resulting Promise with a
`NotSupportedError` without attempting to lock orientation.
What are the spec implementations of this change? Have you brought this
up to other implementers that also ship on Tablets?
Foldables will behave according to Chrome’s belief about the current
device shape, though Chrome’s detection of this continues to be
somewhat flaky
<https://source.chromium.org/chromium/chromium/src/+/main:ui/android/java/src/org/chromium/ui/base/DeviceFormFactor.java;drc=d7cd8fa1f66656974d5878f7cb0973d651b7a416;l=79>.
Other form-factors, e.g. “automotive”, don’t really make sense with
this API anyway.
Blink Components
Blink>ScreenOrientation
Tracking Bug
https://launch.corp.google.com/launch/4383592
<https://launch.corp.google.com/launch/4383592>
https://b.corp.google.com/issues/384736274
<https://b.corp.google.com/issues/384736274>
Estimated MilestoneM136 --
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