LGTM2
On 9/23/26 5:30 p.m., Chris Harrelson wrote:
LGTM1
On Wed, Sep 23, 2026, 2:12 PM Mason Freed <[email protected]> wrote:
*Contact emails*
[email protected]
*Explainer*
/No information provided/
*Specification*
https://drafts.csswg.org/css-anchor-position-1/#position-visibility
*Summary*
The CSSWG resolved to rename `anchors-valid` --> `anchor-valid`
[1] and `anchors-visible` --> `anchor-visible` [2]. To accomplish
this, we'll rename the properties to the singular variants, and
add aliases from the plural versions to the singular versions. At
a later date, we will remove the plural variants. This
chromestatus is only about shipping the new versions, and
deprecating the old ones (but not removing them).
[1]
https://github.com/w3c/csswg-drafts/issues/10201#issuecomment-4180411971[2]
https://github.com/w3c/csswg-drafts/issues/10201#issuecomment-4390233490
*Blink component*
Blink>CSS
<https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3ECSS%22>
*Web Feature ID*
anchor-positioning <https://webstatus.dev/features/anchor-positioning>
*Motivation*
CSSWG resolved to rename, and to maintain baseline status for
anchor positioning, Chrome needs to ship the new names.
*Initial public proposal*
/No information provided/
*Search tags*
position-visibility
<https://chromestatus.com/features#tags:position-visibility>,
anchor-visible
<https://chromestatus.com/features#tags:anchor-visible>,
anchor-valid <https://chromestatus.com/features#tags:anchor-valid>
*TAG review*
N/A
*TAG review status*
Not applicable
*Goals for experimentation*
None
*Risks*
*Interoperability and Compatibility*
Since this is the shipment of new names, and not the removal of
the old names, there should be no compat risk. Shipping the new
names improves interop.
/Gecko/: No signal
/WebKit/: Shipped/Shipping
/Web developers/: No signals
/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?
/No information provided/
*Debuggability*
/No information provided/
*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
*Flag name on about://flags*
/No information provided/
*Finch feature name*
PositionVisibilitySingularValues
*Rollout plan*
Will ship enabled for all users
*Requires code in //chrome?*
False
*Tracking bug*
https://issues.chromium.org/issues/526682332
*Estimated milestones*
Shipping on desktop 157
DevTrial on desktop 157
Shipping on Android 157
DevTrial on Android 157
Shipping on WebView 157
*Anticipated spec changes*
Open questions about a feature may be a source of future web
compat or interop issues. Please list open issues (e.g. links to
known github issues in the project for the feature specification)
whose resolution may introduce web compat/interop risk (e.g.,
changing to naming or structure of the API in a
non-backward-compatible way).
/No information provided/
*Link to entry on the Chrome Platform Status*
https://chromestatus.com/feature/5136123851571200?gate=6099968887750656
This intent message was generated by Chrome Platform Status
<https://chromestatus.com/>.
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