Chrome 144 + Firefox 147 support CSS position-anchor: none
#28648
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caugner
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position-anchor: none
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Implemented in chromium/chromium@351afdf (edit) Shipped in Chrome 144 apparently: chromium/chromium@f95ef29 See also: https://chromiumdash.appspot.com/commit/f95ef29e591dd8be22f22adda44a3cb179216cba |
caugner
requested changes
Dec 12, 2025
caugner
changed the title
position-anchor: noneposition-anchor: none
Co-authored-by: Claas Augner <495429+caugner@users.noreply.github.com>
caugner
approved these changes
Dec 12, 2025
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Summary
Firefox 147 adds support for the new
nonevalue of theposition-anchorCSS property. See https://bugzilla.mozilla.org/show_bug.cgi?id=1999972.This PR adds a data point for the new value.
I've also tested it in Chrome Canary and found that it works there too. It must have been added to Chromium very recently (I can't find a PR reference or chromestatus entry), so I've put the support as "preview" for now.
AFAICT, the new value hasn't been added to the spec yet, so I've set the feature to
"standard_track": falsefor now.Test results and supporting details
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