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Dataset 20261011-0550-f160c57 · measured 2026-10-11 05:50 UTC
By its definition this property acts on something a rendered page does not have — time, scrolling, the pointer, the output medium. We say so by hand, and say that it is said by hand: the search still tried its candidates, and had Chrome reacted to any of them the measurement would have won over this note.
declared · scrolling scroll-marker-group governs scrolling, and a rendered page has none. The search still tried 20 candidate values; Chrome’s largest reaction was 0 pixels, under the 40-pixel floor.
“Supported” on one example means “supported at the value we tried”. The property’s declared grammar has 5 branches; 0 of them carry a measurement. The publishing ceiling is 12 examples per property — a branch past it is left out by our choice, not by accident.
| Value | Measured |
|---|---|
| before | not measured |
| after | not measured |
| links | not measured |
| tabs | not measured |
| none | not measured |
Secondary evidence: 5 Web Platform Tests carry a spec anchor pointing at this property. Only 1,254 tests in the whole corpus carry such an anchor, so an empty list here means nothing at all.
Measured against Chrome 148.0.7778.96 on 2026-10-11, with up to 40 candidate values tried per property. All properties · How the measurement works