Web features explorer - anchors-valid and anchors-visible

This feature is discouraged — The anchors-valid and anchors-visible values were renamed to the singular anchor-valid and anchor-visible values, since they refer to one anchor at a time.

For more information, see: css-anchor-position-1/#position-visibility:~:text=User%20agents%20may%20recognize%20anchors%2Dvalid%20and%20anchors%2Dvisible (CSSWG draft) , w3c/csswg-drafts/issues/10201#issuecomment-4390233490 (GitHub)

The position-visibility: anchors-valid and position-visibility: anchors-visible CSS declarations are aliases for anchor-valid and anchor-visible.

Browser support

Chrome Not supported
Chrome Android Not supported
Edge Not supported
Firefox 147 Released on 2026-01-13
Firefox for Android 147 Released on 2026-01-13
Safari 26.2 Released on 2025-12-12
Safari on iOS 26.2 Released on 2025-12-12

Baseline availability blocked since January 2026 by Chromium (7 months)

MDN documentation

No MDN documentation found.

Specifications

CSS Anchor Positioning Module Level 1 (#position-visibility), from Cascading Style Sheets (CSS) Working Group (W3C).

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