v151 · css · anchor-positioning
Computed Value Probe
Read the live computed position-anchor property from a positioned element. Toggle position-area on and off and watch normal resolve to auto or stay none accordingly.
probed element
position-anchor (computed)
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position-area (computed)
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CSS.supports(normal)
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how it works
In Chrome 151+, position-anchor's initial value is normal. When position-area is not none, normal computes to auto, which means the element uses the anchor named via anchor-name on a related element. When position-area is none, normal behaves like none — no anchoring.
references
implementation reference
Need the exact API surface, compatibility boundaries, errors, lifecycle, and source links? Read the matching gendn reference ↗