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conformance · v149

v149 · user-action-pseudo-class-top-layer-boundary — conformance probe

7 assertions drawn from the spec. Each is a single contract the spec text makes. Pass/fail reflects what this browser executed; blocked means the contract was not run because it needs user mediation, hardware, or another unavailable precondition. Open the page in Chrome stable / canary / Firefox / Safari to compare.

browser: spec: https://www.w3.org/TR/selectors-4/#useraction-pseudos chromestatus: #6296574159355904 generated 2026-06-01T08:15:14Z by conformance-author-v1-subagent
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id contract kind verdict detail
hover-pseudo-class-supported :hover is supported in selectors (the user-action pseudo whose ancestor walk now stops at the top layer). spec ↗ script
active-pseudo-class-supported :active is supported. spec ↗ script
focus-within-pseudo-class-supported :focus-within is supported (the bubble-up pseudo with the new boundary). spec ↗ script
dialog-show-modal-puts-in-top-layer <dialog>.showModal places the element in the top layer (the boundary the spec stops :hover at). spec ↗ script
popover-attribute-puts-in-top-layer Elements with popover attribute also reach the top layer — equivalent boundary for :hover. spec ↗ script
modal-pseudo-class-supported :modal pseudo-class is supported (used to identify the top-layer boundary in selectors). spec ↗ script
focus-within-stops-at-modal-top-layer Focus inside a modal top-layer dialog does not make an ancestor outside the top layer match :focus-within. spec ↗ script