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conformance · v147

v147 · csspseudoelement-interface — 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/css-pseudo-4/#CSSPseudoElement-interface chromestatus: #5194399398756352 generated 2026-06-01T08:14:09Z by conformance-author-v1-subagent
0
pass
0
fail
0
blocked
7
total
id contract kind verdict detail
csspseudoelement-global CSSPseudoElement is exposed on the global scope. spec ↗ script
element-pseudo-method Element.prototype.pseudo() is exposed and returns a CSSPseudoElement (or null). spec ↗ script
pseudo-before-returns-instance element.pseudo('::before') returns a CSSPseudoElement instance. spec ↗ script
csspseudoelement-type-attr A returned CSSPseudoElement exposes a type attribute reflecting the pseudo-element kind. spec ↗ script
csspseudoelement-element-attr CSSPseudoElement.element points back at the originating element. spec ↗ script
csspseudoelement-nested-pseudo CSSPseudoElement.prototype.pseudo() exists for retrieving nested pseudo-elements. spec ↗ script
csspseudoelement-parent-attr CSSPseudoElement exposes a parent attribute on its prototype. spec ↗ script