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conformance · v131

v131 · nested-pseudo-elements-styling — conformance probe

5 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/#marker-pseudo chromestatus: #5199947786616832 generated 2026-06-02T09:02:11Z by codex-auto-research-v131
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id contract kind verdict detail
before-marker-selector-supported ::before::marker parses as a nested pseudo-element selector. spec ↗ css-supports
after-marker-selector-supported ::after::marker parses as a nested pseudo-element selector. spec ↗ css-supports
before-marker-stylesheet-roundtrip A li::before::marker rule round-trips through CSSStyleSheet. spec ↗ script
after-marker-stylesheet-roundtrip A li::after::marker rule round-trips through CSSStyleSheet. spec ↗ script
content-property-supported The content property is supported for generating before/after boxes that can own markers. spec ↗ css-supports