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conformance · v149

v149 · comma-separated-container-queries — 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://drafts.csswg.org/css-conditional-5/#container-rule chromestatus: #6196591858941952 generated 2026-06-01T08:03:56Z by conformance-author-v1-subagent
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pass
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fail
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blocked
5
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id contract kind verdict detail
comma-list-parses-via-supports CSS parser accepts a comma-separated list of container conditions inside @container via CSS.supports. spec ↗ script
container-rule-disjunction-parses An @container rule with a comma-separated list of queries parses into a CSSContainerRule and round-trips through cssText. spec ↗ script
container-rule-cssom-exists CSSContainerRule is exposed on the window so script can introspect @container rules. spec ↗ exists
container-rule-conditiontext-roundtrip The conditionText of a comma-separated @container rule preserves the disjunction. spec ↗ script
fallback-with-unknown-feature A comma list where one branch references an unknown feature still parses because at-least-one-matches semantics tolerate unknown branches. spec ↗ script