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conformance · v144

v144 · non-tree-scoped-container-name-matching — conformance probe

4 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-name chromestatus: #5194034339512320 generated 2026-06-01T08:03:56Z by conformance-author-v1-subagent
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id contract kind verdict detail
container-name-supported The container-name CSS property is supported. spec ↗ css-supports
container-type-supported container-type is supported as the companion property. spec ↗ css-supports
container-shorthand-supported container shorthand combines name and type. spec ↗ css-supports
cross-tree-container-match A container-name declared in one stylesheet's tree scope matches an @container query authored in a different scope (shadow vs. light). Container queries no longer require same-tree-scope name resolution. spec ↗ script