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conformance · v130

v130 · css-container-queries-flat-tree-lookup — conformance probe

6 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-queries chromestatus: #5242724333387776 generated 2026-06-01T08:25:00Z by conformance-author-v1-subagent
0
pass
0
fail
0
blocked
6
total
id contract kind verdict detail
container-type-supported The container-type CSS property is supported. spec ↗ css-supports
container-name-supported The container-name CSS property is supported. spec ↗ css-supports
container-shorthand-supported The container shorthand (name / type) is supported. spec ↗ css-supports
css-container-rule The CSSContainerRule interface is exposed, used by @container queries that resolve against flat-tree ancestors. spec ↗ exists
slotted-flat-tree-cq-applies An unnamed inline-size container inside shadow DOM is queryable from slotted light-DOM descendants (the flat-tree change). spec ↗ script
container-queries-conditional-supported @container conditional rules parse via CSSOM (sheet.cssRules contains the rule). spec ↗ script