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conformance · v131

v131 · improvements-to-styling-structure-of-details-and-summary-elements — 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://html.spec.whatwg.org/multipage/rendering.html#the-details-and-summary-elements chromestatus: #5112013093339136 generated 2026-06-02T09:02:11Z by codex-auto-research-v131
0
pass
0
fail
0
blocked
6
total
id contract kind verdict detail
details-element-exposed HTMLDetailsElement is exposed. spec ↗ exists
summary-element-constructs The summary element constructs as an HTMLElement. spec ↗ script
details-content-selector-supported The ::details-content pseudo-element selector is supported. spec ↗ css-supports
details-content-stylesheet-parses A stylesheet rule targeting details::details-content is retained in CSSOM. spec ↗ script
details-display-can-be-grid The details element no longer rejects author display styling such as grid. spec ↗ script
summary-display-can-be-flex The summary element can be styled with display: flex. spec ↗ script