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conformance · v141

v141 · update-hidden-until-found-and-details-ancestor-revealing-algorithm — 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/interaction.html#the-hidden-attribute chromestatus: #5179013869993984 generated 2026-06-01T08:13:08Z by conformance-author-v1-subagent
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id contract kind verdict detail
hidden-attribute-reflects HTMLElement.hidden reflects the hidden content attribute; 'until-found' is a value the revealing algorithm operates on. script
details-element-exists HTMLDetailsElement is exposed; its open attribute is toggled by the revealing algorithm when content inside is targeted. exists
details-open-reflects HTMLDetailsElement.open reflects the open attribute; the revealing algorithm sets this on ancestors. script
beforematch-event-supported The 'beforematch' event is fired on elements when hidden=until-found content is about to be revealed by find-in-page. script
element-scrollintoview Element.prototype.scrollIntoView exists; the revealing algorithm uses scroll-into-view as part of bringing content into the viewport. typeof
scrollintoviewifneeded-no-infinite-loop Calling scrollIntoView on a deeply nested hidden=until-found target returns synchronously without entering an infinite loop (the spec change's stated motivation). script