← back to v139 · request-close-invoker-command

conformance · v139

v139 · request-close-invoker-command — conformance probe

7 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/form-elements.html#attr-button-command-request-close-state chromestatus: #5592399713402880 generated 2026-06-01T08:13:31Z by conformance-author-v1-subagent
0
pass
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fail
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blocked
7
total
id contract kind verdict detail
html-button-element-command-reflected HTMLButtonElement reflects the command content attribute as element.command. spec ↗ script
html-button-element-commandfor-reflected HTMLButtonElement reflects commandfor as element.commandForElement (Element-typed reflector). script
command-event-constructor The CommandEvent interface is exposed. spec ↗ typeof
request-close-command-keyword-accepted Setting button.command='request-close' is reflected back (the keyword the v139 feature introduces). spec ↗ script
show-modal-on-dialog HTMLDialogElement.prototype.showModal exists — request-close targets dialog elements. typeof
request-close-method-on-dialog HTMLDialogElement.prototype.requestClose exists — the imperative counterpart of the request-close command keyword. spec ↗ script
cancel-event-on-dialog Dialog still dispatches a 'cancel' event so authors can prevent close — request-close routes through this same event for cancellable behaviour. script