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conformance · v132

v132 · dialog-toggle-events — 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/interactive-elements.html#the-dialog-element chromestatus: #5078613609938944 generated 2026-06-01T08:17:30Z by conformance-author-v1-subagent
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id contract kind verdict detail
toggle-event-constructor-exists ToggleEvent constructor is exposed globally; it's the same event interface popover already uses, now also fired by dialog. spec ↗ exists
toggle-event-has-new-state ToggleEvent instances expose newState and oldState string properties. spec ↗ script
dialog-fires-toggle-on-show HTMLDialogElement fires a toggle event when shown. spec ↗ script
dialog-fires-beforetoggle HTMLDialogElement supports beforetoggle as a cancellable precursor event. spec ↗ script
dialog-ontoggle-property HTMLDialogElement exposes an ontoggle IDL attribute for event handler registration. spec ↗ script
dialog-onbeforetoggle-property HTMLDialogElement exposes an onbeforetoggle IDL attribute for event handler registration. spec ↗ script