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conformance · v140

v140 · toggleevent-source-attribute — 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-toggleevent-interface chromestatus: #5165304401100800 generated 2026-06-01T23:38:10Z by manual
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id contract kind verdict detail
toggleevent-source-on-prototype ToggleEvent exposes a read-only source attribute on its prototype. spec ↗ script
toggleevent-constructor-source-defaults-null ToggleEventInit.source defaults to null when no source element is supplied. spec ↗ script
beforetoggle-source-from-popovertarget Opening a popover from a popovertarget button fires beforetoggle with source set to that button. spec ↗ script
toggle-source-from-popovertarget Opening a popover from a popovertarget button queues a toggle event whose source is the invoking button. spec ↗ script
programmatic-show-source-null Programmatic showPopover() fires beforetoggle and toggle with source set to null when no source option is supplied. spec ↗ script
hide-toggle-source-from-popovertarget Hiding an open popover via the same popovertarget button reports that button as the source on beforetoggle and toggle. spec ↗ script