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conformance · v147

v147 · csspseudoelement-support-for-backdrop-scroll-marker-and-view-transitions — 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://drafts.csswg.org/css-pseudo-4/#CSSPseudoElement-interface chromestatus: #6516055192240128 generated 2026-06-01T08:14:09Z by conformance-author-v1-subagent
0
pass
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fail
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blocked
6
total
id contract kind verdict detail
csspseudoelement-backdrop Element.pseudo('::backdrop') returns a CSSPseudoElement instance. spec ↗ script
csspseudoelement-scroll-marker Element.pseudo('::scroll-marker') returns a CSSPseudoElement instance or null. spec ↗ script
csspseudoelement-view-transition Element.pseudo('::view-transition') returns a CSSPseudoElement instance or null. spec ↗ script
csspseudoelement-getboundingclientrect CSSPseudoElement exposes getBoundingClientRect() — the spec extension this work adds for geometry queries. spec ↗ script
csspseudoelement-addEventListener CSSPseudoElement is an EventTarget so addEventListener is exposed on its prototype. spec ↗ script
backdrop-click-handler Listening for click on a ::backdrop pseudo via the JS interface does not throw. spec ↗ script