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conformance · v146

v146 · scoped-custom-element-registry — 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/custom-elements.html#customelementregistry chromestatus: #5090435261792256 generated 2026-06-01T08:00:00Z by conformance-author-v1-subagent
0
pass
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fail
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blocked
6
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id contract kind verdict detail
customelementregistry-constructible CustomElementRegistry now has a public constructor — `new CustomElementRegistry()` succeeds. script
scoped-registry-define-method An instance of CustomElementRegistry exposes define() with the standard signature. script
attachshadow-accepts-customelements-option Element.attachShadow accepts a customElements option pointing at a scoped registry. script
shadowroot-exposes-customelements-getter ShadowRoot exposes a customElements getter so script can introspect which registry is in effect. script
createelement-takes-registry-option Document.createElement accepts a customElementRegistry option so factory functions can use scoped registrations. script
global-customelements-still-present The legacy global window.customElements registry remains for backwards compatibility. script