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conformance · v142

v142 · origin-keyed-process-isolation — 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/origin.html#origin-keyed-agent-clusters chromestatus: #5182464632946688 generated 2026-06-01T08:13:10Z by conformance-author-v1-subagent
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id contract kind verdict detail
secure-context Origin-keyed process isolation only meaningfully fires for HTTPS origins; the page must be in a secure context. script
origin-agent-cluster-readable window.originAgentCluster is a boolean reflecting whether the document is in an origin-keyed agent cluster — the introspection point for origin isolation. typeof
cross-origin-isolated-readable window.crossOriginIsolated is the related introspection bit for COOP/COEP isolation; it remains a boolean. typeof
document-origin-defined location.origin returns the page's origin string, the unit process isolation is keyed on. script
document-domain-still-defined-but-deprecated document.domain is still present as a writable IDL attribute; origin-keyed agent clusters disable its setter, but the property surface remains. script
origin-keyed-cluster-rejects-document-domain Assigning document.domain in an origin-keyed agent cluster either throws or leaves the origin unit unchanged. script