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conformance · v148

v148 · extended-lifetime-shared-workers — conformance probe

5 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/workers.html#shared-workers-and-the-sharedworker-interface chromestatus: #5138641357373440 generated 2026-06-01T08:14:38Z by conformance-author-v1-subagent
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id contract kind verdict detail
sharedworker-exists SharedWorker is exposed on the global object. exists
sharedworker-is-constructor SharedWorker is a constructor. typeof
extended-lifetime-option-accepted The SharedWorker constructor accepts the {extendedLifetime: true} option without throwing for syntax reasons. spec ↗ script
sharedworker-options-name The existing name option still works (option bag shape preserved). spec ↗ script
messageport-exists MessagePort is exposed; it's the channel SharedWorker.port returns. exists