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conformance · v135

v135 · observable-api — 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://wicg.github.io/observable/ chromestatus: #5154593776599040 generated 2026-06-01T09:42:00Z by conformance-author-v1-subagent
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pass
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id contract kind verdict detail
observable-constructor-exists Observable is exposed as a constructor on the global. spec ↗ typeof
subscriber-interface-exposed Subscriber interface is exposed — the object passed to the producer callback. spec ↗ exists
event-target-when-method EventTarget.prototype.when is exposed — the ergonomic event→Observable bridge. spec ↗ script
subscribe-method-on-observable Observable.prototype.subscribe is exposed. spec ↗ script
observable-emits-next-value-sync Constructing an Observable that synchronously calls subscriber.next delivers the value to the observer. spec ↗ script
observable-map-operator Observable.prototype.map is exposed — a representative operator from the standard library. spec ↗ script