Function onError

packages/platform-browser/src/internal/worker.ts:25–30

(event: ErrorEvent)

      emit(event.data)
    }
    function onError(event: ErrorEvent) {
      Deferred.unsafeDone(
        deferred,
        new WorkerError({ reason: "unknown", cause: event.error ?? event.message })
      )
    }
    port.addEventListener("message", onMessage as any)
    port.addEventListener("error", onError as any)
    if ("start" in port) {