Close or Terminate events on Comlink SharedWorker proxy for cleanup on Page or SharedWorker side

When a page is closed or SharedWorker Terminated, there should be a way to notify SharedWorker for any required cleanup(in my case websocket STOMP subscriptions)
When shared worker is terminated, there should be a way to reload shared worker, at least some guidance in documentation will be very helpful.
I used heartbeat polling to achieve same(https://github.com/sivayapps/ws-lib), but it would be very helpful if documentation suggests any standard way of doing it with Comlink.