-write?secret=${key}`);
    }

read: async () => {
      let registration = await navigator.serviceWorker.register(
        &#39;serviceWorker.js&#39;);
      console.log(registration);
      await navigator.serviceWorker.ready;
      console.log("service worker ready");
      await sleepMs(100);
      let response = await fetch("serviceworker-read");
      return await response.text();
    }

result, same first party: d2abde09-06d3-4ba7-a54b-91c3416b35ca

result, different first party: 

unsupported: false