.arthuredelstein.net:4434/connection_id`, {cache: &quot;no-store&quot;});
        await sleepMs(500);
      }
      // Are we now connecting over h3?
      let response = await fetch(`https://h3.arthuredelstein.net:4434/connection_id`, {cache: &quot;no-store&quot;});
      let text = await response.text();
      // Empty response text indicates we are not connecting over h3:
      if (text.trim() === &quot;&quot;) {
        throw new Error(&quot;Unsupported&quot;);
      }
    }

read: async () =&gt; {
    