uot;) {
            resolve(event.data);
          }
        };
        bc.postMessage(&quot;request&quot;);
        setTimeout(() =&gt; reject({message: &quot;no BroadcastChannel message&quot;}), 3000);
      })

result, same first party: c13586d0-895d-4d95-a5b1-836ae9757ca3

result, different first party: c13586d0-895d-4d95-a5b1-836ae9757ca3

unsupported: false

passed: false

test failed: false</span>
</div></td></tr><tr><td><div class="tooltipParent">CacheStorage<span class="tooltipText">The Cache API i