StorageAccessHandle: Свойство BroadcastChannel()

handle.BroadcastChannel(channelName)

document.requestStorageAccess({ BroadcastChannel: true }).then(
  (handle) => {
    console.log("BroadcastChannel access granted");
    handle.BroadcastChannel(channel_name);
  },
  () => {
    console.log("BroadcastChannel access denied");
  },
);