You can use broadcastchannel to coordinate multiple tabs and workers. And I think once you receive a message from such a channel you get a proxy for the sender,

You can use broadcastchannel to coordinate multiple tabs and workers. And I think once you receive a message from such a channel you get a proxy for the sender, which means you can establish a 1-1 channel, which in turn means you can can transfer objects like sharedarraybuffer.