https://developer.chrome.com/blog/broadcastchannel?authuser=7&hl=pt-br
API BroadcastChannel: um barramento de mensagens para a Web | Blog | Chrome for Developers
A API BroadcastChannel pode ser usada para pub/sub simples entre janelas, guias, iframes ou workers.
chrome for developersweb blogapibroadcastchannelum
https://developer.mozilla.org/en-US/docs/Web/API/StorageAccessHandle/BroadcastChannel
StorageAccessHandle: BroadcastChannel() method - Web APIs | MDN
An unpartitioned BroadcastChannel object.
web apisbroadcastchannelmethodmdn