1. BroadcastChannel

    BroadcastChannel allows scripts from the same origin but other browsing contexts (windows, workers) to send each other messages.

  2. broadcastchannel api: `broadcastchannel()` constructor

  3. broadcastchannel api: close

  4. broadcastchannel api: `messageerror` event

  5. broadcastchannel api: `message` event

  6. broadcastchannel api: name

  7. broadcastchannel api: postmessage

  8. document api: requeststorageaccess: `types` parameter: `types.broadcastchannel` parameter

  9. storageaccesshandle api: broadcastchannel