How to use Ports + Relay to send messages from BGSW to Webpage (CS that world:main)

[sainthardrock]

I read in docs Ports + Relay can use for this purpose but i didn't see anything about how you can achieve this ? Is there anyone tried it ?

[flexchar]

I'm also wondering if relay is bidirectional. I got it working from MAIN to BGJS (with relay) but not the other way around.

[robertsamarji]

Has anyone figured this out?

I can send a message from the background.ts to a CSUI using ports but I cannot seem to send a message from a background/messages/message-handler.ts to a CS using ports. I get a port connection error.