I am trying to write a Sub-Pub class that supports events AND sub-events denoted by the following syntax:

publisher.on("message:general", ... ) // subscribe to all messages
publisher.on("message", ... ) // subscribe to messages in general

To do this, I am using TypeScript template literals.

The issue is that while it broadly works, it seems to break generic constraints. Am I doing something wrong?

Here is what it looks like so far: