Custom Event emitter/consumers in Browser Javascript outside DOM


Custom Event emitter/consumers in Browser Javascript outside DOM



Currently I have the following structure, an Object WebsocketService and multiple FrontendControllers.


WebsocketService


FrontendController



The WebsocketService listens on a websocket (duh) and updates the internal application state. This means in some cases the front end must be updated with new values.


WebsocketService



To keep my UI code and the application logic nicely seperated I envision a design where the FrontendControllers can subscribe to events emitted the WebsocketService and very likely other Services later on.


FrontendController


WebsocketService



I have read the documentation for Creating and triggering events on MDN. But all of that is very DOM centric. My WebsocketService obviously doesn't have an addEventListener function.


WebsocketService


addEventListener



I would prefer to not use 3th-party libraries. A hack that comes to mind is simply have an id="events" DOM Node somewhere and having everyone subscribe to that. Then dispatchEvents on that Element and have the FrontendControllers decide that they care about.


id="events"


dispatchEvent


FrontendController



Of course I could also implement my own infrastructure for all this, but I'd also prefer to avoid that, because I'm lazy.



What is the clean way to do this? Or is there a much better solution to decouple my application logic and frontend in plain old javascript?



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