Multiplayer (Client/Server) game implementation in HTML5?

Does anyone have a reference/pointer for any multiplayer implementation of a game/app packaged as HTML5? Say, five HTML5 packaged clients (running in a browser) connect to a HTML5 packaged UE4 server? Or, these HTML5 clients connect to a UE4 server running on a PC?

The idea is to implement a small Javascript multiplayer game/chat app (~ 15 - 20 players) that can be played over networks.

Does anyone know an answer to this?

bumping this – there seems to be absolutely nothing on why HTML5 client/server functionality is missing, or how to set it up.

more info over here:

Did anyone find an answer to this?