danneu / elm-mmo

the client + server of a MUD-like multiplayer game over websockets

elm-mmo

A proof-of-concept implementation of a MUD-like multiplayer game over WebSockets built with Elm.

• Client talks to a native browser WebSocket over ports.
• Server talks to a Node.js websocket implementation (ws) over ports.
• Client and server share Elm types.

The game is basically a map of connected rooms. Players can move North/South/East/West between rooms. When players enter/leave rooms or connect/disconnect, this info is broadcast to other players in a room.

Demo

Open three terminal panes at project root.

Build and serve client (rebuilds on file change):

npm run client:start

Build server (rebuilds on file change):

npm run server:watch

Start server (reboots on file change):

npm run server:nodemon

Open client: http://localhost:8000.

For convenience, url #hash will pre-fill the username of each client to make dev/testing quicker:

• http://localhost:8080/#foo
• http://localhost:8080/#bar

The demo map is a donut:

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[]  []
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Players spawn in the north-west room.

License

MIT