Promises are going to solve this problem in an elegant way, expect it in next major release. That said, I've release a client/server game (online sailing regat

Promises are going to solve this problem in an elegant way, expect it in next major release. That said, I've release a client/server game (online sailing regattas) in Elm & Play/Scala with websockets, and current API was enough for me: https://github.com/etaque/tacks https://github.com/etaque/tacks