This document discusses ClojureScript and WebSockets. It provides an overview of WebSockets capabilities like async communication, full duplex communication, and server affinity. It then discusses several ClojureScript libraries for working with WebSockets, including ptaoussanis/sente, aleph, weavejester/haslett, and nilenso/wscljs. It calls out metosin/eines specifically, noting it is not ready for production and only supports the Immutant server, but is used by the author. It concludes by providing a link to a GitHub demo of ClojureScript and WebSockets.

1. Jarppe Länsiö

2. join@metosin.fi

3. ClojureScript and WebSockets

4. WebSockets
simple programming model
async communication model
cross-domain, no same source origin policy
full duplex communication, let your servers call clients too
ws connection maintains tcp/ip socket to your server
server affinity out of the box
good: sweet in-memory sessions
bad: slow dynamic scaling

5. ClojureScript story
Take your pick
ptaoussanis/sente
aleph
weavejester/haslett (cljs only)
nilenso/wscljs (cljs only)
metosin/eines
...propably more by now

6. metosin/eines
not ready for production
we use it, but the documentation etc is still missing
server side support for immutant only
why?
sessions
rpc
symmetric rpc

7. https://github.com/metosin/clojure-finland-2018-05-30-cljs-ws-demo
demo time