A previous post asking how to get vim-fireplace to work with a browser-repl from chestnut just got deleted. Here is my solution, in case anybody else has been wondering.
Ok I finally got this to work using the advice from /u/joshuadavey.
My precise steps:
Open vim
Back in the terminal, run lein repl
In the repl, do (run)
In vim, open the cljs file and do
:Piggieback (weasel.repl.websocket/repl-env :ip "0.0.0.0" :port 9001)
Open browser to http://localhost:10555/
In vim, cqc (js/alert "woohoo!")