cljs.repl.browser/serve

(defn serve [{:keys [host port output-dir] :as opts}]
  (println "Serving HTTP on" host "port" port)
  (binding [ordering (agent {:expecting nil :fns {}})
            es (Executors/newFixedThreadPool 16)
            server/state (atom {:socket nil})]
    (server/start
      (merge opts
        {:static-dir (cond-> ["." "out/"] output-dir (conj output-dir))
         :gzip? true}))))