cljs.repl.browser/repl-env*

(defn repl-env*
  [{:keys [output-dir host port] :or {host "localhost" port 9000} :as opts}]
  (merge (BrowserEnv.)
    {:host host
     :port port
     :launch-browser true
     :working-dir (->> [".repl" (util/clojurescript-version)]
                       (remove empty?) (string/join "-"))
     :static-dir (cond-> ["." "out/"] output-dir (conj output-dir))
     :preloaded-libs []
     :src "src/"
     :browser-state (atom {:return-value-fn nil
                           :client-js nil})
     :ordering (agent {:expecting nil :fns {}})
     :es (Executors/newFixedThreadPool 16)
     :server-state
     (atom
       {:socket nil
        :listeners 0})}
    opts))