Boot node cljs repl

build.boot

(set-env!
  :target-path "target"
  :source-paths #{"src"}
  :dependencies '[[org.clojure/clojure "1.9.0-RC1"]
                  [org.clojure/clojurescript "1.9.946"]
                  [figwheel-sidecar "0.5.14"]])

(require '[figwheel-sidecar.repl-api :as ra])

(deftask cljs-repl []
  (ra/start-figwheel!)
  (ra/cljs-repl))

figwheel.edn

{:builds [{:id "dev"
           :source-paths ["src"]
           :figwheel true
           :compiler {:main my-ns.core
                      :output-to "target/app.js"
                      :output-dir "target/compiled"
                      :optimizations :none
                      :target :nodejs}}]}

src-my_ns-core.cljs

(ns my-ns.core)

(.log js/console "Hello from node")

Don't forget yarn add ws for figwheel.