deps.edn

{:paths #{"src" "test"}

 :deps
 {org.clojure/clojure {:mvn/version "1.9.0"}
  org.clojure/clojurescript {:mvn/version "1.10.339"}

  binaryage/devtools {:mvn/version "0.9.10"}
  refactor-nrepl {:mvn/version "2.4.0"}
  cider/cider-nrepl {:mvn/version "0.18.0"}
  cider/nrepl {:mvn/version "0.3.0"}}

 :aliases
 {:outdated
  {:extra-deps
   {olical/depot {:mvn/version "1.2.0"}}
   :main-opts ["-m" "depot.outdated.main"]}
  
  :test
  {:extra-deps
   {olical/cljs-test-runner {:mvn/version "2.1.0"}}
   :main-opts ["-m" "cljs-test-runner.main"]}}} 

package.json

{
  "dependencies": {
    "@cljs-oss/module-deps": "^1.1.1",
    "react": "^16.4.2",
    "react-dom": "^16.4.2",
  },
  "devDependencies": {
    "shadow-cljs": "^2.6.6"
  }
} 

shadow-cljs.edn

{:source-paths
 ["src"]

 :deps true

 :nrepl {:port 33333}

 :builds
 {:app {:target :browser
        :output-dir "public/js"
        :asset-path "/js"
        :modules {:main
                  {:entries [a.init]}}
        :devtools
        {:http-root "public"
         :http-port 3000
         :preloads [devtools.preload]
         :after-load a.core/reload}}}}