(test
 (name websockets_hello)
 (libraries portal_ws lwt js_of_ocaml)
 (modes js)
 (preprocess (pps js_of_ocaml-ppx))
 (deps node_modules)
 (js_of_ocaml
  (javascript_files polyfill.js)))

(rule
 (alias npm)
 (target node_modules)
 (deps package.json package-lock.json)
 (action (system "npm ci")))