Play Framework Client ready bootstrap – with: CommonJS entry point in client/js/index.js and stylus entry points in client/stylus/themes/*.styl – 2 commands: npm run watch # for dev / npm run build # for prod

client_js_index.js

if (process.env.NODE_ENV !== "production")
  document.write('<script src="//localhost:9241"></script>');

package.json

{
  "private": true,
  "name": "??????????????",
  "version": "1.0.0",
  "scripts": {
    "build": "npm run build-js && npm run build-css",
    "build-js": "export NODE_ENV=production; browserify client/js/index.js | uglifyjs -cm > public/javascripts/bundle.js",
    "build-css": "stylus -u nib -c client/stylus/themes/ -o public/stylesheets/themes/",
    "watch": "npm run watch-js & npm run watch-css & npm run live-reload",
    "watch-js": "watchify --debug client/js/index.js -o public/javascripts/bundle.js",
    "watch-css": "stylus -u nib --sourcemap-inline -w client/stylus/themes/ -o public/stylesheets/themes/",
    "live-reload": "live-reload public/ --port=9241 --delay=1500"
  },
  "devDependencies": {
    "browserify": "^10.2.4",
    "live-reload": "^1.1.0",
    "stylus": "^0.51.1",
    "uglify-js": "^2.4.23",
    "envify": "^3.4.0",
    "watchify": "^3.2.2"
  },
  "browserify": {
    "transform": [
      "envify"
    ]
  },
  "dependencies": {
    "nib": "1.1.0"
  }
}