npmscripts.json

{
  "scripts": {
    "watch:js": "babel -w ./src/js/ --out-dir ./ --presets=\"es2015\"",
    "build:js": "babel ./src/js/ --out-dir ./ --presets=\"es2015\"",
    "serve": "browser-sync start --server --files=\"./*.html, ./*.js\"",
    "test": "echo \"Error: no test specified\" && exit 1"
  },

  "devDependencies": {
    "babel-cli": "^6.6.5",
    "babel-preset-es2015": "^6.6.0",
    "watch": "^0.17.1"
  }
}