.babelrc

{
  "presets": ["es2015"],
  "plugins": [
    "check-es2015-constants",
    "transform-es2015-arrow-functions",
    "transform-es2015-block-scoped-functions",
    "transform-es2015-block-scoping",
    "transform-es2015-classes",
    "transform-es2015-computed-properties",
    "transform-es2015-destructuring",
    "transform-es2015-duplicate-keys",
    "transform-es2015-for-of",
    "transform-es2015-function-name",
    "transform-es2015-literals",
    "transform-es2015-object-super",
    "transform-es2015-parameters",
    "transform-es2015-shorthand-properties",
    "transform-es2015-spread",
    "transform-es2015-sticky-regex",
    "transform-es2015-template-literals",
    "transform-es2015-unicode-regex",
    "transform-regenerator",

    "transform-object-rest-spread",
    "transform-runtime",
    [
      "transform-define", "scripts/define.js"
    ],
    [
      "module-resolver",
      {
        "alias": {
          "babel-runtime/core-js/object/get-prototype-of": "./src/polyfills/objectGetPrototypeOf",
          "babel-runtime/helpers/extends": "./src/polyfills/extends",
          "babel-runtime/helpers/inherits": "./src/polyfills/inherits",
          "babel-runtime/helpers/createClass": "./src/polyfills/createClass",
          "babel-runtime/helpers/possibleConstructorReturn": "./src/polyfills/possibleConstructorReturn"
        }
      }
    ]
  ],
  "env": {
    "cjs": {
      "plugins": [
        "transform-es2015-modules-commonjs"
      ]
    }
  }
}