.babelrc

{
  "presets": [
    ["env", {
      "targets": { "node": 8 },
      "useBuiltIns": true
    }],
    "stage-0",
    "react"
  ],
  "plugins": ["add-module-exports" ],
  "env": {
    "production": {
      "presets": ["react-optimize"],
      "plugins": ["babel-plugin-dev-expression",  [ "babel-plugin-webpack-alias", { "config": "./webpack.config.base.js" } ]]
    },
    "development": {
      "plugins": [
        "transform-class-properties",
        "transform-es2015-classes",
        "react-hot-loader/babel",
        [ "babel-plugin-webpack-alias", { "config": "./webpack.config.base.js" } ],
        ["flow-runtime", {
          "assert": true,
          "annotate": true
        }]
      ]
  },
  "test" : {
        "presets" : [
            ["env", {
              "targets": { "node": 8 },
              "useBuiltIns": true
            }],
          "stage-0",
          "es2015",
          "react"
      ],
      "plugins": [
          "transform-es2015-modules-commonjs",
          "transform-class-properties",
          "transform-es2015-classes"
        ]
    }
  }
}