.babelrc

{
  "env": {
    "production": {
      "presets": ["flow", "es2015", "stage-0", "react"],
      "plugins": [
        ["emotion", {"hoist": true}],
        ["relay"],
        [
          "transform-decorators-legacy"
        ],
        [
          "react-loadable/babel"
        ]
      ]
    },
    "development": {
      "presets": ["flow", "es2015", "stage-0", "react"],
      "plugins": [
        ["emotion"],
        ["relay"],
        [
          "transform-decorators-legacy"
        ],
        [
          "react-loadable/babel"
        ],
        ["transform-runtime"]
      ]
    },
    "test": {
      "presets": ["flow", "react"],
      "plugins": [
        ["emotion"],
        ["relay"],
        ["transform-class-properties"],
        ["transform-export-extensions"],
        ["transform-object-rest-spread"],
        ["transform-decorators-legacy"],
        ["transform-class-properties"],
        ["transform-es2015-modules-commonjs"],
        ["transform-es2015-destructuring"],
        [
          "transform-es2015-classes"
        ],
        [
          "react-loadable/babel"
        ]
      ]
    }
  }
}