.babelrc

{
  "env": {
    "es5": {
      "presets": [
        [
          "env",
          {
            "targets": {
              "browsers": [
                "Chrome >= 36",
                "Edge >= 12",
                "Firefox >= 6",
                "Explorer >= 11",
                "Opera >= 23",
                "Safari >= 8",
                "Android >= 36",
                "ChromeAndroid >= 36",
                "FirefoxAndroid >= 6",
                "ExplorerMobile >= 11",
                "OperaMobile >= 23",
                "iOS >= 8"
              ],
              "node": "6"
            }
          }
        ],
        "react"
      ],
      "plugins": [
        "transform-flow-strip-types",
        "transform-class-properties",
        "add-module-exports"
      ]
    },
    "es6": {
      "presets": [
        [
          "env",
          {
            "targets": {
              "node": "9"
            },
            "modules": false
          }
        ],
        "react"
      ],
      "plugins": ["transform-flow-strip-types", "transform-class-properties"]
    }
  }
}