.babelrc

{
  "presets": [
    ["env", {
      "targets": {
        "browsers": [
          "last 3 Chrome versions",
          "last 3 Firefox versions",
          "last 3 Opera versions",
          "Explorer >= 10",
          "Safari >= 8",
          "iOS >= 8",
          "Android >= 4.4"
        ]
      }
    }]
  ],
  "plugins": [
    "babel-plugin-add-module-exports"
  ]
}