.babelrc

{
  "presets": [["airbnb", {
    "modules": false,
    "looseClasses": true,
    "additionalTargets": {
      "chrome": "30",
      "android": "4",
      "firefox": "25",
      "ios": "6",
      "safari": "6",
      "ie": "9",
      "edge": "12",
      "opera": "13",
    },
  }]],

  "env": {
    "test": {
      "presets": ["airbnb"],
      "plugins": ["istanbul"],
    },
  },
}