.babelrc

{
  "env": {
    "commonjs": {
      "presets": [
        "es2015",
        "react",
        "stage-1"
      ]
    },
    "development": {
      "presets": [
        "es2015",
        "react",
        "stage-1"
      ]
    },
    "es": {
      "plugins": [
        "transform-runtime"
      ],
      "presets": [
        "es2015",
        "react",
        "stage-1"
      ]
    },
    "umd": {
      "plugins": [
        "transform-runtime",
        "transform-es2015-modules-umd"
      ],
      "presets": [
        "es2015",
        "react",
        "stage-1"
      ]
    },
    "production": {
      "comments": false,
      "plugins": [
        "transform-runtime"
      ],
      "presets": [
        "es2015",
        "react",
        "stage-1"
      ]
    },
    "test": {
      "comments": false,
      "presets": [
        "es2015",
        "react",
        "stage-1"
      ]
    }
  }
}