.babelrc

{
  "plugins": [
    "transform-react-jsx",
    "transform-class-properties",
    "transform-object-rest-spread",
    "transform-es2015-destructuring"
  ],
  "env": {
    "build": {
      "presets": [
        ["env", {
          "modules": false
        }], "stage-3", "react"
      ],
      "plugins": [
        "external-helpers",
        "transform-class-properties",
        "transform-object-rest-spread", ["transform-es2015-classes", {
          "loose": true
        }]
      ]
    },
    "buildProd": {
      "presets": [
        ["env", {
          "modules": false
        }], "stage-3", "react"
      ],
      "plugins": [
        "external-helpers",
        "transform-class-properties",
        "transform-object-rest-spread", ["transform-es2015-classes", {
          "loose": true
        }]
      ]
    },
    "es": {
      "presets": [
        ["env", {
          "modules": false
        }], "stage-3", "react"
      ],
      "plugins": ["transform-class-properties", "transform-object-rest-spread"]
    },
    "commonjs": {
      "plugins": [
        ["transform-es2015-modules-commonjs", {
          "loose": true
        }],
        "transform-class-properties",
        "transform-object-rest-spread", ["transform-es2015-classes", {
          "loose": true
        }]
      ],
      "presets": ["stage-3", "react"]
    },
    "test": {
      "presets": ["env", "stage-3", "react"],
      "plugins": ["transform-class-properties"]
    }
  }
}