.babelrc

{
  "plugins": [
    "transform-flow-strip-types",
    "transform-class-properties",
    ["transform-es2015-template-literals", { "loose": true }],
    "transform-es2015-literals",
    "transform-es2015-function-name",
    "transform-es2015-arrow-functions",
    "transform-es2015-block-scoped-functions",
    ["transform-es2015-classes", { "loose": true }],
    "transform-es2015-object-super",
    "transform-es2015-shorthand-properties",
    ["transform-es2015-computed-properties", { "loose": true }],
    ["transform-es2015-for-of", { "loose": true }],
    "check-es2015-constants",
    ["transform-es2015-spread", { "loose": true }],
    "transform-es2015-parameters",
    ["transform-es2015-destructuring", { "loose": true }],
    "transform-es2015-block-scoping",
    "transform-object-rest-spread",
    "transform-react-jsx",
    "syntax-jsx"
  ],
  "env": {
    "build": {
      "plugins": [
        "external-helpers"
      ]
    },
    "test": {
      "plugins": [
        "transform-es2015-modules-commonjs"
      ]
    }
  }
}