.babelrc

{
  "passPerPreset": true,
  "plugins": [
    "lodash",
    "transform-undefined-to-void",
    ["typecheck", {
      "disable": {
        "production": true
      }
    }]
  ],
  "presets": [
    "es2015"
  ],
  "env": {
    "production": {
      "plugins": [
        "transform-member-expression-literals",
        "transform-merge-sibling-variables",
        "transform-minify-booleans",
        "transform-property-literals",
        "transform-remove-debugger",
        "transform-simplify-comparison-operators"
      ]
    }
  }
}