.babelrc

{
  "plugins": [
    "lodash",
    ["transform-define", "src/env-config.js"],
    ["syntax-dynamic-import", { "useBuiltIns": true }],
    ["transform-object-rest-spread", { "useBuiltIns": true }],
    ["transform-decorators-legacy", { "useBuiltIns": true }],
    ["transform-class-properties", { "useBuiltIns": true }]
  ],
  "presets": [
    [ "env", {
      "targets": {
        "browsers": ["> 1%", "last 2 versions"]
      },
      "useBuiltIns": true,
      "modules": false,
      "loose": true,
      "exclude": [
        "transform-regenerator",
        "es6.set",
        "es6.map",
        "es6.weak-map",
        "es6.weak-set",
        "es6.typed.array-buffer",
        "es6.typed.int8-array",
        "es6.typed.uint8-array",
        "es6.typed.uint8-clamped-array",
        "es6.typed.int16-array",
        "es6.typed.uint16-array",
        "es6.typed.int32-array",
        "es6.typed.uint32-array",
        "es6.typed.float32-array",
        "es6.typed.float64-array",
        "es6.reflect.apply",
        "es6.reflect.construct",
        "es6.reflect.define-property",
        "es6.reflect.delete-property",
        "es6.reflect.get",
        "es6.reflect.get-own-property-descriptor",
        "es6.reflect.get-prototype-of",
        "es6.reflect.has",
        "es6.reflect.is-extensible",
        "es6.reflect.own-keys",
        "es6.reflect.prevent-extensions",
        "es6.reflect.set",
        "es6.reflect.set-prototype-of"
      ]
    }]
  ]
}