.babelrc

{
  "env": {
    "es": {
      "presets": [
        ["env", {
          "modules": false
        }],
        "stage-0"
      ],
      "plugins": [
        "transform-flow-strip-types",
        "transform-decorators-legacy",
        "transform-class-properties",
        "transform-runtime",
        "lodash", ["module-resolver", {
          "root": ["./src"],
          "alias": {}
        }],
        ["babel-plugin-transform-builtin-extend", {
            "globals": ["Error", "Array", "Map"],
            "approximate": true
        }]
      ],
    },
    "normal": {
      "presets": [
        ["env"],
        "stage-0"
      ],
      "plugins": [
        "transform-flow-strip-types",
        "transform-decorators-legacy",
        "transform-class-properties",
        "transform-runtime",
        "lodash", ["module-resolver", {
          "root": ["./src"],
          "alias": {}
        }]
      ],
    }
  },
}