.babelrc

{
    "plugins": ["dev-expression", "lodash", "transform-proto-to-assign"],
    "env": {
      "development": {
        "presets": [
          [
            "env",
            {
              "targets": {
                "node": "current",
                "browsers": ["last 2 versions", "ie >= 9"]
              },
              "modules": "commonjs",
              "loose": true
            }
          ],
          "react",
          "stage-1"
        ]
      },
      "rollup": {
        "presets": [
          [
            "env",
            {
              "targets": {
                "node": "current",
                "browsers": ["last 2 versions", "ie >= 9"]
              },
              "modules": false,
              "loose": true
            }
          ],
          "react",
          "stage-1"
        ],
        "plugins": ["external-helpers", "./build/use-lodash-es"]
      },
      "jsnext": {
        "presets": [
          [
            "env",
            {
              "targets": {
                "node": "current",
                "browsers": ["last 2 versions", "ie >= 9"]
              },
              "modules": false,
              "loose": true
            }
          ],
          "react",
          "stage-1"
        ],
        "plugins": ["./build/use-lodash-es"]
      }
    }
  }