.babelrc

{
  "presets": [
    [
      "env",
      {
        "targets": {
          "node": true,
          "browsers": "last 2 versions"
        }
      }
    ],
    "stage-1",
    "react"
  ],
  "plugins": [
    "styled-jsx/babel"
  ],
  "env": {
    "test": {
      "plugins": [
        [
          "minify-replace",
          {
            "replacements": [
              {
                "identifierName": "__ENV__",
                "replacement": {
                  "type": "stringLiteral",
                  "value": "test"
                }
              },
              {
                "identifierName": "__DEV__",
                "replacement": {
                  "type": "booleanLiteral",
                  "value": true
                }
              }
            ]
          }
        ],
        [
          "minify-dead-code-elimination",
          {
            "keepFnName": true,
            "keepFnArgs": true
          }
        ],
        "minify-guarded-expressions"
      ]
    },
    "development": {
      "plugins": [
        [
          "minify-replace",
          {
            "replacements": [
              {
                "identifierName": "__ENV__",
                "replacement": {
                  "type": "stringLiteral",
                  "value": "development"
                }
              },
              {
                "identifierName": "__DEV__",
                "replacement": {
                  "type": "booleanLiteral",
                  "value": true
                }
              }
            ]
          }
        ]
      ]
    },
    "production": {
      "plugins": [
        [
          "minify-replace",
          {
            "replacements": [
              {
                "identifierName": "__ENV__",
                "replacement": {
                  "type": "stringLiteral",
                  "value": "production"
                }
              },
              {
                "identifierName": "__DEV__",
                "replacement": {
                  "type": "booleanLiteral",
                  "value": false
                }
              }
            ]
          }
        ]
      ]
    }
  }
}