{
  "presets": [
    "stage-0",
    [
      "env",
      {
        "modules": false
      }
    ],
    "react"
  ],
  "plugins": ["transform-class-properties"],  
  "env": {
    "cjs": {
      "presets": ["stage-0", "env", "react"],
      "plugins": ["transform-class-properties"]
    },
    "test": {
      "presets": ["es2015"]
    }
  }
}