.babelrc

{
  "env": {
    // this plugin will be included only in development mode, e.g.
    // if NODE_ENV (or BABEL_ENV) environment variable is not set
    // or is equal to "development"
    "hot": {
      "plugins": [
        // must be an array with options object as second item
        ["react-transform", {
          "transforms": [{
            // can be an NPM module name or a local path
            "transform": "react-transform-hmr",
            // see transform docs for "imports" and "locals" dependencies
            "imports": ["react"],
            "locals": ["module"]
          }, {
            "transform": "react-transform-catch-errors",
            "imports": ["react", "redbox-react"]
          }]
        }],
        ["transform-runtime"]
      ]
    }
  }
}