.babelrc

{
  "plugins":[
    "@babel/plugin-proposal-class-properties",
    "@babel/plugin-proposal-function-bind"
  ],
  "presets": [
    "@babel/preset-react",
    ["@babel/preset-env", {
      "targets": {
        "browsers": ["last 2 versions", "safari 7"]
      }
    }],
  ],
  "env": {
    "development": {
      "plugins": [
        ["react-transform", {
          "transforms": [{
            "transform": "react-transform-hmr",
            "imports": ["react"],
            "locals": ["module"]
          }, {
            "transform": "react-transform-catch-errors",
            "imports": ["react", "redbox-react"]
          }]
        }]
      ]
    }
  }
}