.babelrc

//{
//  "presets": [
//    ["@babel/preset-env", {
//      "targets": {
//        "chrome": 52,
//        "browsers": ["last 2 versions", "safari 7"]
//      }
//    }],
//    "@babel/react"
//  ],
//  "plugins": [
//    ["@babel/plugin-transform-runtime", {
//      "helpers": false,
//      "polyfill": false,
//      "regenerator": true,
//      "moduleName": "@babel/runtime"
//    }],
//    ["@babel/plugin-proposal-decorators", { "legacy": true }],
//    ["@babel/plugin-proposal-class-properties", { "loose": true }]
//  ],
//  "env": {
//    "development": {
//      "plugins": ["react-hot-loader/babel"]
//    },
//    "production": {
//      "plugins": ["@babel/plugin-transform-classes"]
//    }
//  }
//}

{
  "presets": [ "react",  ["env", {
    "targets": {
     "browsers": [ ">0.25%", "not ie 11", "not op_mini all"]
    }
  }], "stage-0" ],
  "env": {
   "production": {
      "presets": ["minify"]
    }
  },
  "plugins": [
    [ "transform-object-rest-spread", { "useBuiltIns": true } ],
    "transform-es2015-destructuring",
    "transform-object-rest-spread",
    "transform-runtime",
    "transform-decorators-legacy",
    "transform-class-properties"
  ]
}