.babelrc

{
  "presets": [
    "@babel/preset-env",
    "@babel/preset-react"
  ],
  "plugins": [
    [
      "module-resolver",
      {
        "root": [
          "./src"
        ]
      }
    ],
    [
      "@babel/plugin-transform-runtime",
      {
        "regenerator": true
      }
    ],
    "@babel/plugin-syntax-dynamic-import",
    "@babel/plugin-syntax-import-meta",
    "@babel/plugin-proposal-class-properties",
    "@babel/plugin-proposal-json-strings",
    [
      "@babel/plugin-proposal-decorators",
      {
        "legacy": true
      }
    ],
    "@babel/plugin-proposal-function-sent",
    "@babel/plugin-proposal-export-namespace-from",
    "@babel/plugin-proposal-numeric-separator",
    "@babel/plugin-proposal-throw-expressions",
    "@babel/plugin-proposal-export-default-from",
    "@babel/plugin-proposal-logical-assignment-operators",
    "@babel/plugin-proposal-optional-chaining",
    [
      "@babel/plugin-proposal-pipeline-operator",
      {
        "proposal": "minimal"
      }
    ],
    "@babel/plugin-proposal-nullish-coalescing-operator",
    "@babel/plugin-proposal-do-expressions",
    "@babel/plugin-proposal-function-bind"
  ],
  "env": {
    "development": {
      "plugins": [
        [
          "react-css-modules",
          {
            "context": "src/client",
            "generateScopedName": "[name]__[local]___[hash:base64:5]",
            "webpackHotModuleReloading": true
          }
        ],
        "react-hot-loader/babel"
      ]
    },
    "production": {
      "plugins": [
        "@babel/plugin-transform-react-inline-elements",
        "@babel/plugin-transform-react-constant-elements",
        [
          "react-css-modules",
          {
            "context": "src/client",
            "generateScopedName": "[name]__[local]___[hash:base64:5]"
          }
        ]
      ]
    }
  }
}