.babelrc

{
  "presets": ["@babel/env", "@babel/react"],
  "plugins": [
    // NOTE: plugin-proposal-decorators needs to precede plugin-proposal-class-properties.
    ["@babel/plugin-proposal-decorators", { "legacy": true }],
    ["@babel/plugin-proposal-class-properties", { "loose": false }]
  ],
  "env": {
    "production": {
      "plugins": [
        [
          "transform-rename-import",
          {
            "original": "./react-lifecycle-visualizer.scss",
            "replacement": "./react-lifecycle-visualizer.css"
          }
        ]
      ]
    }
  }
}