next.js/examples/with-configured-preset-env/.babelrc

{
  "env": {
    "production": {
      "presets": ["next/babel"]
    },
    "development": {
      "presets": [
        [
          "next/babel",
          {
            "preset-env": {
              "targets": {
                "browsers": "last 1 Chrome version",
                "node": true
              }
            },
            "transform-runtime": {
              "regenerator": false
            }
          }
        ]
      ]
    }
  }
}