rsnext/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,
	    "useBuiltIns": true,
	    "polyfill": false
	  }
        }]
      ]
    }
  }
}