.babelrc

{
  "presets": [
    [
      "next/babel",
      {
        "preset-react": {
          "runtime": "automatic",
          "importSource": "@emotion/react"
        }
      }
    ]
  ],
  "env": {
    "production": {
      "plugins": [
        [
          "@emotion",
          {
            "sourceMap": true,
            "autoLabel": "never",
            "labelFormat": true,
            "cssPropOptimization": true
          }
        ]
      ]
    },
    "development": {
      "plugins": [
        [
          "@emotion",
          {
            "sourceMap": true,
            "autoLabel": "always",
            "labelFormat": "[local]--[filename]",
            "cssPropOptimization": false
          }
        ]
      ]
    }
  }
}