exports is not defined

若是babel 6, 可以看這位同仁的文章

https://www.cnblogs.com/vickya/p/8645061.html

若是babel 7 ， 設置

https://www.babeljs.cn/docs/babel-preset-env

{
  "presets": ["@babel/preset-react", ["@babel/preset-env",{"modules": "commonjs"}]],
  "plugins": [
    [
      "import", {
        "libraryName": "antd",
        "libraryDirectory": "es",
        "style": "css"
      }
    ],
    ["@babel/plugin-proposal-class-properties"],
    "@babel/plugin-transform-runtime"
  ]
}

對@babel/preset-env增加配置{"modules": "commonjs"} 即可