index.js

import { Button } from 'antd';

export default function () {
  return <Button>按钮</Button>;
}

webpack.config.js

module.exports = {
  mode: 'production',
  entry: './index.js',
  output: {
    path: path.resolve(__dirname, './dist'),
    filename: '[name].[hash].js',
    publicPath: '/',
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: 'babel-loader',
      },
      {
        test: /\.(css|scss)$/,
        use: [
          'css-loader',
          'postcss-loader',
          'sass-loader',
        ],
      },
    ]
  },
  plugins: [
    new AntdDayjsWebpackPlugin(),
    new BundleAnalyzerPlugin({ analyzerMode: 'static' }),
  ],
}

babel配置：

"presets": ["@babel/preset-env", "@babel/preset-react"],
  "plugins": [
    "@babel/plugin-syntax-dynamic-import",
    "@babel/plugin-transform-runtime",
    [
      "babel-plugin-import",
      {
        "libraryName": "antd",
        "libraryDirectory": "es",
        "camel2DashComponentName": false,
        "style": "css"
      }
    ],
    ["@babel/plugin-proposal-decorators", { "legacy": true }],
    ["@babel/plugin-proposal-class-properties", { "loose": true }],
    "dva-hmr"
  ]

只用一个组件，打包出来的东西很大,700多k，求解