webpack.common.js

module.exports = {
  output: {
    libraryTarget: 'umd',
    globalObject: 'this',
  },
  mode: 'production',
  resolve: {
    extensions: ['.ts', '.tsx', '.json', '.js'],
  },
  module: {
    rules: [
      {
        test: /\.jsx?$/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/typescript', '@babel/env', '@babel/react'],
            plugins: [
              ['@babel/plugin-proposal-decorators', { legacy: true }],
              ['@babel/plugin-proposal-class-properties', { loose: true }],
              '@babel/proposal-object-rest-spread',
            ],
          },
        },
      },
      {
        test: /\.tsx?$/,
        exclude: /(node_modules|bower_components)/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: [
              '@babel/typescript',
              [
                '@babel/env',
                {
                  loose: true,
                  modules: false,
                },
              ],
              '@babel/react',
            ],
            plugins: [
              'babel-plugin-transform-async-to-promises',
              ['@babel/plugin-proposal-decorators', { legacy: true }],
              ['@babel/plugin-proposal-class-properties', { loose: true }],
              '@babel/proposal-object-rest-spread',
            ],
          },
        },
      },
    ],
  },
  externals: [
    {
      react: 'React',
    },
  ],
};