webpack.config.js

const path = require('path');

module.exports = {
  entry: './src/index.tsx',
  mode: process.env.NODE_ENV || 'development',
  module: {
    rules: [
      {
        test: /\.(ts|tsx)?$/,
        use: 'ts-loader',
        exclude: /node_modules/,
      },
      {
        test: /\.css$/,
        use: ['style-loader', 'css-loader'],
      },
      {
        test: /\.(png|jpe?g|gif|svg)$/i,
        use: ['@svgr/webpack', 'url-loader'],
      },
    ],
  },
  resolve: {
    modules: [path.join(__dirname, './src'), path.join(__dirname, './node_modules')],
    extensions: ['.tsx', '.ts', '.js'],
  },
  output: {
    filename: 'index.js',
    path: path.resolve(__dirname, 'lib'),
    library: {
      name: 'react-tweet-card',
      type: 'umd',
    },
    globalObject: 'this',
  },
  externals: [
    {
      react: {
        root: 'React',
        commonjs2: 'react',
        commonjs: 'react',
        amd: 'react',
      },
      'react-dom': {
        root: 'ReactDOM',
        commonjs2: 'react-dom',
        commonjs: 'react-dom',
        amd: 'react-dom',
      },
    },
  ],
};