webpack.config.js

// eslint-disable-next-line @typescript-eslint/no-var-requires
const path = require('path')

module.exports = {
  entry: {
    main: './src/index.ts'
  },
  mode: 'production',
  devtool: 'source-map',
  module: {
    rules: [
      {
        test: /\.ts(x?)$/,
        exclude: /node_modules/,
        use: [
          {
            loader: 'babel-loader',
            options: {
              presets: [
                '@babel/preset-react',
                '@babel/preset-typescript',
                '@babel/preset-env'
              ]
            }
          }
        ]
      },
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: [
          {
            loader: 'babel-loader',
            options: {
              presets: [
                '@babel/preset-react',
                '@babel/preset-typescript',
                '@babel/preset-env'
              ]
            }
          }
        ]
      },
      {
        test: /\.json$/,
        loader: 'json-loader'
      }
    ]
  },
  resolve: {
    extensions: ['.tsx', '.ts', '.jsx', '.js', '.json']
    // alias: {
    //   'simple-react-hooks$': path.resolve(__dirname, 'lib/src/index.d.ts')
    // }
  },
  output: {
    path: path.resolve(__dirname, 'dist/src'),
    filename: 'index.js',
    library: 'simple-react-hooks',
    libraryTarget: 'umd'
  },
  externals: {
    react: {
      root: 'React',
      commonjs2: 'react',
      commonjs: 'react',
      amd: 'react'
    },
    'react-dom': {
      root: 'ReactDOM',
      commonjs2: 'react-dom',
      commonjs: 'react-dom',
      amd: 'react-dom'
    }
  }
}