webpack.config.js

const webpack = require('webpack');
const pkg = require('./package.json');
const path = require('path');
const libraryName = pkg.name;
module.exports = {
  entry: path.join(__dirname, "./src/index.js"),
  output: {
    path: path.join(__dirname),
    filename: 'index.js',
    library: libraryName,
    libraryTarget: 'umd',
    publicPath: '/build/',
    umdNamedDefine: true
  },
  node: {
    net: 'empty',
    tls: 'empty',
    dns: 'empty'
  },
  module: {
    rules: [
      {
        enforce: "pre",
        test: /\.js$/,
        exclude: /node_modules/,
        loader: "eslint-loader"
      },
      {
        test: /\.(js)$/,
        use: ["babel-loader"],
        include: path.resolve(__dirname, "src"),
        exclude: /node_modules/,
      },
    ]
  },
  resolve: {
    alias: {
      'react': path.resolve(__dirname, './node_modules/react'),
      'assets': path.resolve(__dirname, 'assets')
    }
  },
  externals: {
    // Don't bundle react or react-dom
    react: {
      commonjs: "react",
      commonjs2: "react",
      amd: "React",
      root: "React"
    },
    "react-dom": {
      commonjs: "react-dom",
      commonjs2: "react-dom",
      amd: "ReactDOM",
      root: "ReactDOM"
    }
  }
};