webpack.base.js

const path = require('path')

module.exports = {
  entry: './src/index.js',
  output: {
    path: path.resolve(__dirname, './dist'),
    filename: 'index.js',
    library: 'Tool Tiles',
    libraryTarget: 'umd',
    publicPath: '/dist/',
  },
  module: {
    rules: [
      {
        test: /\.jsx?$/,
        exclude: /(node_modules|bower_components|dist)/,
        loader: 'babel-loader',
      },
    ],
  },
  resolve: {
    alias: {
      react: path.resolve('../node_modules/react'),
      'react-dom': path.resolve('../node_modules/react-dom'),
      'styled-components': path.resolve('../node_modules/styled-components'),
    },
  },
  externals: {
    'styled-components': {
      commonjs: 'styled-components',
      commonjs2: 'styled-components',
      amd: 'styled-components',
    },
    react: {
      commonjs: 'react',
      commonjs2: 'react',
      amd: 'react',
    },
    'react-dom': {
      commonjs: 'react-dom',
      commonjs2: 'react-dom',
      amd: 'react-dom',
    },
  },
}