webpack.config.js

const path = require('path');
const CopyWebpackPlugin = require('copy-webpack-plugin');

module.exports = env => {
  let config = {
    mode: 'production',
    module: {
      rules: [
        {
          test: /.*\.js$/,
          include: [
            path.resolve(__dirname, 'crypto'),
            path.resolve(__dirname, 'web3c'),
            path.resolve(__dirname, 'test')
          ],
          exclude: [
            path.resolve(__dirname, 'node_modules')
          ],
          use: [
            'babel-loader',
          ]
        }
      ]
    },
    entry: './index.browser',
    resolve: {
      modules: [
        'node_modules',
        path.resolve(__dirname, 'crypto'),
        path.resolve(__dirname, 'web3c')
      ],
      extensions: ['.js']
    },
    output: {
      path: path.join(__dirname, 'output'),
      filename: 'web3c.js',
      chunkFilename: '[name].js',
    },
    plugins: [
      new CopyWebpackPlugin([{ from: 'demo/', to: './' }])
    ],
    devtool: 'source-map',
    target: 'web'
  };
  if (env.mode == 'development') {
    delete config['plugins'];
  }
  return config;
};