webpack.config.js

const path = require('path');
const webpack = require('webpack');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');

const VENDOR_LIBS = ['react', 'tone', 'react-dom'];

module.exports = {
  entry: {
    bundle: './src/index.js',
    vendor: VENDOR_LIBS
  },
  output: {
    path: path.join(__dirname, 'dist'),
    filename: '[name].[chunkhash].js'
  },
  module: {
    rules: [
      {
        use: 'babel-loader',
        test: /\.js$/,
        exclude: /node_modules/
      },
      {
        loader: ExtractTextPlugin.extract({
          loader: 'css-loader'
        }),
        test: /\.css$/
      },
      {
        test: /\.(jpe?g|png|gif|svg)$/,
        use: [
          {
            loader: 'url-loader',
            options: { limit: 40000 }
          },
          'image-webpack-loader'
        ]
      },
      {
        test: /\.wav$/,
        use: 'file-loader'
      }
    ]
  },
  plugins: [
    new ExtractTextPlugin('style.css'),
    new webpack.optimize.CommonsChunkPlugin({
      names: ['vendor', 'manifest']
    }),
    new HtmlWebpackPlugin({
      template: 'index.html'
    }),
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify(process.env.NODE_ENV)
    }),
    new CopyWebpackPlugin([
      { from: 'src/components/assets/samples/', to: 'assets/samples/' }
    ])
  ]
};