webpack.config.js

const HtmlWebPackPlugin = require('html-webpack-plugin')
const MiniCssExtractPlugin = require('mini-css-extract-plugin')

module.exports = {
  entry: {
    polyfill: 'babel-polyfill',
    app: './src/index.js'
  },
  module: {
    rules: [
      {
        test: /\.(png|woff|woff2|eot|ttf|svg)(\?v=[0-9]\.[0-9]\.[0-9])?$/,
        loader: 'url-loader?limit=100000'
      },
      {
        test: /\.(js|jsx)$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader'
        }
      },
      {
        test: /\.html$/,
        use: [
          {
            loader: 'html-loader',
            options: { minimize: true }
          }
        ]
      },
      {
        test: /\.(s)?css$/,
        use: [
          MiniCssExtractPlugin.loader,
          {
            loader: 'css-loader',
            options: {
              sourceMap: true
            }
          },
          {
            loader: 'sass-loader',
            options: {
              sourceMap: true
            }
          }
        ]
      }
    ]
  },
  output: {
    publicPath: '/'
  },
  plugins: [
    new HtmlWebPackPlugin({
      template: './src/index.html',
      filename: 'index.html'
    }),
    new MiniCssExtractPlugin({
      filename: '[name].css',
      chunkFilename: '[id].css'
    })
  ],
  devtool: 'source-map',
  devServer: {
    inline: true,
    historyApiFallback: true,
    hot: true
  }
}