webpack.config.js

const path = require('path')
const webpack = require('webpack')
const HtmlWebpackPlugin = require('html-webpack-plugin')

module.exports = {
  entry: path.join(__dirname, 'src/index.js'),
  output: {
    filename: '[name].js',
    path: path.resolve(__dirname, 'dev'),
    publicPath: '/'
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: ['babel-loader']
      },
      {
        test: /\.s?css$/,
        use: [
          'style-loader',
          {
            loader: 'css-loader',
            options: { sourceMap: true }
          },
          {
            loader: 'postcss-loader',
            options: {
              ident: 'postcss',
              plugins: () => [require('autoprefixer')()],
              sourceMap: true
            }
          },
          {
            loader: 'sass-loader',
            options: { sourceMap: true }
          }
        ]
      },
      {
        test: /\.(jpe?g|png|gif|woff2?|eot|ttf|otf|svg)$/,
        use: [{
          loader: 'url-loader',
          options: { limit: 25000 }
        }]
      }
    ]
  },
  resolve: {
    modules: [path.join(__dirname, 'src'), 'node_modules'],
    extensions: ['*', '.js', '.scss']
  },
  devtool: 'eval-source-map',
  devServer: {
    contentBase: path.join(__dirname, 'dev'),
    historyApiFallback: true,
    hot: true
  },
  plugins: [
    new webpack.NamedModulesPlugin(),
    new webpack.HotModuleReplacementPlugin(),
    new HtmlWebpackPlugin({
      template: path.join(__dirname, 'src/index.html'),
      favicon: path.join(__dirname, 'src/assets/favicon.ico')
    }),
    new webpack.DefinePlugin({
      'process.env': {
        'NODE_ENV': JSON.stringify('development')
      }
    })
  ]
}