webpack.common.js

const path = require('path');

const { CleanWebpackPlugin } = require('clean-webpack-plugin');

module.exports = {
  entry: {
    app: './app/index.jsx',
  },
  output: {
    filename: '[name].[hash].js',
    path: path.resolve(__dirname, 'build'),
    publicPath: '/',
  },
  resolve: {
    alias: {
      '@app': path.resolve(__dirname, 'app/'),
    },
    extensions: ['.js', '.jsx'],
  },
  plugins: [
    new CleanWebpackPlugin(),
  ],
  optimization: {
    splitChunks: {
      cacheGroups: {
        vendor: {
          chunks: 'all',
          test: path.resolve(__dirname, 'node_modules'),
          name: 'vendor',
          enforce: true,
        },
      },
    },
  },
  module: {
    rules: [
      // js[x]
      {
        test: /\.jsx?$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
        },
      },

      // fonts
      {
        test: /\.(woff(2)?|ttf|eot|svg)(\?v=[0-9]\.[0-9]\.[0-9])?$/,
        loader: 'file-loader?name=static/[name].[ext]',
      },

      // css
      {
        test: /\.css$/,
        use: ['style-loader', {
          loader: 'css-loader',
          options: {
            minimize: true,
          },
        }],
      },
    ],
  },
};