webpack config template

webpack.config.js

const config = {
  entry: {
    main: __dirname + '/app/main.js'
  },
  output: {
    path: __dirname + '/public',
    filename: 'bundle.js'
  },
  module: {
    rules: [
      {
        test: /(\.jsx|\.js)$/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: [
              '@babel/preset-env', '@babel/preset-react'
            ]
          }
        },
        exclude: /node_modules/
      },
      {
        test: /\.css$/,
        use: [
          {
            loader: 'style-loader'
          },
          {
            loader: 'css-loader',
            options: {
              modules: {
                localIdentName: '[name]__[local]--[hash:base64:5]'
              }
            }
          },
          {
            loader: 'postcss-loader'
          }
        ]
      }
    ]
  },
  plugins: [
  ],
}

const developmentConfig = {
  ...config,
  mode: 'development',
  devtool: 'eval-source-map',
  devServer: {
    contentBase: './public',
    historyApiFallback: true,
    inline: true
  }
}

const productionConfig = {
  ...config,
  mode: 'production',
  devtool: 'null',
  devServer: {
    contentBase: './public',
    historyApiFallback: true,
    inline: true
  }
}
  
const serverConfig = {
  ...config,
  target: 'node'
}
      
module.exports = [ process.env === 'PRODUCTION' ? productionConfig : developmentConfig,
                   serverConfig ]