webpack.config.js

module.exports = (env={}, argv={}) => {
  return {
    devtool: 'source-map',
    module: {
      rules: [
        {
          test: /\.js$/,
          use: "babel-loader"
        },
        {
          test: /\.css$/,
          use: [
            'style-loader',
            'css-loader'
          ]
        },
        {
          test: /\.(gif|png|jpe?g|svg)$/i,
          use: [
            'file-loader',
            {
               loader: 'image-webpack-loader',
               options: {
                  disable: argv.mode === 'development'
               }
            }
          ]
        }
      ],
    },
    plugins: [
      argv.mode === "development"
        ? new HtmlWebpackPlugin() 
        : null
    ].filter(plugin => !!plugin)
  }
};