webpack.config.prod.js

const path = require('path');
const webpack = require('webpack');
const VueLoaderPlugin = require('vue-loader/lib/plugin');
const CompressionPlugin = require("compression-webpack-plugin")

const NODE_ENV = process.env.NODE_ENV;

const setPath = function(folderName) {
  return path.join(__dirname, folderName);
}

const config = {
  entry: {
    app: './src/doughnut-chart.js'
  },
  output: {
    filename: "doughnut-chart.js",
    library: 'DoughnutChart',
    libraryTarget: 'commonjs2'
  },
  resolveLoader: {
    modules: [
      setPath('node_modules')
    ]
  },
  mode: 'production',
  plugins: [
    new webpack.DefinePlugin({
      'process.env': {
        isStaging: (NODE_ENV === 'development'),
        NODE_ENV: '"'+NODE_ENV+'"'
      }
    }),
    new VueLoaderPlugin(),
    new CompressionPlugin({
      algorithm: 'gzip'
    })
  ],
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [
          'vue-style-loader',
          'css-loader'
        ],
      },
      {
        test: /\.scss$/,
        use: [
          'vue-style-loader',
          'css-loader',
          'sass-loader'
        ],
      },
      {
        test: /\.sass$/,
        use: [
          'vue-style-loader',
          'css-loader',
          'sass-loader?indentedSyntax'
        ],
      },
      {
        test: /\.vue$/,
        loader: 'vue-loader',
        options: {
          loaders: {
            js: 'babel-loader',
            scss: 'vue-style-loader!css-loader!sass-loader',
            sass: 'vue-style-loader!css-loader!sass-loader?indentedSyntax'
          }
        }
      },
      {
        test: /\.m?js$/,
        exclude: /(node_modules|bower_components)/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env']
          }
        }
      }
    ]
  }
};
module.exports = config;