webpack.config.js

const path = require('path');
const webpack = require('webpack');
var CompressionPlugin = require('compression-webpack-plugin');

module.exports = {
  entry: './src/index.js',
  output: {
    library: 'VueHtml2Canvas',
    libraryTarget: 'commonjs2',
    path: path.resolve(__dirname, 'dist'),
    filename: 'index.js'
  },
  module: {
    rules: [
      {
        test: /\.css$/,
        loader: 'style-loader!css-loader!'
      },
      {
        test: /\.js$/,
        exclude: /(node_modules)/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['env']
          }
        }
      }
    ]
  },
  plugins: [
    new webpack.optimize.UglifyJsPlugin({
      mangle: true,
      compress: {
        warnings: false, // Suppress uglification warnings
        pure_getters: true,
        unsafe: true,
        unsafe_comps: true,
        screw_ie8: true
      },
      output: {
        comments: false
      },
      exclude: [/\.min\.js$/gi] // skip pre-minified libs
    }),
    new CompressionPlugin({
      asset: '[path].gz[query]',
      algorithm: 'gzip',
      test: /\.js$|\.css$|\.html$/,
      threshold: 10240,
      minRatio: 0
    })
  ]
};