webpack.config.js

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

module.exports = {
  mode: 'production',
  devtool: 'none',
  entry: ['babel-polyfill', './index.js'],
  output: {
    filename: 'vue-share-it.js',
    libraryTarget: 'umd',
    library: 'lib',
    umdNamedDefine: true,
    globalObject: `(typeof self !== 'undefined' ? self : this)`
  },
  module: {
    rules: [
      {
        test: /\.m?js$/,
        exclude: /(node_modules)/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env']
          }
        }
      },
      {
        test: /\.vue$/,
        loader: 'vue-loader'
      },
      {
        test: /\.css$/i,
        use: ['style-loader', 'css-loader'],
      }
    ]
  },
  plugins: [
    new VueLoaderPlugin(),
    new CompressionPlugin()
  ]
}