webpack.prod.config.js

const TerserPlugin = require('terser-webpack-plugin');
const { VueLoaderPlugin } = require('vue-loader');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const CssMinimizerPlugin = require('css-minimizer-webpack-plugin');
const webpack = require('webpack');

module.exports = {
  mode: 'production',
  entry: './src/index.js',
  output: {
    filename: 'vue-step-progress.min.js',
    library: 'StepProgress',
    libraryTarget: 'umd'
  },
  optimization: {
    minimizer: [
      new TerserPlugin({
        parallel: true,
        terserOptions: {
          compress: {
            drop_console: true,
          }
        }
      }),
      new CssMinimizerPlugin(),
    ]
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        loader: 'babel-loader'
      },
      {
        test: /\.css$/,
        use: [
          MiniCssExtractPlugin.loader,
          'css-loader'
        ]
      },
      {
        test: /\.sass$/,
        use: [
          MiniCssExtractPlugin.loader,
          'css-loader',
          {
            loader: 'sass-loader',
            options: {
              sassOptions: {
                indentedSyntax: true
              }
            }
          }
        ]
      },
      {
        test: /\.pug$/,
        loader: 'pug-plain-loader'
      },
      {
        test: /\.vue$/,
        loader: 'vue-loader'
      }
    ],
  },
  externals: {
    'vue': 'vue',
  },
  plugins: [
    new VueLoaderPlugin(),
    new webpack.DefinePlugin({
      __VUE_OPTIONS_API__: true,
      __VUE_PROD_DEVTOOLS__: false,
    }),
    new MiniCssExtractPlugin(),
  ],
  devtool: 'source-map',
  target: 'web'
};