webpack.config.js

const MiniCssExtractPlugin = require('mini-css-extract-plugin')
const OptimizeCssAssetsPlugin = require('optimize-css-assets-webpack-plugin')
const VueLoaderPlugin = require('vue-loader/lib/plugin')

var path = require('path')

module.exports = {
  entry: {
    app: ['./src/js/ModelVisualizer.js']
  },
  output: {
    path: path.resolve(__dirname, 'public'),
    filename: 'model-visualizer.js',
    library: 'ModelVisualizer',
    libraryExport: 'default'
  },
  module: {
    rules: [
      {
        test: /\.vue$/,
        loader: 'vue-loader'
      },
      {
        test: /\.js$/,
        loader: 'babel-loader'
      },
      {
        test: /\.css$/,
        use: [
          {
            loader: MiniCssExtractPlugin.loader
          },
          'css-loader'
        ]
      }
    ]
  },
  plugins: [
    new MiniCssExtractPlugin({
      // Options similar to the same options in webpackOptions.output
      // both options are optional
      filename: 'model-visualizer.css'
    }),
    new OptimizeCssAssetsPlugin({
      assetNameRegExp: /\.css$/g,
      cssProcessorPluginOptions: {
        preset: ['default', { discardComments: { removeAll: true } }]
      }
    }),
    new VueLoaderPlugin()
  ],
  externals: {
    vue: 'Vue'
  }
}