webpack.config.js

const MiniCssExtractPlugin = require('mini-css-extract-plugin')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const PreloadWebpackPlugin = require('@vue/preload-webpack-plugin')
const path = require('path')

const mode = process.env.NODE_ENV || 'development'
const prod = mode === 'production'

module.exports = {
  entry: './src/main.js',
  resolve: {
    extensions: ['.mjs', '.js', '.svelte']
  },
  output: {
    path: path.resolve(__dirname, './dist'),
    filename: 'js/[name].[hash].js',
    chunkFilename: 'js/[name].[hash].js',
    publicPath: '/'
  },
  module: {
    rules: [
      {
        test: /\.svelte$/,
        exclude: /node_modules/,
        use: {
          loader: 'svelte-loader',
          options: {
            emitCss: true,
            hotReload: true
          }
        }
      },
      {
        test: /\.css$/,
        use: [
          /**
           * MiniCssExtractPlugin doesn't support HMR.
           * For developing, use 'style-loader' instead.
           * */
          prod ? MiniCssExtractPlugin.loader : 'style-loader',
          'css-loader'
        ]
      }
    ]
  },
  mode,
  plugins: [
    new MiniCssExtractPlugin({
      filename: 'css/[name].[hash].css'
    }),
    new HtmlWebpackPlugin({
      template: 'public/index.html',
      minify: prod
        ? {
          collapseWhitespace: true
        }
        : false
    }),
    new PreloadWebpackPlugin({
      rel: 'prefetch'
    })
  ],
  devtool: prod ? false : 'source-map'
}