webpack.config.js

const path = require('path');

const TerserJSPlugin = require('terser-webpack-plugin');
const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');

const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');

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

module.exports = {
  mode,
  devtool: prod ? false : 'source-map',
  entry: {
    bundle: ['./resources/index.js'],
  },
  output: {
    path: path.resolve(__dirname, 'public'),
    filename: '[name].[contenthash].js',
    chunkFilename: '[name].[contenthash].[id].js',
    publicPath: '/admin',
  },
  plugins: [
    new MiniCssExtractPlugin({
      filename: '[name].[contenthash].css',
    }),
    new HtmlWebpackPlugin({
      template: './resources/index.html',
      minify: prod && {
        collapseWhitespace: true,
        removeComments: true,
        removeRedundantAttributes: true,
        removeScriptTypeAttributes: true,
        removeStyleLinkTypeAttributes: true,
        useShortDoctype: true,
      },
    }),
  ],
  optimization: {
    minimizer: [new TerserJSPlugin({}), new OptimizeCSSAssetsPlugin({})],
  },
  resolve: {
    alias: {
      svelte: path.resolve('node_modules', 'svelte'),
    },
    extensions: ['.mjs', '.js', '.svelte'],
    mainFields: ['svelte', 'browser', 'module', 'main'],
  },
  devServer: {
    contentBase: path.resolve(__dirname, 'public'),
    port: 3001,
  },
  module: {
    rules: [
      {
        test: /\.svelte$/,
        use: {
          loader: 'svelte-loader',
          options: {
            emitCss: true,
            hotReload: true,
          },
        },
      },
      {
        test: /\.css$/,
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
            options: {
              hmr: mode === 'development',
            },
          },
          'css-loader',
        ],
      },
    ],
  },
};