webpack.config.js

const path = require('path');

const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const sveltePreprocess = require('svelte-preprocess');

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

module.exports = {
  entry: {
    'build/bundle': ['./client/main.ts'],
  },
  resolve: {
    modules: [path.resolve('node_modules'), path.resolve('client')],
    alias: {
      svelte: path.dirname(require.resolve('svelte/package.json')),
    },
    extensions: ['.mjs', '.js', '.ts', '.svelte'],
    mainFields: ['svelte', 'browser', 'module', 'main'],
  },
  watch: true,
  cache: { type: 'memory' },
  output: {
    path: path.join(__dirname, '/public'),
    filename: '[name].js',
    chunkFilename: '[name].[id].js',
  },
  module: {
    rules: [
      {
        test: /(\.tsx|\.ts)$/,
        use: [
          { loader: 'cache-loader' },
          {
            loader: 'thread-loader',
            options: {
              // there should be 1 cpu for the fork-ts-checker-webpack-plugin
              workers: require('os').cpus().length - 1,
            },
          },
          {
            loader: 'ts-loader',
            options: {
              happyPackMode: true, // IMPORTANT! use happyPackMode mode to speed-up compilation and reduce errors reported to webpack
            },
          },
        ],
        exclude: /(node_modules|bower_components)/,
      },
      {
        test: /\.svelte$/,
        use: {
          loader: 'svelte-loader',
          options: {
            compilerOptions: {
              dev: !prod,
            },
            emitCss: prod,
            hotReload: !prod,
            preprocess: sveltePreprocess({ sourceMap: !prod }),
          },
        },
      },
      {
        test: /\.css$/,
        use: [MiniCssExtractPlugin.loader, 'css-loader'],
      },
      {
        // required to prevent errors from Svelte on Webpack 5+
        test: /node_modules\/svelte\/.*\.mjs$/,
        resolve: {
          fullySpecified: false,
        },
      },
      {
        test: /\.(mp3|ogg|wav|png|svg|jpg|jpeg|gif)$/i,
        type: 'asset/resource',
      },
      {
        test: /\.(woff|woff2|ttf)$/,
        use: {
          loader: 'url-loader',
        },
      },
      // Shaders
      {
        test: /\.(glsl|vs|fs|vert|frag)$/,
        exclude: /node_modules/,
        use: ['raw-loader'],
      },
    ],
  },
  mode,
  plugins: [
    new MiniCssExtractPlugin({
      filename: '[name].css',
    }),
  ],
  devtool: prod ? false : 'source-map',
  stats: {
    assets: false,
    entrypoints: false,
    modules: false,
  },
};