webpack.config.js

const MiniCssExtractPlugin = require('mini-css-extract-plugin')
const path = require('path')

const { preprocess } = require('./svelte.config')

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

module.exports = {
  entry: {
    bundle: ['./src/main.ts'],
  },
  resolve: {
    alias: {
      svelte: path.resolve('node_modules', 'svelte'),
    },
    extensions: ['.ts', '.mjs', '.js', '.svelte'],
    mainFields: ['svelte', 'browser', 'module', 'main'],
  },
  output: {
    path: __dirname + '/public',
    filename: '[name].js',
    chunkFilename: '[name].[id].js',
  },
  module: {
    rules: [
      {
        test: /\.ts$/,
        use: {
          loader: 'ts-loader',
        },
      },
      {
        test: /\.svelte$/,
        use: {
          loader: 'svelte-loader',
          options: {
            emitCss: true,
            hotReload: true,
            preprocess,
          },
        },
      },
      {
        test: /\.p?css$/,
        use: [
          /**
           * MiniCssExtractPlugin doesn't support HMR.
           * For developing, use 'style-loader' instead.
           * */
          prod ? MiniCssExtractPlugin.loader : 'style-loader',
          {
            loader: 'css-loader',
            options: {
              importLoaders: 1,
            },
          },
        ],
      },
    ],
  },
  mode,
  plugins: [
    new MiniCssExtractPlugin({
      filename: '[name].css',
    }),
  ],
  devtool: prod ? false : 'source-map',
  devServer: {
    historyApiFallback: true,
  },
}