webpack.config.js

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const CopyPlugin = require("copy-webpack-plugin");
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const ESLintPlugin = require('eslint-webpack-plugin');
const { TsconfigPathsPlugin } = require('tsconfig-paths-webpack-plugin');

const isProduction = process.env.NODE_ENV === 'production';

const stylesHandler = isProduction
  ? MiniCssExtractPlugin.loader
  : 'style-loader';

const config = {
  entry: './src/index.tsx',
  output: {
    path: path.resolve(__dirname, 'dist'),
  },
  devServer: {
    open: true,
    host: 'localhost',
  },
  plugins: [
    new MiniCssExtractPlugin(
      {
        filename: '[name].css'
      }),
    new HtmlWebpackPlugin({
      template: './src/index.html',
    }),
    new CleanWebpackPlugin(),
    new CopyPlugin({
      patterns: [
        { from: "./src/assets", to: "assets", noErrorOnMissing: true },
      ],
    }),
    new ESLintPlugin({
      extensions: ['.tsx', '.ts', '.js'],
      exclude: 'node_modules'
    })
  ],
  module: {
    rules: [
      {
        test: /\.(ts|tsx)$/i,
        loader: 'ts-loader',
        exclude: ['/node_modules/'],
      },
      {
        test: /\.css$/i,
        use: [stylesHandler, 'css-loader'],
      },
      {
        test: /\.s[ac]ss$/i,
        use: [stylesHandler, 'css-loader', 'sass-loader'],
      },
      {
        test: /\.(eot|svg|ttf|woff|woff2|png|jpg|gif)$/i,
        type: 'asset',
      },
    ],
  },
  resolve: {
    extensions: ['.tsx', '.ts', '.jsx', '.js', '...'],
    plugins: [new TsconfigPathsPlugin()],
  },
};

module.exports = () => {
  if (isProduction) {
    config.mode = 'production';

    config.plugins.push(new MiniCssExtractPlugin());
  } else {
    config.mode = 'development';
  }
  return config;
};