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)$/i,
        loader: 'ts-loader',
        exclude: ['/node_modules/'],
      },
      {
        test: /\.(css|scss|sass)$/,
        use: [
          stylesHandler,
          {
            loader: 'css-loader',
            options: {
              modules: {
                localIdentName: '[local]',
              },
            },
          },
          'sass-loader',
        ],
      },
      {
        test: /\.(eot|ttf|woff|woff2|png|jpg|gif)$/i,
        type: 'asset',
      },
      {
        test: /\.svg(\?v=\d+\.\d+\.\d+)?$/,
        use: ['@svgr/webpack'],
      },
    ],
  },
  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;
};