webpack.config.js

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CleanWebpackPlugin = require('clean-webpack-plugin');
const webpack = require('webpack');

module.exports = {
  entry: {
    app: './src/index.tsx'
  },
  mode: 'development',
  devtool: 'inline-source-map',
  devServer: {
    contentBase: './dist',
    hot: true
  },
  resolve: {
    modules: ['node_modules'],
    extensions: ['.js', '.jsx', '.ts', '.tsx'],
    mainFields: ['webpack', 'browser', 'main']
  },
  plugins: [
    new CleanWebpackPlugin(),
    new HtmlWebpackPlugin({
      title: 'Hot Module Replacement',
      template: 'index.html'
    }),
    new webpack.HotModuleReplacementPlugin()
  ],
  output: {
    filename: '[name].js',
    path: path.resolve(__dirname, 'dist')
  },
  watchOptions: {
    ignored: /node_modules\/(?!@samoyed)/
  },
  module: {
    rules: [
      {
        test: /\.scss$/,
        use: [
          {
            loader: 'style-loader',
            options: {
              sourceMap: true
            }
          },
          {
            loader: 'css-loader',
            options: {
              url: false,
              sourceMap: true
            }
          },
          {
            loader: 'sass-loader',
            options: {
              sourceMap: true
            }
          }
        ]
      },
      {
        test: /\.[tj]sx?$/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: [
              '@babel/preset-typescript',
              '@babel/preset-react',
              ['@babel/preset-env', {
                targets: { ie: '11' }
              }]
            ],
            plugins: [
              '@babel/plugin-proposal-class-properties'
            ]
          }
        }
      }
    ]
  }
};