webpack.dev.js

const path = require('path');
const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');

module.exports = {
  mode: 'development',

  entry: './src/index.tsx',

  devServer: {
    historyApiFallback: true,
    inline: true,
    port: 3000,
    hot: true,
    publicPath: '/',
  },

  module: {
    rules: [
      {
        test: /\.tsx?$/,
        use: ['babel-loader', 'ts-loader'],
      },
      {
        test: /\.(scss|css)$/,
        use: [MiniCssExtractPlugin.loader, 'css-loader', 'sass-loader'],
      },
    ],
  },

  resolve: {
    extensions: ['.js', '.jsx', '.ts', '.tsx'],
    alias: {
      pages: path.resolve('src/pages/'),
      components: path.resolve('src/components/'),
      actions: path.resolve('src/store/actions/'),
      reducers: path.resolve('src/store/reducers/'),
      util: path.resolve('src/util/'),
    },
  },

  plugins: [
    new webpack.HotModuleReplacementPlugin(),
    new MiniCssExtractPlugin(),
    new HtmlWebpackPlugin({
      filename: 'index.html',
      template: 'public/index_dev.html',
    }),
  ],
};