webpack.dev.config.js

const path = require('path');
const webpack = require('webpack');
const HtmlWebPackPlugin = require('html-webpack-plugin');

module.exports = {
  entry: {
    main: ['webpack-hot-middleware/client?path=/__webpack_hmr&timeout=20000', './src/index.jsx'],
  },
  output: {
    path: path.join(__dirname, 'dist'),
    publicPath: '/',
    filename: '[name].js',
  },
  mode: 'development',
  target: 'web',
  devtool: 'source-map',
  module: {
    rules: [
      {
        test: /\.jsx$/,
        exclude: /node_modules/,
        loader: 'babel-loader',
      },
      {
        test: /\.html$/,
        use: [
          {
            loader: 'html-loader',
          },
        ],
      },
      {
        test: /\.scss$/,
        use: ['style-loader', 'css-loader', 'sass-loader'],
      },
      {
        test: /\.(png|svg|jpg|gif)$/,
        use: ['file-loader'],
      },
    ],
  },
  resolve: {
    extensions: ['.js', '.jsx'],
  },
  plugins: [
    new HtmlWebPackPlugin({
      template: './src/html/index.html',
      filename: './index.html',
      excludeChunks: ['server'],
    }),
    new webpack.HotModuleReplacementPlugin(),
    new webpack.NoEmitOnErrorsPlugin(),
  ],
};