webpack.config.js

const webpack = require("webpack");
const path = require("path");
const HtmlWebpackPlugin = require("html-webpack-plugin");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const { CleanWebpackPlugin } = require("clean-webpack-plugin");

const config = {
  entry: ["@babel/polyfill", "react-hot-loader/patch", "./src/index.jsx"],
  output: {
    path: path.resolve(__dirname, "dist"),
    filename: "bundle.[hash].js",
  },
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        use: "babel-loader",
        exclude: /node_modules/,
      },
      {
        test: /\.scss$/,
        use: [MiniCssExtractPlugin.loader, "css-loader", "sass-loader"],
      },
      {
        test: /\.(png|jpe?g|gif)$/i,
        use: [
          {
            loader: "file-loader",
          },
        ],
      },
    ],
  },
  resolve: {
    extensions: [".js", ".jsx"],
    alias: {
      "react-dom": "@hot-loader/react-dom",
    },
  },
  plugins: [
    new HtmlWebpackPlugin({
      appMountId: "app",
      filename: "index.html",
      template: "./src/index.html",
    }),
    new MiniCssExtractPlugin(),
    new CleanWebpackPlugin(),
  ],
  devServer: {
    contentBase: "./dist",
    historyApiFallback: true,
  },
};

module.exports = config;