webpack.config.js

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

module.exports = {
  mode: "development",
  entry: "./src/index.js",
  output: {
    path: path.resolve(__dirname, "dist"),
  },
  devServer: {
    static: { directory: path.join(__dirname, "dist") },
    port: 9000,
    open: true,
  },
  module: {
    rules: [
      {
        test: /\.scss$/,
        use: [
          { loader: "style-loader" },
          {
            loader: MiniCssExtractPlugin.loader,
            options: {
              esModule: false,
            },
          },
          { loader: "css-loader" },
          { loader: "sass-loader" },
        ],
      },
      {
        test: /\.(js|jsx)$/,
        exclude: /(node_modules|bower_components)/,
        use: {
          loader: "babel-loader",
          options: {
            presets: ["@babel/preset-env", "@babel/preset-react"],
          },
        },
      },
      {
        test: /\.html$/i,
        loader: "html-loader",
      },
    ],
  },
  plugins: [
    new MiniCssExtractPlugin(),
    new HtmlWebpackPlugin({
      template: "./src/index.html",
    }),
  ],
  optimization: {
    splitChunks: {
      cacheGroups: {
        styles: {
          name: "styles",
          type: "css/mini-extract",
          chunks: "all",
          enforce: true,
        },
      },
    },
  },
};