webpack.config.js

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

const devMode = process.env.NODE_ENV !== "production";

module.exports = {
  entry: {
    bundle: "./src/index.js",
  },

  output: {
    filename: "bundle.js",
    path: path.resolve(__dirname, "dist"),
    clean: true,
  },

  devServer: {
    static: {
      directory: path.join(__dirname, "./"),
    },
    open: true,
    port: 3000,
    devMiddleware: {
      writeToDisk: true,
    },
  },

  module: {
    rules: [
      {
        test: /\.css$/i,
        use: [
          MiniCssExtractPlugin.loader,
          {
            loader: "css-loader",
            options: {
              importLoaders: 2,
            },
          },
          {
            loader: "postcss-loader",
            options: {
              postcssOptions: {
                plugins: [["postcss-preset-env"]],
              },
            },
          },
        ],
      },
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: [
          {
            loader: "babel-loader",
            options: {
              presets: ["@babel/preset-env"],
            },
          },
        ],
      },
    ],
  },
  plugins: [
    new MiniCssExtractPlugin({
      filename: "style.css"
    }),
    new HtmlWebpackPlugin({
      template: "src/index.html",
      favicon: "src/favicon.ico",
    })
  ],

  devtool: devMode ? "source-map" : "eval",
  watchOptions: {
    ignored: /node_modules/,
  },
};