webpack.config.js

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

module.exports = {
  entry: "./src/frontend/index.js",
  output: {
    filename: "main.js",
    path: path.resolve(__dirname, "dist"),
  },
  node: {
    // Need this when working with express, otherwise the build fails
    __dirname: false, // if you don't put this is, __dirname
    __filename: false, // and __filename return blank or /
  },
  module: {
    rules: [
      {
        test: /\.m?js$/,
        exclude: /node_modules/,
        use: {
          loader: "babel-loader",
          options: {
            presets: [["@babel/preset-env", { targets: "defaults" }]],
            plugins: ["@babel/plugin-transform-async-to-generator"],
          },
        },
      },
      {
        // Loads the javacript into html template provided.
        // Entry point is set below in HtmlWebPackPlugin in Plugins
        test: /\.html$/,
        loader: "html-loader",
      },
      {
        test: /\.css$/i,
        use: [MiniCssExtractPlugin.loader, "css-loader"],
      },
    ],
  },
  plugins: [
    new HtmlWebPackPlugin({
      template: "src/frontend/index.html",
      showErrors: true,
    }),
    new MiniCssExtractPlugin(),
  ],
};