webpack.config.js

const path = require("path");
const HtmlWebpackPlugin = require("html-webpack-plugin");
const Dotenv = require("dotenv-webpack");

module.exports = {
  // webpack will take the files from ./src/index
  entry: ["@babel/polyfill", "./src/index"],

  // and output it into /dist as bundle.js
  output: {
    path: path.join(__dirname, "/dist"),
    filename: "bundle.js",
  },

  // adding .ts and .tsx to resolve.extensions will help babel look for .ts and .tsx files to transpile
  resolve: {
    extensions: [".ts", ".tsx", ".js", ".jsx"],
  },

  module: {
    rules: [
      // we use babel-loader to load our jsx and tsx files
      {
        test: /\.(ts|js)x?$/,
        exclude: /node_modules/,
        use: {
          loader: "babel-loader",
        },
      },

      // css-loader to bundle all the css files into one file and style-loader to add all the styles  inside the style tag of the document
      {
        test: /\.s?(c|a)ss$/,
        use: ["style-loader", "css-loader"],
      },
    ],
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: "./public/index.html",
    }),
    new Dotenv(),
  ],
};