webpack.config.js

const path = require("path");

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

const isDevelopment = process.env.NODE_ENV === "development";
const isProduction = process.env.NODE_ENV === "production";
if (!isDevelopment && !isProduction) throw new Error("Unexpected NODE_ENV");

module.exports = {
  devtool: isDevelopment ? "inline-source-map" : undefined,
  devServer: {
    disableHostCheck: true,
  },
  entry: "./src/index.ts",
  mode: isDevelopment ? "development" : "production",
  module: {
    rules: [
      {
        test: /\.tsx?$/,
        loader: "ts-loader",
        exclude: /node_modules/,
        options: {
          transpileOnly: true,
        },
      },
    ],
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: "src/index.html",
    }),
  ],
  resolve: {
    extensions: [".tsx", ".ts", ".js"],
  },
  output: {
    filename: "index.js",
    path: path.resolve(__dirname, "dist"),
  },
};