You’ve got a web app. Maybe it’s new, sexy, and built with ng-cli or create-react-app, but more than likely it’s a little bit ugly and includes a variety of legacy components. Underneath the hood it most likely uses webpack to build your code into bundles. When it’s time for your app to load, how does this code get loaded? What about code-splits, how are those dynamically injected into the browser? Let’s dig deep, explore the history of JavaScript, and learn about the future of modules on the web.