Microfrontend Fundamentals is a short, code-first introduction to the core ideas behind microfrontends, taught through single-spa — the framework created by Joel Denning, who has since helped dozens of companies put microfrontends into production.
Working through a set of introductory code examples, you'll see how single-spa splits a frontend into independently deployable pieces and orchestrates them together at runtime. It's a practical starting point before tackling a full microfrontend migration of your own.
Companion code is available on GitHub for following along.