Frontend has very few to do with HTML and CSS nowadays. It all has to do with framework choice, the build toolchain, the unit-testing of the front, the server-

Frontend has very few to do with HTML and CSS nowadays. It all has to do with framework choice, the build toolchain, the unit-testing of the front, the server-side rendering vs the client-side, the architectural layers (or bricks) to use on the client-side, SEO, performance, CI/CD, browser compatibility, components lifecycle (yumm, library versions upgrade!).