[z3t4]

Web development, even single page apps, and progressive web apps, can be simple if you skip the web frameworks which solve non-problems and complicate things. The most difficult problem in web development is to make the user interface (UX) work on everything from smart-watches to 40 inch 4k monitors. CSS solves this problem, but it's not an easy problem by itself. The second most difficult thing in web development is automated testing across the stack, testing both back-end and front-end, with different user devices. It's complicated and time consuming to write the code that test every function automatically. Third most difficult thing in web development is optimizations, the browser dev tools doesn't say much about what is going on internally in the JavaScript engine.

[pseudalopex]

Show me a user interface that works on anything from smart watches to 40 inch monitors.

[einpoklum]

> CSS solves this problem

No, it does not.

CSS allows some mitigation of this problem.