[bobthepanda]

The problem with webdev is that JS has a lot less "standard" than other languages like Java, so a lot of times people either reinvent the wheel or import some package to deal with things that would be standard in a language like Java, and they implement things their own way.

The other problem is that you're not really fighting JS or CSS or HTML per se, but a browser implementation of interpreters for that. And you don't really have a say in the matter, because you're not picking what browsers are using your webapp, your users are. This is only really solvable using a combination of MDN, Stack Overflow, and Google-fu.