Another excellent resource in the same vein is the marvelous https://javascript.info/

As a front-end dev who actually like the fundamental platform and the capacities it offers, I'm both happy to see so much nice things coming our way (nested CSS, container queries, and a generally nicer JS experience since ES6) and at the same time horrified by the amount of people using components for trivial things like buttons or bold text.

And I do like framework, but so much framework and library's marketing depend on making people believe that CSS and vanilla DOM manipulation is insanely hard (it's not once you know the fundamentals), and that pulling a random package on NPM is not just quick and easy, but also the professional thing to do.