A little bit of plain Javascript can do a lot

I’ve never worked as a professional frontend developer, so even though I’ve been writing HTML/CSS/JS for 15 years for little side projects, all of the projects have been pretty small, sometimes I don’t write any Javascript for years in between, and I often don’t quite feel like I know what I’m doing.
Partly because of that, I’ve leaned on libraries a lot! Ten years ago I used to use jQuery, and since maybe 2017 I’ve been using a lot of vue.js for my little Javascript projects (you can see a l...