The video I’m not sure how much longer I can wait! by Kevin Powell is an excellent introduction to sub-grids in CSS. But I was more interested in the fact that he told his viewers that,
“you can use numbers in classes, but if you have a class or id that starts with a number, it’s invalid. […] It’s one of those weird things in CSS that sometimes trips people up.”
I immediately thought to myself, “it’s not weird. Every programming language is like that.”
Then, I thought, “I bet this guy only knows CSS, so he... [More]