I was working on another project, my icon library, and I started to convert it to something that uses my library, and it had ALL KINDS of problems when it came to querying on an svg element. Turns out I had to solve lots of problems, and I had to solve a number of them, and I had to set up an ampps server to get everything working right, and it was just a whole thing.
But I think I fixed a number of necessary issues with my library, and it's never felt better. Not just its use, but also my whole work process got streamlined a bit, and it felt really good.
... Maybe I'll update my website one of these days.