I’m doing it on my personal site, tyleo.com. This question comes up enough that I’m writing a guide on it now. I don’t use any CSS framework except CSS module

I’m doing it on my personal site, tyleo.com. This question comes up enough that I’m writing a guide on it now. I don’t use any CSS framework except CSS modules. I was going to write the guide without module support and add a section about it near the bottom. There’s some really simple patterns you can follow with built-in JS features to make this easier.