Many many collections of codepens, e.g. 59 CSS Toggle Switches at https://freefrontend.com/css-toggle-switches/
Lots of designs to admire and use as inspiration
"Timetravel Design is a collection of beautiful designs ordered by month and year. After 5 years of curating designs for Pixels I figured this would be a fun project to share with you. Enjoy!"
"If you're looking for kick-ass designs and copywriting, you've come to the right place. I'll share a couple of designs here every day and I hope you'll enjoy it 🍿."