Portio Hugo is a simple, minimal and responsive Portfolio Hugo Theme. Portio Hugo is well organized, well-formatted, and named accordingly so it’s easy to change any and all of the design. Portio is built with Bootstrap 4. You can customize it very easily to fit your needs.
The idea is to show a back to top button only after scrolling with CSS.
This article shows some methods that only use CSS, no JS.
I especially like this method with a fading button.
What do you guys think?