ScrollMagic VS Rellax.js

Several libraries and frameworks can help with this task, such as ScrollTrigger, ScrollMagic, Framer Motion, and the good ol’ Intersection Observer API. These tools provide more options and flexibility to create complex and interactive scroll-driven animations with ease. - Source: dev.to / 5 months ago

By checking their source code, it looks like they're using DrawSvgPlugin for the SVG animations and ScrollMagic for the animations when scrolling. I'd start by checking these two libraries. Source: 10 months ago

One library is called https://scrollmagic.io/ but you'll find plenty of tutorials and videos that implement this kind of scrolling. Source: about 1 year ago

ScrollMagic (there's a scrollMagic port for react too). These libraries take advantage of the intersection observer API (a standard built-in js web api). You may also be interested in the scroll event. Source: over 1 year ago

I haven't seen any themes that look like this sadly, but I've done similar stuff using https://scrollmagic.io/. Source: over 1 year ago

If you want something lightweight but at the expense of strict accuracy, I like the flexibility of Rellax. Source: over 1 year ago

Relax (for parallax scrolling speed of elements). Source: over 2 years ago

Scroll-based interaction or animations have been popular for quite a while now. But most of the libraries I find either disable the browser scrollbar completely and implement their own scrolling based on css transforms (like locomotive-scoll) or dont touch the native browser scroll at all (like rellax or lax.js). Source: almost 3 years ago

I'm on mobile so I can't see the source but I'm pretty sure it's just parallax, you can just use something like https://dixonandmoe.com/rellax/ to make something very similar. Source: almost 3 years ago