Awesome JavaScript Lightweight Table of Content Navigation Example – ScrollSpy.js
Simple, pure and lightweight Javascript library for detecting elements enter/exit into viewport
Awesome JavaScript Animate Scroll View Example – AOS
AOS is a javascript animate on scroll library, it can animate elements as they enter/leave a viewport.
Awesome JavaScript Animated Elements as They Scroll into View Example – ScrollReveal
ScrollReveal is a JavaScript library for easily animating elements as they enter/leave the viewport.
Awesome Android Scrollable View Example – Android-ObservableScrollView
Android-ObservableScrollView is an Android library to observe scroll events on scrollable views.