Detection of elements in viewport & smooth scrolling with parallax effects.

Locomotive Scroll @ GitHub.

Stunning touch-friendly 3D parallax hover effects.
Atropos is a lightweight, free and open-source JavaScript library to create stunning touch-friendly 3D parallax hover effects.
Available for JavaScript, React, Vue.js and Svelte.
Atropos @ GitHub.

simpleParallax.js is a very simple and tiny Vanilla JS library that adds parallax animations on any images.

lightweight parallax effect without dependencies.

Parallax Engine that reacts to the orientation of a smart device. Where no gyroscope or motion detection hardware is available, the position of the cursor is used instead.