janpaepke/ScrollMagic

Health v2 · maintenance only

Adoption not part of the score

14955 stars · 2115 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

ScrollMagic is a lightweight, zero-dependency JavaScript/TypeScript library for reacting to the user's scroll position, built as a convenience wrapper around IntersectionObserver and ResizeObserver. It provides scroll-position data, events, and progress values for building scroll-driven UX like parallax, pinning, class toggles, and lazy loading, while remaining framework-agnostic.

Use cases

• trigger animations based on scroll position
• pin elements while scrolling (sticky sections)
• toggle CSS classes when elements enter the viewport
• add parallax effects to a website
• build infinite scrolling pages with ajax content loading
• sync animation playback to scrollbar movement (scrub)
• fire callbacks at specific scroll positions with progress values

When to choose

• you need precise scroll-position events and progress data without a full animation library
• you want a tiny (~6KB), zero-dependency, framework-agnostic scroll foundation
• you need cross-browser scroll-driven behavior including custom scroll containers and horizontal scrolling
• you want to combine scroll tracking with GSAP, CSS, or your own animation code

When to avoid

• you want a ready-made scroll animation solution out of the box (use GSAP ScrollTrigger or Motion)
• you only need pure CSS scroll-driven animations and can accept limited browser support
• you need deep scroll-linked animation timelines rather than scroll state and events

Facets

library · maturity active

animation state-management plugin-system middleware web-development frontend web-design browser cross-platform scroll-interactions scroll-animations parallax sticky-elements intersectionobserver typescript zero-dependency scroll-trigger nodejs

Member repositories

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