# scroll-out/scroll-out

ScrollOut detects changes in scroll for reveal, parallax, and CSS Variable effects!

Repository: https://github.com/scroll-out/scroll-out
Canonical: https://ross.abutalabs.com/products/scroll-out
Homepage: https://scroll-out.github.io/
Language: TypeScript
License Family: other
Topics: scrolling, animation, css, javascript, scroll-events, transition, css-classes
Last push: 2024-01-14T16:21:12+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 3301, "days_push": 962, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1217, forks 122 (observed 2026-08-28T04:04:01.481758+00:00)

## What it is
ScrollOut is a tiny (~1KB gzipped) JavaScript library that detects scroll position changes and toggles data attributes, CSS classes, and CSS variables on elements as they enter or leave the viewport. It enables scroll-driven reveal, parallax, and sticky-header effects using CSS or JavaScript callbacks.

## Use cases
- animate elements as they scroll into view
- reveal content on scroll with css transitions
- create parallax scrolling effects
- build a sticky header that changes on scroll
- toggle css classes based on scroll visibility
- drive css variables from scroll progress

## When to choose
- you need a tiny dependency-free-feeling scroll animation library
- you prefer styling scroll effects in css rather than javascript
- you need broad browser support including ie11

## When to avoid
- you need advanced scroll-driven animation apis or physics-based effects
- you want a framework-integrated scroll animation solution with active development
- you need intersection observer features beyond simple in/out visibility

## Facets
- artifact type: library
- maturity: maintenance
- function: animation, ui-components
- domain: frontend, web-development, web-design
- platform: browser, cross-platform
- tags: scroll-events, scroll-reveal, parallax, css-variables, tiny-library, typescript

## Member repositories
- scroll-out/scroll-out (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:01.481758+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:17:09.096443+00:00, confidence not recorded.
  - readme: https://github.com/scroll-out/scroll-out (fetched 2026-08-28T04:04:01.481758+00:00, sha d0a744a4b3c7)
  - homepage: https://scroll-out.github.io/ (fetched 2026-08-29T12:24:55.399411+00:00, sha 81f72436d0b9)
- Data as of 2026-08-30T08:39:29.467469+00:00.