# ChrisCavs/rallax.js

Dead simple parallax scrolling.

Repository: https://github.com/ChrisCavs/rallax.js
Canonical: https://ross.abutalabs.com/products/rallaxjs
Homepage: https://chriscavs.github.io/rallax-demo/
Language: JavaScript
License: MIT
License Family: permissive
Topics: parallax-scrolling, parallax, vanilla-javascript, vanilla-js
Last push: 2019-06-12T17:26:08+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": 2831, "days_push": 2639, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1465, forks 48 (observed 2026-08-28T04:04:48.295338+00:00)

## What it is
Rallax.js is a dependency-free vanilla JavaScript library for adding parallax scrolling effects to HTML elements. It offers a simple API with speed control, start/stop toggling, conditional callbacks, and mobile width handling.

## Use cases
- add parallax scrolling to a hero image
- create parallax effects without jQuery
- disable parallax on mobile screen widths
- change parallax speed dynamically while scrolling
- stop and start parallax based on scroll position

## When to choose
- you want lightweight parallax with no dependencies
- you need programmatic control over parallax speed and state
- you want conditional parallax behavior via callbacks

## When to avoid
- you need complex multi-layer scroll animation libraries
- you need a maintained project with recent updates
- you want scroll effects beyond parallax

## Facets
- artifact type: library
- maturity: maintenance
- function: animation
- domain: web-development, frontend
- platform: browser
- tags: parallax-scrolling, vanilla-js, no-dependencies, scroll-effects, nodejs

## Member repositories
- ChrisCavs/rallax.js (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:48.295338+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 2026-08-30T04:35:04.606182+00:00, confidence not recorded.
  - readme: https://github.com/ChrisCavs/rallax.js (fetched 2026-08-28T04:04:48.295338+00:00, sha 3650d212dceb)
  - homepage: https://chriscavs.github.io/rallax-demo/ (fetched 2026-08-29T11:43:38.067161+00:00, sha 97ac6bd51cb3)
  - registry_npm: https://registry.npmjs.org/rallax.js (fetched 2026-08-29T11:43:38.069667+00:00, sha d8bbc5222fb8)
- Data as of 2026-08-30T08:39:29.467469+00:00.