# fgnass/spin.js

A spinning activity indicator

Repository: https://github.com/fgnass/spin.js
Canonical: https://ross.abutalabs.com/products/spinjs
Homepage: http://spin.js.org
Language: CSS
License: MIT
License Family: permissive
Last push: 2024-07-19T20:53:58+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 5496, "days_push": 775, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 9245, forks 1003 (observed 2026-08-28T04:10:29.051081+00:00)

## What it is
spin.js is a dependency-free JavaScript/CSS library that dynamically creates animated spinning activity indicators as a resolution-independent replacement for loading GIFs. It is highly configurable, uses CSS keyframe animations, and ships as a native ES6 module with TypeScript definitions.

## Use cases
- show a loading spinner while fetching data
- replace animated loading GIFs with resolution-independent indicators
- add a customizable activity indicator to a web app
- display a spinner during long-running frontend operations
- create CSS-based loading animations without images

## When to choose
- you need a lightweight, zero-dependency loading spinner for the browser
- you want a resolution-independent alternative to loading GIFs
- you need broad browser compatibility with configurable spinner options

## When to avoid
- your framework already provides built-in loading/spinner components
- you need complex animated illustrations rather than a simple spinner
- you are building a non-web platform like native mobile or desktop

## Facets
- artifact type: library
- maturity: maintenance
- function: ui-components, animation, frontend-framework
- domain: frontend, web-development
- platform: browser, cross-platform
- tags: loading-spinner, css-animations, activity-indicator, zero-dependency, typescript-definitions, nodejs

## Member repositories
- fgnass/spin.js (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:10:29.051081+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 2026-08-29T17:23:14.219991+00:00, confidence not recorded.
  - readme: https://github.com/fgnass/spin.js (fetched 2026-08-28T04:10:29.051081+00:00, sha 2126bfde9755)
  - homepage: http://spin.js.org (fetched 2026-08-29T08:22:56.115186+00:00, sha 6c4eebfbd44d)
- Data as of 2026-08-30T08:39:29.467469+00:00.