# jgthms/css-reference

CSS Reference: a free visual guide to the most popular CSS properties

Repository: https://github.com/jgthms/css-reference
Canonical: https://ross.abutalabs.com/products/css-reference
Homepage: https://cssreference.io
Language: HTML
License: MIT
License Family: permissive
Topics: css, reference, jekyll-site
Last push: 2024-07-11T11:54:29+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 3571, "days_push": 783, "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 4901, forks 335 (observed 2026-08-28T04:09:02.109138+00:00)

## What it is
CSS Reference is a free visual guide to the most popular CSS properties, built as a Jekyll static site and published at cssreference.io. It explains properties like flexbox, grid, animations, backgrounds, and typography with illustrated and animated examples.

## Use cases
- learn CSS properties with visual examples
- look up how a CSS property like flex-grow or grid-auto-flow works
- find illustrated explanations of animations and transitions
- teach CSS to beginners with animated demos
- browse popular CSS properties by category like flexbox, grid, and typography

## When to choose
- you want a free, visual, example-driven CSS reference
- you learn better from animated illustrations than text specs
- you need a quick lookup for common CSS properties

## When to avoid
- you need exhaustive coverage of every CSS property or the latest specs
- you need an interactive playground to write and test code
- you need MDN-level technical detail on browser compatibility

## Facets
- artifact type: learning-resource
- maturity: maintenance
- function: documentation, developer-tools
- domain: web-development, frontend, web-design, education, documentation
- platform: cross-platform
- tags: css, reference-guide, jekyll, visual-examples, static-site, frontend-education, web-server

## Member repositories
- jgthms/css-reference (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:02.109138+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 2026-08-29T18:18:08.775672+00:00, confidence not recorded.
  - readme: https://github.com/jgthms/css-reference (fetched 2026-08-28T04:09:02.109138+00:00, sha b45a2359f622)
  - homepage: https://cssreference.io (fetched 2026-08-29T09:00:18.003561+00:00, sha c5083b116fae)
- Data as of 2026-08-30T08:39:29.467469+00:00.