# filamentgroup/Responsive-Images

NOTE: use Picturefill instead. An Experiment with Mobile-First Images that Scale Responsively & Responsibly

Repository: https://github.com/filamentgroup/Responsive-Images
Canonical: https://ross.abutalabs.com/products/responsive-images
Homepage: https://github.com/scottjehl/picturefill
Language: JavaScript
License Family: other
Archived: true
Last push: 2022-10-20T20:51:25+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 5742, "days_push": 1413, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, archived, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1361, forks 167 (observed 2026-08-28T04:04:29.964229+00:00)

## What it is
An archived JavaScript experiment from Filament Group for delivering mobile-first responsive images that scale to larger sizes based on screen width, using an .htaccess rewrite trick and a ?full= query parameter. The project is no longer maintained and recommends using Picturefill or native responsive image features instead.

## Use cases
- serve smaller images to mobile devices and larger ones to desktops
- avoid downloading both image sizes in responsive layouts
- implement mobile-first responsive images without UA sniffing
- study historical responsive image techniques

## When to choose
- you need to maintain a legacy site already using this technique
- you are researching the history of responsive image solutions

## When to avoid
- starting any new project - it is archived and unmaintained
- modern browsers - use native srcset/sizes or the picture element
- you need support or updates

## Facets
- artifact type: library
- maturity: abandoned
- function: image-processing, developer-tools
- domain: web-development, frontend
- platform: browser
- tags: responsive-images, deprecated, archived, javascript, mobile-first, web-server

## Member repositories
- filamentgroup/Responsive-Images (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:29.964229+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 2026-08-30T04:41:34.890800+00:00, confidence not recorded.
  - readme: https://github.com/filamentgroup/Responsive-Images (fetched 2026-08-28T04:04:29.964229+00:00, sha 5975d64af767)
  - homepage: https://github.com/scottjehl/picturefill (fetched 2026-08-29T11:59:32.004610+00:00, sha 0d9fa18a69e5)
- Data as of 2026-08-30T08:39:29.467469+00:00.