# jonathantneal/flexibility

A JavaScript polyfill for Flexbox

Repository: https://github.com/jonathantneal/flexibility
Canonical: https://ross.abutalabs.com/products/flexibility
Homepage: https://jonathantneal.github.io/flexibility/
Language: JavaScript
License: MIT
License Family: permissive
Last push: 2022-09-21T12:39:18+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": 3953, "days_push": 1442, "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 4288, forks 458 (observed 2026-08-28T04:08:41.362842+00:00)

## What it is
Flexibility is a JavaScript polyfill that implements the CSS Flexible Box Layout (Flexbox) in older browsers like Internet Explorer 8 and 9. It reads flexbox styles from the DOM and writes computed layout details back to elements, enabling flexible layouts on legacy browsers.

## Use cases
- support flexbox layouts in internet explorer 8 and 9
- polyfill display flex for legacy browsers
- make css flexbox work in old ie
- add flexbox support to a legacy web project
- emulate flexbox layout via javascript

## When to choose
- you must support Internet Explorer 8/9 or other browsers without native Flexbox
- you maintain a legacy web app that needs flexible layouts on old browsers

## When to avoid
- you only target modern browsers with native Flexbox support
- you need a maintained solution - the project is in maintenance mode and legacy IE usage is rare today

## Facets
- artifact type: library
- maturity: maintenance
- function: ui-components, frontend-framework
- domain: web-development, frontend, web-design
- platform: browser
- tags: flexbox, polyfill, internet-explorer, css-layout, legacy-browser-support, javascript

## Member repositories
- jonathantneal/flexibility (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:41.362842+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 2026-08-29T18:21:55.366206+00:00, confidence not recorded.
  - readme: https://github.com/jonathantneal/flexibility (fetched 2026-08-28T04:08:41.362842+00:00, sha 6ff087b17f49)
  - homepage: https://jonathantneal.github.io/flexibility/ (fetched 2026-08-29T09:11:29.439957+00:00, sha 6e059fe9525e)
  - registry_npm: https://registry.npmjs.org/flexibility (fetched 2026-08-29T09:11:29.449504+00:00, sha fa90bca56136)
- Data as of 2026-08-30T08:39:29.467469+00:00.