# Schepp/box-sizing-polyfill

A CSS box-sizing: border-box polyfill for IE 6/7

Repository: https://github.com/Schepp/box-sizing-polyfill
Canonical: https://ross.abutalabs.com/products/box-sizing-polyfill
License Family: other
Last push: 2015-11-30T10:51:27+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": 5368, "days_push": 3929, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1164, forks 182 (observed 2026-08-28T04:03:49.833851+00:00)

## What it is
A CSS polyfill that adds box-sizing: border-box support to Internet Explorer 6 and 7 via an HTC behavior file. It feature-detects native box-sizing support and does nothing in browsers that already implement it.

## Use cases
- make box-sizing border-box work in IE6 and IE7
- support legacy Internet Explorer layouts with border-box sizing
- polyfill CSS box-sizing for old browsers
- fix width calculations in IE6/7 when using border-box
- gracefully skip polyfill in browsers with native box-sizing support

## When to choose
- you must support IE6 or IE7 with modern CSS box-sizing behavior
- maintaining a legacy codebase that still targets old Internet Explorer

## When to avoid
- you only need to support IE8 or newer browsers
- building any modern web project without legacy IE requirements

## Facets
- artifact type: library
- maturity: abandoned
- function: ui-components, developer-tools
- domain: web-development, frontend
- platform: browser
- tags: css-polyfill, internet-explorer, htc, box-sizing, legacy-browsers

## Member repositories
- Schepp/box-sizing-polyfill (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:49.833851+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 2026-08-30T06:29:29.718440+00:00, confidence not recorded.
  - readme: https://github.com/Schepp/box-sizing-polyfill (fetched 2026-08-28T04:03:49.833851+00:00, sha 0d1f6318c8df)
- Data as of 2026-08-30T08:39:29.467469+00:00.