# eligrey/classList.js

Cross-browser element.classList

Repository: https://github.com/eligrey/classList.js
Canonical: https://ross.abutalabs.com/products/classlistjs
Language: JavaScript
License: Unlicense
License Family: permissive
Last push: 2018-10-18T21:13:12+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": 5804, "days_push": 2876, "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 1103, forks 226 (observed 2026-08-28T04:03:36.001828+00:00)

## What it is
A cross-browser JavaScript polyfill that fully implements the element.classList DOM API. It enables classList support in browsers that lack it, working everywhere except IE 7 and earlier.

## Use cases
- add classList support to legacy browsers
- polyfill element.classList in old Internet Explorer
- use classList API consistently across browsers
- manipulate CSS classes via DOM in older browsers
- shim classList for IE 8-9 compatibility

## When to choose
- you must support legacy browsers like IE 8-11 that lack full classList support
- you want a tiny, dependency-free polyfill served from a CDN
- your codebase relies on classList but targets old browsers

## When to avoid
- you only target modern browsers that natively support classList
- you need a broader DOM polyfill suite rather than a single API shim
- you need IE 7 or earlier support

## Facets
- artifact type: library
- maturity: maintenance
- function: ui-components
- domain: web-development, frontend, browser-extensions
- platform: browser, cross-platform
- tags: polyfill, shim, dom, classlist, legacy-browser-support

## Member repositories
- eligrey/classList.js (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:36.001828+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 2026-08-30T06:45:32.196482+00:00, confidence not recorded.
  - readme: https://github.com/eligrey/classList.js (fetched 2026-08-28T04:03:36.001828+00:00, sha b1230f05a621)
  - registry_npm: https://registry.npmjs.org/classlist.js (fetched 2026-08-29T12:48:08.119163+00:00, sha 3b3c5bb3c466)
- Data as of 2026-08-30T08:39:29.467469+00:00.