LeaVerou/prefixfree
Break free from CSS prefix hell! observed · 2026-08-28
Health v2 · maintenance only
10/100
- Activity 0
- Release rhythm 35
- Longevity 100
Flags: no_releases archived
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 5440
- days_rel: n/a
- days_push: 1785
- n_releases_24m: 0
Adoption not part of the score
3785 stars · 698 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
-prefix-free is a small (2KB gzipped) JavaScript library that lets developers write unprefixed CSS3 properties and automatically adds the current browser's vendor prefix at runtime, only when needed. It processes stylesheets, style elements, and style attributes behind the scenes and exposes StyleFix and PrefixFree APIs for plugin authors.
Use cases
- write unprefixed CSS3 properties without vendor prefixes
- automatically add -webkit- or -moz- prefixes at runtime
- support legacy browsers needing vendor prefixes for CSS3 features
- process inline style attributes for prefixing
- build custom CSS fixers with the StyleFix framework
When to choose
- maintaining legacy sites targeting older browsers (IE9+, Firefox 3.5+) that require vendor prefixes
- you want to author clean, unprefixed CSS without a build step
When to avoid
- modern projects targeting evergreen browsers where vendor prefixes are largely obsolete
- you prefer build-time autoprefixing tools like Autoprefixer over runtime processing
- you rely on @import-ed or cross-origin stylesheets, which are unsupported
Facets
library · maturity maintenance
css-framework developer-tools web-development frontend browser css-vendor-prefixes browser-compatibility runtime-css-processing javascript web-server
3 sources
- readme: https://github.com/LeaVerou/prefixfree · fetched 2026-08-28 · 51e22a09d90e
- homepage: http://projects.verou.me/prefixfree/ · fetched 2026-08-29 · 3adfc9c8a339
- registry_npm: https://registry.npmjs.org/prefixfree · fetched 2026-08-29 · 1368ea451222
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| LeaVerou/prefixfree | main | 10 |
For agents
markdown · JSON · MCP: product_card(name="LeaVerou/prefixfree")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem