# polyfills-db

> browser feature database

Latest version **3.0.0** (published 2014-12-21) · MIT license · 0 weekly downloads

## Install

```sh
npm install polyfills-db
pnpm add polyfills-db
yarn add polyfills-db
bun add polyfills-db
```

## Health

**Score 15/100 (F)** — status: abandoned.

Positive: no vulnerabilities.

Warnings: low downloads; no types; no esm support.

Negative: abandoned; low maintenance score.

## Facts

| | |
|---|---|
| Version | 3.0.0 |
| Published | 2014-12-21 |
| First published | 2014-07-29 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | none |
| Module format | CommonJS |
| Dependencies | 5 |
| Known vulnerabilities | 0 (+2 in 2 direct dependencies) |
| Install scripts | no |
| GitHub stars | 24 |
| Author | Jonathan Ong |
| Maintainers | jongleberry, swatinem |
| Keywords | database, db, polyfills, features, detects |

## Links

- npm: https://www.npmjs.com/package/polyfills-db
- Repository: https://github.com/polyfills/db
- Issues: https://github.com/polyfills/db/issues
- npm.io page: https://npm.io/package/polyfills-db

## Dependencies (5)

- [debug](https://npm.io/package/debug.md) *
- [semver](https://npm.io/package/semver.md) 4
- [memorizer](https://npm.io/package/memorizer.md) 1
- [useragent](https://npm.io/package/useragent.md) 2
- [caniuse-db](https://npm.io/package/caniuse-db.md) 1

## Alternatives

- [angular-pipes](https://npm.io/package/angular-pipes.md) — 5.6K weekly downloads
- [@ng-web-apis/midi](https://npm.io/package/@ng-web-apis/midi.md) — 2.6K weekly downloads
- [happn-3](https://npm.io/package/happn-3.md) — 1.6K weekly downloads
- [@opensip-cli/lang-go](https://npm.io/package/@opensip-cli/lang-go.md) — 1.2K weekly downloads
- [mongoose-typescript](https://npm.io/package/mongoose-typescript.md) — 85 weekly downloads

## Recent versions

- 3.0.0 (latest) — 2014-12-21
- 2.0.0 — 2014-12-21
- 1.19.2 — 2014-12-05
- 1.19.1 — 2014-12-01
- 1.19.0 — 2014-12-01
- 1.18.1 — 2014-12-01
- 1.18.0 — 2014-12-01
- 1.17.0 — 2014-12-01
- 1.16.1 — 2014-11-29
- 1.16.0 — 2014-11-29
- 1.15.0 — 2014-11-28
- 1.14.3 — 2014-10-28
- 1.14.2 — 2014-10-28
- 1.14.1 — 2014-10-27
- 1.14.0 — 2014-10-20
- … 38 more at https://npm.io/package/polyfills-db/versions

## README

# polyfills db

[![NPM version][npm-image]][npm-url]
[![Build status][travis-image]][travis-url]
[![Test coverage][coveralls-image]][coveralls-url]
[![Dependency Status][david-image]][david-url]
[![License][license-image]][license-url]
[![Downloads][downloads-image]][downloads-url]
[![Gittip][gittip-image]][gittip-url]


A database for various polyfills that includes:

- Which browsers support a feature
- Associated modules or files for each feature

Types of polyfills:

- polyfills - runtime JS polyfills for [polyfills](http://github.com/polyfills/polyfills)
- recast - JS transpilation using [recast](https://github.com/benjamn/recast) and [ecstacy](https://github.com/polyfills/ecstacy)
- postcss - CSS transpilation using [postcss](https://github.com/postcss/postcss) and [ecstacy](https://github.com/polyfills/ecstacy)

## Testing on Browsers

Of course, we want to actually test each bundle on a browser.
Right now, tests are in [paas](https://github.com/polyfills/paas),
so everytime you add a polyfill, checkout [paas](https://github.com/polyfills/paas)
and see if hitting `GET /test.html` works in all your browsers.
CI testing is coming!

## Help Maintaining

Most updates are currently done manually.
Please help add polyfills and update the relevant versions.
Some helpful resources are:

- [HTML5 Cross Browser Polyfills](https://github.com/Modernizr/Modernizr/wiki/HTML5-Cross-browser-Polyfills)
- [caniuse](http://caniuse.com)
- [MDN](https://developer.mozilla.org/en-US/)
- [ES Compatibility Table](http://kangax.github.io/compat-table/es6/)
- [esnext](https://github.com/esnext/esnext) and its [organization](https://github.com/esnext)
- [cssnext](https://github.com/cssnext/cssnext) and the [postcss organization](https://github.com/postcss)

## Notes

`regenerator` includes `es7-async-fn`. If you use `regenerator`,
be sure to not use `es7-async-fn`, or at least the runtime.

[npm-image]: https://img.shields.io/npm/v/polyfills-db.svg?style=flat-square
[npm-url]: https://npmjs.org/package/polyfills-db
[github-tag]: http://img.shields.io/github/tag/polyfills/db.svg?style=flat-square
[github-url]: https://github.com/polyfills/db/tags
[travis-image]: https://img.shields.io/travis/polyfills/db.svg?style=flat-square
[travis-url]: https://travis-ci.org/polyfills/db
[coveralls-image]: https://img.shields.io/coveralls/polyfills/db.svg?style=flat-square
[coveralls-url]: https://coveralls.io/r/polyfills/db?branch=master
[david-image]: http://img.shields.io/david/polyfills/db.svg?style=flat-square
[david-url]: https://david-dm.org/polyfills/db
[license-image]: http://img.shields.io/npm/l/polyfills-db.svg?style=flat-square
[license-url]: LICENSE
[downloads-image]: http://img.shields.io/npm/dm/polyfills-db.svg?style=flat-square
[downloads-url]: https://npmjs.org/package/polyfills-db
[gittip-image]: https://img.shields.io/gittip/jonathanong.svg?style=flat-square
[gittip-url]: https://www.gittip.com/jonathanong/

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_Source: https://npm.io/package/polyfills-db · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._