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polyfillpolyfill/polyfill-service · source

Snapshot 0 · 2026-11-04T12:47:23Z · JavaScript · MIT

GitHub description at capture

Automatic polyfill service.

README at capture

<div align="center">
  <h1><a href="https://polyfill.io">Polyfill.io</a></h1>

  <a href="https://polyfill.io"><img height="100px" alt="logo" src="https://polyfill.io/img/logo.svg"/></a>
  
  <h3><em>Polyfill.io</em> is a service which makes web development less frustrating by selectively polyfill just what the browser needs. <em>Polyfill.io</em> reads the User-Agent header of each request and returns polyfill that are suitable for the requesting browser.</h3> 
<div>

  <a href="./LICENSE.md">
    <img src="https://img.shields.io/github/license/polyfillpolyfill/polyfill-service?logo=github" alt="License" />
  </a>
  <a href=".github/CONTRIBUTING.md">
    <img src="https://img.shields.io/badge/PRs-welcome-brightgreen.svg" alt="PRS Badge" />
  </a> 
  <a href="https://github.com/polyfillpolyfill/polyfill-service/releases">
    <img src="https://img.shields.io/github/v/release/polyfillpolyfill/polyfill-service?logo=github" alt="latest version" />
  </a>
  <a href="https://github.com/polyfillpolyfill/polyfill-service/releases">
    <img src="https://img.shields.io/github/downloads/polyfillpolyfill/polyfill-service/total?logo=github&color=239F7AEA" alt="Downloads" />
  </a>
  <a href="https://github.com/polyfillpolyfill/polyfill-service/releases">
    <img src="https://img.shields.io/github/discussions/polyfillpolyfill/polyfill-service?logo=github&color=23ED8936" alt="Discussions" />
  </a>
  <a href="https://github.com/polyfillpolyfill/polyfill-service/stargazers">
    <img src="https://img.shields.io/github/stars/polyfillpolyfill/polyfill-service?style=plastic&logo=github&color=%23FFAC2D" alt="Stars" />
  </a>
  <a href="https://github.com/polyfillpolyfill/polyfill-service/watchers">
    <img src="https://img.shields.io/github/watchers/polyfillpolyfill/polyfill-service?style=plastic&logo=github&color=%231C1C1C" alt="Watching" />
  </a>
  <a href="https://github.com/polyfillpolyfill/polyfill-service/forks">
    <img src="https://img.shields.io/github/forks/polyfillpolyfill/polyfill-service?style=plastic&logo=github&color=%236C6C6C" alt="Foks" />
  </a>
  <a href="https://x.com/polyfill_global">
    <img src="https://img.shields.io/twitter/follow/polyfill_global?style=plastic&logo=github&color=%236C6C6C" alt="Foks" />
  </a>  
  
</div>
</div>

##

English | [中文](./README_cn.md) | [日本語](./README_ja.md) | [Tiếng Việt](./README_vt.md) | [española](./README_es.md) | [française](./README_fr.md) | [Português](./README_pt.md) | [বাংলা](./README_bn.md) | [Deutsch](./README_de.md) | [हिंदी](./README_hi.md)

## Announcement

We have transitioned to utilizing Cloudflare as our Content Delivery Network (CDN) provider. We apologize for any inconvenience that may have arisen during this migration period. Please rest assured that we will continue to offer the polyfill service at no cost.

## Documentation

Polyfill.io documentation is [on the website][website].


## [Contributing][contributing guide]

Read our [contributing guide] to learn about our development process, how to propose bugfixes and improvements, and how to build and test your changes.

## Self-Hosting

<https://github.com/jakeChampion/polyfill-service-self-hosted/>


## License

Polyfill.io is licensed under the terms of the [MIT license][license]. Contributors must accept our [contribution terms].

[contributing guide]: ./.github/CONTRIBUTING.md
[contribution terms]: ./.github/contribution_licence_agreement.md
[license]: ./LICENSE.md
[license-badge]: https://img.shields.io/badge/license-MIT-blue.svg
[pull-requests-badge]: https://img.shields.io/badge/PRs-welcome-brightgreen.svg
[website]: https://polyfill.io