Polyfill.io

Polyfill.io is a service which makes web development less frustrating by selectively polyfill just what the browser needs. Polyfill.io reads the User-Agent header of each request and returns polyfill that are suitable for the requesting browser.

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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.

Contributing

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. Contributors must accept our contribution terms.