Please visit https://github.com/web-animations/web-animations-js for

• Web Animations polyfill code and releases
• documentation for the usage of the polyfill
• documentation for contributing to the polyfill
• filing bugs against the polyfill

This repository used to be used for development of the Web Animations polyfill at web-animations/web-animations-js. As of 11 Nov 2016, this repository has been turned down. All development of the polyfill should now be carried out against the dev branch of the web-animations-js repository.