This is Hype AnimationFrame, a wrapper for requestAnimation frame that cleans up after itself made for 

Version 1.0 

Converted into a self contained extension

Version 1.1

Version 1.2

Version 1.3

Latest version can be linked into your project using the following in the head section of your project:

Optionally you can also link a SRI version or specific releases. 

Read more about that on the JsDelivr (CDN) page for this extension at https://www.jsdelivr.com/package/gh/worldoptimizer/HypeAnimationFrame

Learn how to use the latest extension version and 
how to combine extensions into one file at

https://docs.hypecookbook.de/Including-external-files-and-Hype-extensions

Get the best out of Tumult Hype with Hype AnimationFrame, a powerful wrapper for requestAnimationFrame. Access the online example and GitHub repository for easy integration. Stay up-to-date with the version history and learn how to link the latest version

Hype Animation Frame