requestAnimationFrame polyfill

Is there plans to support requestAnimationFrame?

The polyfill plans, if planned I propose to be as follows---

• Ancient webkit and firefox: redirect to mozRAF, webkitRAF (RAF is abbreviated) / mozCAF, webkit CRAF, etc.
• Older broswers / node: Store a list of callbacks, pump them every 16ms (so all usages of RAF animates at the same time)