[1] [CITE[Timing control for script-based animations]]
( ([TIME[2012-02-21 23:13:03 +09:00]] 版))
<http://www.w3.org/TR/2012/WD-animation-timing-20120221/>

[2] [CITE[Timing control for script-based animations]]
( ([TIME[2012-03-01 22:02:03 +09:00]] 版))
<http://dvcs.w3.org/hg/webperf/raw-file/tip/specs/RequestAnimationFrame/Overview.html>