_This issue was originally filed by @bp74_ --- **What steps will reproduce the problem?** void main() { window.requestAnimationFrame(onAnimationFrame); } bool onAnimationFrame(var currentTime) { window.requestAnimationFrame(onAnimationFrame); print("$currentTime"); return true; } **What is the expected output? What do you see instead?** The method "onAnimationFrame" should be called continuously. Issue #2185 made requestAnimationFrame available in IE9. This is no longer the case, now you get this error: SCRIPT438: object doesn't support property or method '$call$0' **What version of the product are you using? On what operating system?** Dart Editor 7566 32 Bit, Windows 7 64 Bit