3 ms·

I'm pretty sure IE9 does not support CSS transitions or CSS animations in general. There is also a lack of support of most CSS gradients. Websockets and web wor

by axlee 10y ago

I'm pretty sure IE9 does not support CSS transitions or CSS animations in general. There is also a lack of support of most CSS gradients. Websockets and web workers aren't supported either. A lot of HTML5 form elements are also missing.