CSS3

Advancements like high-performance compiled JavaScript and hardware-accelerated rendering of HTML5 and CSS3 in Internet Explorer 9 and 10 allow Web developers to create richer and richer experiences. Two related features, CSS3 Transitions and CSS3 Animations, give Web developers a declarative way to add personality to Web page interactions easily.

This blog post describes these two features as implemented in IE10 in the Windows Developer Preview and Windows 8 Metro style apps written in HTML.