Today, the Web Platform and Tools team announced the release of the first Visual Studio update for web standards, extending support for HTML5, CSS3 and some JavaScript APIs for all versions of Visual Studio 2010.
Download the update can be in the gallery Visual Studio . The update adds prompts (intellisense) and validation for:
HTML5
Audio and Video and related tags,
new types of input forms,
Drag & drop
WAI-ARIA,
Microdata,
Schema.org support
CSS3
2D Transforms,
3D Transforms,
Animations,
Background & Borders,
Basic Box Model,
Basic UI,
Behavior
Color,
Flexible Box Layout,
Fonts
Generated Content for Paged Media,
Hyperlink Presentation
Line,
Lists
Marquee,
Media Queries,
Multi Column
Namespaces,
Paged media
Presentations Levels,
Ruby
Selectors,
Speech,
Syntax,
Template layout,
Text,
Transitions,
as well as support for prefixes for different browsers