Microsoft has released ASP.NET and Web Tools for Visual Studio 2013 Preview with a new HTML editor for razor and web project HTML files and browser link, which make use of a SignalR channel between browsers and Visual Studio 2013 preview.
With the help of the browser link feature, you will be able to connect multiple browsers to your development site, including mobile emulators, and click refresh to refresh all the browsers all at the same time.
The new HTML editor provides a single unified HTML5 based schema with some improvements such as automatic brace completion, jQuery UI and AngularJS attribute IntelliSense, attribute IntelliSense Grouping. However, the product team has retained the current editor for Web Form and Windows Store JavaScript application HTML files.
The web tools preview includes a simple UI for the development of Web Forms, MVC and Web API based ASP.NET applications with support for automatic test project creation in addition to an Intranet site template and the ability to choose different configuration options from within the one ASP.NET project wizard. It also make use of Bootstrap to provide responsive design and theming capabilities and OWIN middleware for ASP.NET based authentication.
Microsoft has added support for claims based authentication with which users can be verified using username and password, social services or using organizational accounts. It is also possible to authorize requests from client applications to your Web APIs using OAuth2 2.0 bearer tokens. Moreover, MVC5 projects are now considered as standard web applications and do not make use of their own project GUID and are created upon selecting MVC checkbox in One ASP.NET project dialog.
The Visual Studio 2013 preview ships with SignalR 2.00 Beta1 and Entity Framework 6.0.0 beta1. It includes support for Web Forms Scaffolding, MonoTouch, MonoDroid, Microsoft.AspNet.SignalR.SelfHost and is backwards compatible for servers.