One of the most highly anticipated features is the support for client
Javascript Intellisense within Visual Studio "Orcas" (this feature
also works in the free Visual Web Developer Express edition).
If you have ever been frustrated by manually typing Javascript before,
you are going to be in for a pleasant treat with "Orcas". Visual
Studio now provides full Javascript Intellisense completion in .aspx
files, .htm files, as well as in external .js files. It delivers
Intellisense for vanilla Javascript code, as well as provides rich
support for the new ASP.NET AJAX client Javascript framework and
Javascript code built with it.
You can read more about some of the Visual Studio "Orcas" Javascript
features in these two overview posts from the VS Web Tools Team here:
JavaScript Intellisense in Visual Studio Orcas
JavaScript Debugging in Visual Studio Orcas
As Wally recently blogged about, one of the cool things about the VS
"Orcas" Javascript Intellisense support is that it has been designed
to "just work" out of the box. This means you don't have to run any
tools on your Javascript files to build-up the Intellisense hints.
Nor do you have to decorate your Javascript in a specific way in order
to make it work. If you have a standard Javascript function or
prototype class you've built in your external Javascript file, you
should get Intellisense completion against it within Visual Studio
automatically.