There was not a lot of support for Angular in Visual Studio, outside of Visual Studio’s standard features such as code completions, IntelliSense, and Go to Definition.

The Angular team developed the Angular Language Service that powers the new extension. Much like the multitude of language services -- following the Language Server Protocol -- that turn Visual Studio ...

New capabilities support the latest programming frameworks and IDEs, including Angular, Visual Studio 2017, jQuery 3, ASP.NET Core and Xamarin.