Typescript without Intellisense is kind of useless in my opinion... I never had any problems with my typescript intellisense NOT working, but I haven't used typescript in a while. When I started using it again, I noticed that my intellisense isn't working, what a bummer. I worked like this for a few days but it was wasting a lot of time NOT having intellisense . So obviously, I started to uninstall and reinstall typescript , web essentials and all those things that you would think causes the problem. Nothing worked. I have MYSQL installed on my machine, and I came across a thread that suggested that you uninstall "MYSQL Tools for Visual Studio" BAM! Sure thing, after uninstalling MySql tools for VS and restarting Visual Studio it started working again, and I have been coding happily ever after. * If this not solve your problem, then try the following: Install " Visual Studio Extensions for Windows Library for Javascript" for your version ...
Just one developer helping another ;-)