Possible Duplicate:
Automatic compilation when file changes
When I add a TypeScript file to my project in Visual Studio, a JavaScript file (the TypeScript compilation result) appears underneath the .ts file in the Solution Explorer.
The .js file is refreshed when I build the project. Is there a way to get this file to refresh when the .ts file is saved without having to rebuild? (as is the case with T4 files)
Officially the answer is, not yet.
However you have some work-arounds available:
How to watch and compile all TypeScript sources?