[marshray]

You can use Visual Studio Express 2012 for Web, which is no cost. Older VS's you can of course launch the command line compiler. The generated Javascipt is not mangled and is quite debuggable.

I've been using Vim and the browsers' F12.

[pjmlp]

That might work in a startup, not in an enterprise environment where your computer image is controlled regularly by IT and all software requires approval before use.

[marshray]

It is itself a Javascript program. You can use Typescript in a browser. I once had it working on Windows RT via cscript.exe.

[pjmlp]

The whole issue was about the development environment experience, not how to execute it.