On: TypeScript included with Visual Studio 2013 Update 2

[FourthProtocol]

Not sure I understand your use of REPL - in Visual Studio you edit XAML in the right pane, and the change is reflected in the left pane as you type. That's more efficient than editing HTML or CSS in a text editor, saving, switching to browser, refreshing page. Can you explain?

[radicalbyte → FourthProtocol]

The XAML editor in Visual Studio was broken for years. Blend, once you learn how to use it, is a much nicer tool.

In any case, unlike HTML you really don't want to be writing XAML by hand.

[FourthProtocol → radicalbyte]

I write all my XAML by hand. Blend is a bit too cavalier for my liking, especially when building for Windows Phone.

[sehr → FourthProtocol]

That's entirely dependent on your workflow isn't it? I can set up a workspace within dev tools and edit HTML/CSS/JS on the fly and have the changes reflected on disk and on screen without ever losing sight of my work. Add in the networking tools (timelines, profiles etc..) and I have full featured 'IDE' that I can also browse hackernews with.