[rdo]

Here's what Anders thinks about C# to js cross compilation at about 2m 20s into this interview at Build.

http://channel9.msdn.com/Events/Build/2014/9-010

"That is darn near impossible to do with any level of fidelity that is meaningful"

"If you're going to write for the web, write for the web."

[MichaelGG]

Perhaps he's biased because he made TypeScript? Then again, this is from the main guy behind C#. The language that chose "delegate" as it's lambda keyword (fixed it later at least), decided tuples aren't worth supporting, went with C-style optional parameters after years of promoting overloads instead (both terrible ideas), and barely has type inference. (Just a few things that popped in the top of my mind.)

Write for the web seems like a lame excuse to not embrace better languages and deal with the issues in cross compilation.