, petr.antos wrote

Ray7: and as probably biggest TS project now, tsc source code in few .ts files is really very good start to analyze tooling features support using VS2012 plugin, to try to understand how it works. Already this is pure beauty, you have open compiler interface at aour fingertips, you can skip to definitions, find references, simply everything you do to figure out how yet unknown code works; so good to learn how much MS eats own dog food (not foot:-)) here Smiley

I think the big win here is the compiling compiler. And I think MS clearly recognises that they'll get much more traction by extending Javascript rather than writing a new language.