Hacker News Reader

Yes, it's called "JavaScript". Specifically, combining generators with promises.

http://blog.alexmaccaw.com/how-yield-will-transform-node

Definitely not as clean as a whole new language, but you can program like this today, at least in bleeding edge node and some recent browsers.

That would be TameJS: https://github.com/maxtaco/tamejs

Try http://www.neilmix.com/narrativejs/doc/ -- "a small extension to the JavaScript language that enables blocking capabilities for asynchronous event callbacks".

StratifiedJS allows you to write callback-less async code, including full support for exceptions thrown from async code (stacktraces and all):

http://onilabs.com/stratifiedjs (disclosure: I work at Oni Labs)

It does extend JS with some additional syntax as well (new concurrency constructs as well as some syntactic sugar), but it doesn't alter existing JS syntax.