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I haven't looked at this implementation specifically, but the issue with many similar proposals/implementations is that the generated JavaScript is ugly. One of the nice things about CoffeeScript is that there's no magic--it's very easy to figure out what the generated JavaScript is doing, and there's a straightforward CS <-> JS mapping. jashkenas (CoffeeScript's author) has been reluctant to change that.

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IIRC, Jeremy Ashkenas actually brought this up in the pull request discussion, but he sounded pretty impressed by the minimalism of the code ICS generates. There seems to be more ideology-based opposition among the community.

I did some simple tests, and frankly the generated code is ugly, certainly by comparison to vanilla CS. Gone is the "oh I see how it did that, it's just a Javascript version of my Coffee!" It's now more like what C++ used to look like when compiled to C (remember cfront? probably not. Be glad you don't).

As someone else said, if you avoid await/defer entirely, it seems to back off to exactly what Coffeescript does, so there is a nice progression path.

code: https://github.com/danx0r/testiced#readme

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