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by jashkenas 5539 days ago
Nope. Both of those are JavaScript libraries aimed towards widespread adoption by JavaScript users, and therefore aren't written in CoffeeScript.

That said, I did port Underscore.js to CoffeeScript once, and the resulting compiled JS ran (a little bit) faster than the original version.
1 comments
detst 5539 days ago
Why does that stop you from writing them in CoffeeScript, especially if it's faster? Because you want contributions back to the projects from JS-only developers?
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jashkenas 5539 days ago
Yep. I'm a pragmatist at heart. I don't think that either Underscore.js or Backbone.js would have gotten the same sort of adoption they've seen (eg. github.com/popular/watched) if they had been written in CoffeeScript. Perhaps in a year or two it would be different.
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