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499

answers:

1
+6  Q: 

What does @cc_on mean in JavaScript?

Sometimes I see @cc_on in JavaScript. What does it mean?

+10  A: 

It's for conditional compilation. Seems to be a feature of Microsoft's "JScript" ECMAScript implementation.

unwind  2009-08-27 14:25:01
Not IE but JScript (ECMAScript implementation used in IE). This is important because JScript, for example, is also used in ASP, Windows Script Host, etc. See http://en.wikipedia.org/wiki/JScript
kangax  2009-08-28 04:37:24
@kangax: Thanks, updated the answer.
unwind  2009-08-28 08:04:17

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