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I just found out that the following (awesome) syntax is accepted by Firefox
f = function(x) x+1;
f(17) //gives 18
Does anyone know what the hell is going on here? Is this in any standard? Do other browsers also accept it? (I tested IE 8 and it gave me syntax error)
This isn’t part of a standard. The documentation is at https://developer.mozilla.org/en/New_in_JavaScript_1.8#Expression_closures_%28Merge_into_own_page.2fsection%29
There’s discussion about adding some syntax along these lines or even shorter to the standard. See http://wiki.ecmascript.org/doku.php?id=strawman:shorter_function_syntax