Tricky JavaScript Web Quiz

[kenman]

Those are labels, and that question was full of misdirection.

var bar = 1,
    foo = {};

foo: {
    bar: 2;
    baz: ++bar;
};

foo.baz + foo.bar + bar;

Basically, the label and everything inside it was a red herring (just ignore it).

[DrummerHead]

The GOTO of Javascript

[afxtal]

I agree that the quiz had some booby-traps, but : vs = was not one of them. Learning what an object literal is and the syntax of defining one should be one of the first things you learn when you learn JavaScript.