Oh yeah, turns out chinese hierogliphs can be a variable name. Ok, I won't go any further.

I excluded all symbols that are used in variable names: _, $, now your solution should be invalidated.

I guess you found out that a lot of things can be identifier names in JS. :P

I can still circumvent your restrictions. That's OK with me; forcing JSFuck is not actually a good thing in my book.

( If you start freezing things to prevent this approach, it will trigger an endless war of attrition between "cheating" and anti-cheat, and it will change my vote another grade down. Please don't go there. )

done

should use restricted tag

I further improved the global scope issue by using strict mode and thus not allowing variables to be declared implicitly.

Nevermind, managed to save and republish after closing all the issues

I excluded all symbols that are used in variable names: _, $, now your solution should be invalidated.

Wait, actually, when I tried to save it it shows an error "Default Version is not a supported version", what's that about?

Done

Done

I decided not to handle exceptions, either way it won't pass if it produces one.

Done

|| JSF*ck || has been done. This is not new.

You may want to prevent my solution ( which you can see by clicking View Solution under this comment ).

eval is evil!

( or you may not want to prevent it. that's a reasonable option. )