Ahh... there's a strict equality operator comparing undefined (both a value and a type) to something that's being coerced to a boolean... it will always return false. The first thing I look at when I see a strict equality comparison is "are the operands actually the same type" because that's a very common mistake (or so I've noticed)!

Huh, now I'm curious if my IDE would highlight this with a warning... will have to check!