Comment by n2d4

I mentioned that the title makes no sense in the sentence right after it:

> Yes, the title makes no sense, but you'll see what I mean in just a second.

And yes, I didn't explain the exact mechanics of the ES spec which make it happen — but I would argue that "variables can be modified until they're out-of-scope" is even more unintuitive than just remembering this edge case. And I'm not trying to be an ECMAScript lawyer with the post, rather I'd just show a bunch of "probably unexpected" behaviors of JavaScript.