I thought he was doing a “down under” or “made in china” joke with the upside down text. That would have been funny. I’ve tried turning the laptop upside down and typing this 3 times and it always seems the same so I really don’t see what the big deal is.
The answer is JavaScript, and I’ve never seen anyone do that. It’s interesting.
i don’t know enough about html to know if there is markup for inverted characters and the js is just used to shortcut the output? or is the whole thing a js process?