Earlier quoted context omitted.
It was written in 2011. Was that tag in regular use at that time? I have no idea.
For reference the iPhone 4 had already been released, so mobile design was already a thing. The viewport meta tag wasn't a thing though, or at least not widespread as HTML5 release spec was finalized by W3C in 2014. I did not see that the website was this old when I first saw it. Still, I've used websites from the 90s that worked better on mobile lol (I also used websites in 2023 that were awful, to be fair).
Apple first invented it for the iPhone 1, published it in 2007, and other manufacturers of mobile browser then copied it.
https://developer.apple.com/library/archive/documentation/Ap...
At the time for iPhone 4 the viewport meta thingy was an old thing, but of course a lot of websites hadn’t updated in the previous four years.
The CSS Working Group has for some years specs in preparation which would make the viewport thingy official: