A ruler of sorts? Gives you a sense of how big a CSS pixel is. On desktop, you can auto-scroll and see some nice periodic graphics. Doesn't work too well on mobile. (It seems like the font sizes safari can display is discrete)
Inspired by that webpage that didn't close their h2 tags so the font size kept comically increasing
Due to the hinting that improves a visibility for smaller texts. The exact appearance can depend on font, operating system and text rendering stack; in my desktop Firefox with a specific font, 6.0--6.4, 6.6--8.3, 8.6--9.4, 9.7--10.3, 10.6--11.2, 11.5--13.4 and 13.8--14.6 look same to me for the same reason.
Makes sense for small sizes but having hinting make 31.5 and 35.5 appear the same sounds like a bug. FWIW neither FF, Edge nor IE show that behavior for me.
Funny, it's 36–40 that are the same for me, on iOS, both on Chrome and Safari (makes sense since Chrome renders using Safari). The bug isn't present on Safari on Mac, however, so it seems to be iOS specific.
Yeah at those sizes it's definitely not a hinting artifact or rounding to the nearest integer.
Definitely some kind of bug. I have a hard time imagining what possible mechanism could cause that, though. That's a weird one.
Very cool! Someone has to have made a 3D game out of this, I bet you could have objects on a plane through some clever manipulation of fonts and perhaps unicode.
Ha, the site shows how nice the font rendering on iPad is! Even the smallest ones are clearly visible and all the bigger font sizes are rendered differently. Nice!