When you look at the CSS for this to work, it seems pretty straightforward. Actually, that’s not the case at all. I have Autoprefixer enabled on the pen, so this is all I have to write in order to target a fullscreened (that’s a word now) element:
Yep, one for each major browser, plus the actual standard, which is what everybody will use eventually. (That’s what we developers tell ourselves, anyway.) At least using post-processors like Autoprefixer saves us having to write more CSS.