These are modern โEmulated Devicesโ (a.k.a. responsive dimensions) for Chrome DevToolsโ Mobile Device Viewport Mode.
They are specifically Apple devices, subtracting for recent Safariย UI (asย in window.innerWidth
/Height
), andย cleverly sorted with some dark-arts unicode shenanigans. (This glitchy, unloved portion of the tools sorts lexicographically, because ofย course itย would.) Ergonomics!
ย
Note
Updated June 2025 with some notes from folks below! TL;DR: use Vibranium!