- From: Waylon Shao via GitHub <noreply@w3.org>
- Date: Mon, 24 Aug 2026 18:38:33 +0000
- To: public-css-archive@w3.org
> You are describing how `px` was always supposed to work, except that approximations are allowed to be very rough for practical reasons. That its conversion ratio to `pt` and thereby other “absolute” units had to be fixed later on, is unfortunate, but irrelevant here. > > The proposed `vad` unit (and a possible `vam` 1:60 subdivision) would therefore certainly be tied to `px` as well. The only question would be: at which ratio? (after the more important one: is it really needed and worth the cost?) > > Your fallback example suggests 30:1, I’d expect something closer to 45:1 as explained in the original, closed issue. vad do not have fixed ratio to CSS px, nor to physical pixels. It only keep fixed visual angle that the object give eyes. With written vad value like 0.6vad, browser calculate the needed physical pixels just before webpage needs it to show, as per the specification that browser gets from communication with screen controller at that moment. The calculating is based on the custom preferrance viewing distance by viewer, or the specification that the screen will have told browser or operation system, or the default international standard distance for a specific screen. -- GitHub Notification of comment by WaylonShaoinChina Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/14381#issuecomment-5399692617 using your GitHub account -- Sent via github-notify-ml as configured in https://github.com/w3c/github-notify-ml-config
Received on Monday, 24 August 2026 18:38:34 UTC