- From: Kang-Hao (Kenny) Lu <kennyluck@csail.mit.edu>
- Date: Thu, 05 Apr 2012 09:55:55 +0800
- To: "Tab Atkins Jr." <jackalmage@gmail.com>, Cynthia Shelly <cyns@microsoft.com>
- CC: "www-style@w3.org" <www-style@w3.org>, "wai-xtech@w3.org" <wai-xtech@w3.org>
(12/03/31 2:13), Tab Atkins Jr. wrote: > On Fri, Mar 30, 2012 at 10:54 AM, Cynthia Shelly <cyns@microsoft.com> wrote: >> 5.1.2 >> Are ‘ vw’ ‘vh’ ‘vmin’ supported in any existing browsers? >> Is there a way to specify a minimum absolute size for these? It seems like >> this could easily get too small to read. >> It does, however, seem useful for scalable/zooming UI > > The v* units are currently supported in IE, and a patch applying them > to WebKit is nearly finished. I'm not sure of their status in other > browsers. > > There is no way to set an absolute minimum size for them. The v* > units are effectively identical to using percentages; their advantage > is that you don't need the entire ancestor chain to be "100%" in the > relevant property. Would something like 'min-width'[1] and 'min-height' in @viewport fulfilll this need? >> 6.3 frequency >> Please add a note that frequencies near 7hz can cause seizures, and link to >> WCAG. More detail in WCAG >> http://www.w3.org/WAI/WCAG20/quickref/20071211/Overview.php#seizure > > This only applies to the frequency of things that are flashing or > changing color/brightness/etc., right? There is no such use of > frequencies in CSS right now. The frequency units are currently used > only in the Speech spec, where such a warning would be nonsensical. Or in some sense interchangeable, a duration of 0.142857s can cause seisure. However, I think this sort of note would be more useful if it's part of CSS3 Animations. A side comment, it seems reasonable to have the 'animation' shorthand accept <frequncy> to simultaneously set 'animation-iteration-count' to 'infinite' and 'animation-duration' to the reciprocal, but I am not a Web Developer and I am not sure if this is useful. >> 8.3 attribute reference >> It would be great to have an example of using this to style elements with >> ARIA attributes on them. Would you be willing to work with PF and WCAG on a >> set of techniques around this, in addition to a simple example in the spec. > > As far as I know, there's no aria attribute where you'd ever want to > use its value as a CSS value. You want to apply properties *based on* > the values, but that's done with Selectors. > > Do you have an example to the contrary? It seems interesting combination if attr() supports 'element' as a <type>. Something in the line of [aria-describedby] { nav-left: attr(aria-describedby element); } but again, I am not close to knowing ARIA much to actually raise such a proposal. What do you think? [1] http://dev.w3.org/csswg/css-device-adapt/#the-lsquomin-widthrsquo-and-lsquomax-wid Cheers, Kenny
Received on Thursday, 5 April 2012 01:56:24 UTC