- From: Chris Eppstein <chris@eppsteins.net>
- Date: Wed, 29 Feb 2012 16:01:16 -0800
- To: "Tab Atkins Jr." <jackalmage@gmail.com>
- Cc: www-style@w3.org
- Message-ID: <CANyEp6W8u59ReZf7PPWhet7TVrz+w0T-EH6_6bu54_i_dk1DMA@mail.gmail.com>
Great. Our users really enjoy this feature =) chris On Wed, Feb 29, 2012 at 3:54 PM, Tab Atkins Jr. <jackalmage@gmail.com>wrote: > On Wed, Feb 29, 2012 at 3:42 PM, Chris Eppstein <chris@eppsteins.net> > wrote: > > I was reading through http://dev.w3.org/csswg/css3-hierarchies/ and > noticed > > that there was no provision for nesting an @media directive inside a > > hierarchical selector context. > > > > In Sass we let @media be nested in any selector and then "bubble" that > > @media query to the top level. > > > > For example: > > > > .context { > > & .module { > > float: left; > > width: 50%; > > @media all and (max-device-width: 500px) { > > float: none; > > width: auto; > > } > > } > > & p { > > color: #333; > > } > > } > > > > Would be translated to: > > > > .context .module { float: left; width: 50%; } > > @media all and (max-device-width: 500px) { .context .module { float: > none; > > width: auto; } } > > .context p { color: #333; } > > > > similarly, selectors are transparent across the @media boundary: > > > > .context { > > @media all and (max-device-width: 500px) { > > & .nested { > > color: red; > > } > > } > > } > > > > becomes: > > > > @media all and (max-device-width: 500px) { .context .nested { color: > red; } > > } > > > > I think it would be great to amend this spec to make @media (and other > > at-rules?) valid inside a hierarchical selector context. > > Presumably all the at-rules defined in CSS Conditionals would be useful. > > Allowing a ruleset and allowing an at-rule are basically the same, > once you've committed to changing the grammar. It would be pretty > weird if you could nest rulesets in at-rules (like you can now), > at-rules in at-rules (like Conditionals allows), rulesets in rulesets > (like Hierarchies allows), but not at-rules in rulesets. > > This would also require the grammar of those at-rules to accept > declarations instead of just rulesets, when they're nested inside of a > ruleset already. Otherwise you'd be forced to nest an additional > "&{...}" in there. > > Overall, I approve. > > ~TJ >
Received on Thursday, 1 March 2012 00:01:44 UTC