- From: Marat Tanalin <mtanalin@yandex.ru>
- Date: Thu, 22 Jan 2015 03:32:52 +0300
- To: Tab Atkins Jr. <jackalmage@gmail.com>
- Cc: "www-style@w3.org" <www-style@w3.org>
28.01.2012, 03:34, "Tab Atkins Jr." <jackalmage@gmail.com>:
> 2012/1/27 Marat Tanalin | tanalin.com <mtanalin@yandex.ru>:
>> 28.01.2012, 03:08, "Tab Atkins Jr." <jackalmage@gmail.com>:
>>> On Fri, Jan 27, 2012 at 3:05 PM, Marat Tanalin | tanalin.com
>>> <mtanalin@yandex.ru> wrote:
>>>> It would be nice to have combinator to select previous sibling.
>>>>
>>>> P - UL {
>>>> /* Styles for UL element which is
>>>> previous sibling of P element. */
>>>> }
>>>>
>>>> The "-" combinator is functionally similar to existing "+" combinator, but selects previous-sibling element instead of next-sibling one.
>>>>
>>>> So in result we would have "+" to move forward, and "-" to move backward (like element.nextSibling and element.previousSibling in DOM, respectively).
>>>>
>>> This is already possible with Selectors 4, using the normal sibling
>>> combinator and the subject indicator:
>>>
>>> !ul + p { ... }
>>>
>> And how would you write following selector using subject indicator?
>>
>> P - UL > LI {...}
>
> Using the future extension to :matches() to allow complex selectors:
>
> :matches(!ul + p) > li {...}
>
> Or, if I get my way, with :has():
>
> ul:has(+p) > li {...}
Given that the subject indicator is dropped [1], and `:has()` is not going to be available in fast profile (and therefore in CSS) [2], it probably makes sense to reconsider adding the previous-sibling combinator available in CSS.
[1] https://lists.w3.org/Archives/Public/www-style/2014Feb/0617.html
[2] http://dev.w3.org/csswg/selectors/#fast-profile
Received on Thursday, 22 January 2015 00:33:23 UTC