Re: Parent Combinator / Parent pseudo-class

On Jul 23, 2008, at 4:31 AM, Alan Gresley wrote:

> Stephen wrote:
>> Ingo Chao wrote:
>>> 2008/7/19 Stephen <w3mail@jixor.com>:
>>>
>>>> ...
>>>> My concept is that it should be possible to target an element  
>>>> with specific
>>>> children...
>>>>
>>>
>>> div:with-child(h5) {
>>>  float: left;
>>>  overflow: hidden;
>>> }
>>>
>>> I think that would cause a reflow of what is already rendered of the
>>> div when a h5 is encountered.
>>>
>>> regards
>>>
>> I have considered this and to me it would be a matter of choice, a  
>> developer would be aware that it could cause awkward adjustments  
>> however for the rendering engine one would expect it would be no  
>> different to doing it with javascript, which is a quite simple  
>> process, but not really satisfactory as I tend to prefer to avoid  
>> js as much as possible for obvious reasons.
>
>
> A parent combinator pseudo-class or parent pseudo-class requires a  
> CSS parser to walk the chain.

Only of immediate children, not of all descendants of a particular has- 
child selector. Anyone using it more than sparingly should expect some  
performance degradation.