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From: Mark Smith on 26 May 2010 09:49 Is it possible to select elements conditionally based on what they contain? For example, is there a combination of CSS selectors that would select all divs that do not contain a span? Thanks
From: Thomas 'PointedEars' Lahn on 26 May 2010 12:53 Mark Smith wrote: > Is it possible to select elements conditionally based on what they > contain? Not with CSS. > For example, is there a combination of CSS selectors that would select > all divs that do not contain a span? No. What do you need this for? POintedEars -- Use any version of Microsoft Frontpage to create your site. (This won't prevent people from viewing your source, but no one will want to steal it.) -- from <http://www.vortex-webdesign.com/help/hidesource.htm> (404-comp.)
From: Mark Smith on 27 May 2010 04:45 On May 26, 5:53 pm, Thomas 'PointedEars' Lahn <PointedE...(a)web.de> wrote: > Mark Smith wrote: > > Is it possible to select elements conditionally based on what they > > contain? > > Not with CSS. > > > For example, is there a combination of CSS selectors that would select > > all divs that do not contain a span? > > No. What do you need this for? > I have a table generated in the format of <table> <thead> <tr><th><span class="X">...</span></th><th><span class="Y">...</span></th><th><span class="Z">...</span></th></tr> </thead> .... I want to hide the column headers that contain spans of certain classes. Was hoping it would just be a styling change, but looks like I have to hack the library now to apply the class to the actual TH elements as well...
From: Andy Dingley on 27 May 2010 06:21 On 26 May, 14:49, Mark Smith <marksmith5...(a)jungle-monkey.com> wrote: > Is it possible to select elements conditionally based on what they > contain? You're looking for predicates, and in general there isn't any such mechanism in CSS (look at XPath for an example of one). If you read Haakon Lie's PhD thesis, the rationale behind these decisions is explained more fully. CSS is in many ways a reaction to previous stylesheet languages, such as DSSSL, and their over- complexity. An axiomatic assumption behind CSS is that it will only need to be applied to documents that are the output from a fairly sophisticated publishing process (i.e. it can reasonably make demands that these documents contain extra markup to assist CSS), rather than optimised for terseness and simplicity of coding them. This allows significant simplifications in CSS itself, achieving clarity of the CSS specification, and also simplicity of CSS implementations. The "CSS way" of working is that rather than writing complicated CSS selectors that can infer a lot from document structure, you write documents with additional explicit classes where this implied condition would be met. The CSS is then an easy match for a class. You are forced to pre-process the HTML (or hand-edit) to achieve this. This is easier and simpler overall, even if it is indeed shifting work from the browser coder to the site author.
From: David Stone on 27 May 2010 09:27
In article <43080329-d505-440a-ac09-e1cddca51e39(a)a16g2000vbr.googlegroups.com>, Mark Smith <marksmith5555(a)jungle-monkey.com> wrote: > On May 26, 5:53 pm, Thomas 'PointedEars' Lahn <PointedE...(a)web.de> > wrote: > > Mark Smith wrote: > > > Is it possible to select elements conditionally based on what they > > > contain? > > > > Not with CSS. > > > > > For example, is there a combination of CSS selectors that would select > > > all divs that do not contain a span? > > > > No. What do you need this for? > > > > I have a table generated in the format of > > <table> > <thead> > <tr><th><span class="X">...</span></th><th><span > class="Y">...</span></th><th><span class="Z">...</span></th></tr> > </thead> > .... > > I want to hide the column headers that contain spans of certain > classes. > > Was hoping it would just be a styling change, but looks like I have to > hack the library now to apply the class to the actual TH elements as > well... Why not just class the th and drop the span? Reduces the markup... |