[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

Re: CSS selectors are syntactic sugar for XPath expressions

• From: Roger L Costello <costello@mitre.org>
• To: "xml-dev@lists.xml.org" <xml-dev@lists.xml.org>
• Date: Tue, 22 Mar 2022 11:50:04 +0000

Alex Johannesen wrote:
-----------------------------------------------------------
if you have control over how the XML is written, it's easy;

   <longitude class="coord">...</longitude>
   <latitude class="coord">...</latitude>

Select it with "person.coord", and off you go. The CSS styling interpretation isn't locked to a "each selected bunch are treated as individual items, and then iterated over". It's up to you in how you work with these selectors and compound selections. Often they *are* treated as a group selection, often for performance reasons.
-----------------------------------------------------------

That sounds promising!

Would you (Alex or anyone) give an example of a CSS rule that selects multiple items and styles the items as a group, please? I am trying to think of something analogous to my latitude/longitude problem ... possibly something like this pseudo-CSS-rule:

h1, h2 { if there exists an h2 element, then italicize the h1 element, otherwise boldface the h1 element; }

In that pseudo-CSS-rule the two selected elements - h1 and h2 - are intertwined and operated on together, just like my latitude/longitude problem.

Is that type of thing possible in CSS?

/Roger