February 2006
Intermediate to advanced
826 pages
63h 42m
English
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Chapter 17. Selectors
The selector is the part of the style rule that
identifies the element (or elements) to which the presentation instructions
are applied. For instance, if you want all of the h1s in a document to be green, write a single
style rule with h1 as the selector. But
that’s just the beginning. CSS provides a variety of selector types to
improve flexibility and efficiency in style sheet authoring. This chapter
introduces the selectors included in the CSS 2.1 specification,
including:
Type (element) selectors
Contextual selectors (descendant, child, and adjacent sibling)
Class and ID selectors
Attribute selectors
Pseudoclasses
Pseudoelements
Not all of these forward-thinking selectors are supported by today’s browsers, so if a particular selector is not quite ready for prime time, it will be noted.
The W3C Selectors specification introduces additional selectors above and beyond those in CSS 2.1, which modern browsers are still in the process of implementing. This book does not describe them. For more information on those new selectors in particular, see the W3C Selectors specification (http://www.w3.org/TR/css3-selectors).
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.