October 2007
Beginner
408 pages
9h 17m
English
Content preview from Building a Web Site For Dummies®, 3rd Edition
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Contextual Selectors
A contextual selector, as you might guess from the apt description, is a selector that works only within a certain context. The context that’s referred to is the parent element of another element. Normally, when one element is contained within another — as when a heading contains some kind of emphasis on a particular word (like bolding it) — the contained element inherits the properties of its parent element.
Okay, that’s a long-winded way of saying that if you set your H1 elements to be blue and you add <B></B> tags around one word in one H1 element, that bolded word will also be blue. But what if you want all B elements that appear within an H1 element to turn green? You can do that, no problem. And, because you’re using contextual selection, no B elements that appear outside an H1 element will be affected. Here’s how the code for such a style declaration actually looks:
<HEAD> <STYLE> H1 {color:blue} H1 B {color:green} </STYLE> </HEAD>
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