Selectors, Specificity, and the Cascade

Applying CSS3 to Documents

By: Eric A. Meyer

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eText | 28 September 2012 | Edition Number 1

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Exactly how does the "cascade" in Cascading Style Sheets work? This concise guide demonstrates the power and simplicity of CSS selectors for applying style rules to different web page elements. You’ll learn how your page’s presentation depends on a multitude of style rules and the complex ways they function—and sometimes collide—within the document’s structure.

This guide is a chapter from the upcoming fourth edition of CSS: The Definitive Guide. When you purchase either the print or the ebook edition of Selectors, Specificity, and the Cascade, you’ll receive a significant discount on the entire Definitive Guide when it’s released. Why wait when you can learn how to use selectors and other key CSS 3 features right away?

Learn how to create CSS rules that apply to a large number of similar elements
Group rules to make style sheets smaller and download times faster
Understand how elements inherit styles from their parents
Discover how reader and browser preferences affect your page presentation
Examine specificity—the method browsers use to choose between two conflicting style rules
Get a handle on how specificity and inheritance combine to form the cascade
Get details on all of the CSS3 selectors