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Chapter 5
The Cascade, Specificity,
and Inheritance
Other than being the C in the acronym CSS, the fact that style sheets are described
as ???cascading??? is an important, if complex, part of the way styles are applied to the
elements in a document. It??™s called the CSS cascade (p. 118), because style
declarations cascade down to elements from many origins.
The cascade combines the importance, origin, specificity (p. 126), and source order
of the applicable style declarations to determine exactly??”and without
conflict??”which declaration should be applied to any given element.
Inheritance (p. 133) is the means by which, in the absence of any specific declarations
applied by the CSS cascade, a property value of an element is obtained from its
parent element.


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