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JavaScript: The Definitive Guide, Fourth Edition
book

JavaScript: The Definitive Guide, Fourth Edition

by David Flanagan
November 2001
Intermediate to advanced content levelIntermediate to advanced
936 pages
68h 43m
English
O'Reilly Media, Inc.
Content preview from JavaScript: The Definitive Guide, Fourth Edition

Name

CSSRuleList — an array of CSSRule objects

Availability

DOM Level 2 CSS

Properties

readonly unsigned long length

The number of CSSRule objects in this CSSRuleList array.

Methods

item( )

Returns the CSSRule object at the specified position. Instead of explicitly calling this method, JavaScript allows you to simply treat the CSSRuleList object as an array and to index it using standard square-bracket array notation. If the specified index is too large, this method returns null.

Description

This interface defines a read-only ordered list (i.e., an array) of CSSRule objects. The length property specifies the number of rules in the list, and the item( ) method allows you to retrieve the rule at a specified position. In JavaScript, CSSRuleList objects behave like JavaScript arrays, and you can query an element from the list using square-bracket array notation instead of calling the item( ) method. (Note, however, that you cannot assign new nodes into a CSSRuleList using square brackets.)

See Also

Type of

CSSMediaRule.cssRules, CSSStyleSheet.cssRules

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Publisher Resources

ISBN: 0596000480Supplemental ContentCatalog PageErrata