public interface CSSRuleList
CSSRuleList interface provides the abstraction of an ordered collection of CSS rules.
The items in the CSSRuleList are accessible via an integral index, starting from 0.
See also the Document Object Model (DOM) Level 2 Style Specification.
int getLength()
CSSRules in the list. The range of valid child rule indices is
0 to
length-1 inclusive.
CSSRuleitem(int index)
null.
index - Index into the collection
index position in the
CSSRuleList, or
null if that is not a valid index.