Used to retrieve a CSS rule by ordinal index. The order in this
collection represents the order of the rules in the CSS style sheet.
If index is greater than or equal to the number of rules in the list,
this returns
null
.
Returns:
The style rule at the
index
position in the
CSSRuleList
, or
null
if that is not a
valid index.
Parameters:
-
index - Index into the collection