NodeList interface provides the abstraction of an ordered
collection of nodes, without defining or constraining how this collection
NodeList objects in the DOM are live.
The items in the
NodeList are accessible via an integral
index, starting from 0.
See also the Document Object Model (DOM) Level 3 Core Specification.
The number of nodes in the list.
The number of nodes in the list. The range of valid child node indices
is 0 to
indexth item in the collection. If
index is greater than or equal to the number of nodes in
the list, this returns
|index||Index into the collection.|
indexth position in the
nullif that is not a valid index.