DOMTreeWalker.FirstChild
FirstChild()
Type:
DOMAttribute,
DOMDocument,
DOMElement,
DOMDocumentType,
DOMNotation,
DOMEntity,
DOMDocumentFragment,
DOMText,
DOMComment,
DOMCDATASection,
DOMProcessingInstruction,
DOMEntityReference,
XPathNamespace;
Undefined.
If visible children are absent, iterator does not move and returns
Undefined.
Performs a switch to a first child. Iterator moves to the first child of the current node that meets node filter conditions.
Server, thick client, external connection, Mobile application (server).