JavaScript copy node CloneNode () Use introduction

This article mainly introduced the JavaScript node operation copy node CloneNode () The use, needs the friend may refer to under

The CloneNode (a) method accepts a Boolean parameter that indicates whether a deep copy is true: A deep copy is performed, the node is replicated, and the entire child node tree is copied.  False: Shallow copy. Only the node itself is replicated. The copy of the node returned after the copy belongs to the document, but does not have a parent node. Unless you use Appendchild,insertchild (), replacechild () adds it to the document code as follows: <div id= "Guodiv" > < span>1</span> <span>2</span> <span>3</span> </div> var odiv = Document.getelem  Entbyid ("Guodiv"); var deeplist = Odiv.clonenode (true); Copy child Node alert (deepList.childNodes.length); 3 or 7 (compatibility problem, so the result is not the same) var showlist = Odiv.clonenode (false); Copy only the current element's Reference alert (showList.childNodes.length); 0