How to use javascript copy node cloneNode ()

Source: Internet
Author: User

The cloneNode (a) method accepts a Boolean parameter, indicating whether to copy data in depth.
True: Performs deep copy to copy the current node and the entire subnode tree.
False: copy the node only.
The node copy returned after the copy belongs to the document, but there is no parent node. Unless appendChild, insertChild (), replaceChild () is used to add it to the document
Copy codeThe Code is as follows:
<Div id = "guoDiv">
<Span> 1 </span>
<Span> 2 </span>
<Span> 3 </span>
</Div>
Var oDiv = document. getElementById ("guoDiv ");
Var deepList = oDiv. cloneNode (true); // copy a subnode
Alert (deepList. childNodes. length); // 3 or 7 (the results are different due to compatibility issues)
Var showList = oDiv. cloneNode (false); // only copy the reference of the current element
Alert (showList. childNodes. length); // 0

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