NodeIterator.previousNode()
The NodeIterator.previousNode()
method returns the
previous node in the set represented by the NodeIterator
and moves the
position of the iterator backwards within the set.
This method returns null
when the current node is the first node in the
set.
In old browsers, as specified in old versions of the specifications, the method may
throws the INVALID_STATE_ERR
DOMException
if this method
is called after the NodeIterator.detach()
method. Recent browsers never
throw.
Syntax
node = nodeIterator.previousNode();
Example
var nodeIterator = document.createNodeIterator(
document.body,
NodeFilter.SHOW_ELEMENT,
{ acceptNode: function(node) { return NodeFilter.FILTER_ACCEPT; } },
false // this optional argument is not used any more
);
currentNode = nodeIterator.nextNode(); // returns the next node
previousNode = nodeIterator.previousNode(); // same result, since we backtracked to the previous node
Specifications
Specification |
---|
DOM Standard # dom-nodeiterator-previousnode |
Browser compatibility
BCD tables only load in the browser
See also
- The interface it belongs to:
NodeIterator
.