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 | Status | Comment |
---|---|---|
DOM The definition of 'NodeIterator.previousNode' in that specification. |
Living Standard | As detach() is now a no-op method, this method cannot throw anymore. |
Document Object Model (DOM) Level 2 Traversal and Range Specification The definition of 'NodeIterator.previousNode' in that specification. |
Obsolete | Initial definition. |
Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
previousNode | Chrome Full support 1 | Edge Full support 12 | Firefox Full support 3.5 | IE Full support 9 | Opera Full support 9 | Safari Full support 3 | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android Full support 4 | Opera Android Full support 10.1 | Safari iOS Full support 3 | Samsung Internet Android Full support Yes |
Legend
- Full support
- Full support
See also
- The interface it belongs to:
NodeIterator
.