The TreeWalker.previousNode()
method moves the current Node
to the previous visible node in the document order, and returns the found node. It also moves the current node to this one. If no such node exists,or if it is before that the root node defined at the object construction, returns null
and the current node is not changed.
Syntax
node = treeWalker.previousNode();
Example
var treeWalker = document.createTreeWalker( document.body, NodeFilter.SHOW_ELEMENT, { acceptNode: function(node) { return NodeFilter.FILTER_ACCEPT; } }, false ); var node = treeWalker.previousNode(); // returns null as there is no parent
Specifications
Specification | Status | Comment |
---|---|---|
DOM The definition of 'TreeWalker.previousNode' in that specification. |
Living Standard | No change from Document Object Model (DOM) Level 2 Traversal and Range Specification |
Document Object Model (DOM) Level 2 Traversal and Range Specification The definition of 'TreeWalker.previousNode' in that specification. |
Recommendation | Initial definition. |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | 1.0 | 2.0 (1.8.1) | 9.0 | 9.0 | 3.0 |
Feature | Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|
Basic support | (Yes) | 1.0 (1.8.1) | (Yes) | 9.0 | 3.0 |
See also
- The
TreeWalker
interface it belongs to.