previousSibling

Summary

Retrieves the previous sibling of the current node in the filtered TreeWalker hierarchy and updates currentNode.

Method of dom/TreeWalkerdom/TreeWalker

Syntax

var node = treewalker.previousSibling();

Return Value

Returns an object of type DOM NodeDOM Node

.Object that receives the previous child of a parent node in the filtered TreeWalker hierarchy.

Examples

var treewalker = document.createTreeWalker(
    document.body,
    NodeFilter.SHOW_ELEMENT,
    { acceptNode: function(node) { return NodeFilter.FILTER_ACCEPT; } },
    false
);
var node = treewalker.previousSibling(); // returns null as there is no previous sibiling

Notes

Remarks

previousSibling sets the currentNode to the returned node. It returns null if there are no more child nodes.

Syntax

Standards information

• Document Object Model (DOM) Level 2 Traversal and Range Specification, Section 1.2

Related specifications

DOM

Living Standard

Attributions

• Mozilla Developer Network : [TreeWalker.previousSibling Article]

• Microsoft Developer Network: [previousSibling Method Article]