TreeWalker: previousSibling() method
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The TreeWalker.previousSibling() method moves the current
Node to its previous sibling, if any, and returns the found sibling. If
there is no such node, it returns null and the current node is not changed.
Syntax
js
previousSibling()
Parameters
None.
Return value
A Node object or null.
Examples
js
const treeWalker = document.createTreeWalker(
document.body,
NodeFilter.SHOW_ELEMENT,
{
acceptNode(node) {
return NodeFilter.FILTER_ACCEPT;
},
},
false,
);
const node = treeWalker.previousSibling(); // returns null as there is no previous sibling
Specifications
| Specification |
|---|
| DOM # dom-treewalker-previoussibling |
Browser compatibility
| desktop | mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
previousSibling | ||||||||||||
See also
- The
TreeWalkerinterface it belongs to.