TreeWalker: previousSibling() method
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 Standard # dom-treewalker-previoussibling |
Browser compatibility
BCD tables only load in the browser
See also
- The
TreeWalker
interface it belongs to.