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.
TreeWalker: previousSibling() method
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
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
previousSibling |
1 | 12 | 4 | 9 | 9 | 3 | 3 | 18 | 4 | 10.1 | 3 | 1.0 |
See also
- The
TreeWalkerinterface it belongs to.
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https://developer.mozilla.org/en-US/docs/Web/API/TreeWalker/previousSibling