The TreeWalker.filter read-only property returns a NodeFilter that is the filtering object associated with the TreeWalker.
When creating the TreeWalker, the filter object is passed in as the third parameter, and its method acceptNode() is called on every single node to determine whether or not to accept it.
A NodeFilter object.
js
const treeWalker = document.createTreeWalker(
document.body,
NodeFilter.SHOW_ELEMENT,
{
acceptNode(node) {
return NodeFilter.FILTER_ACCEPT;
},
},
false,
);
nodeFilter = treeWalker.filter; // document.body in this case
| Specification |
|---|
| DOM Standard # dom-treewalker-filter |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
filter |
1 | 12 | 4 | 9 | 9 | 3 | 3 | 18 | 4 | 10.1 | 3 | 1.0 |
TreeWalker interface it belongs to.© 2005–2023 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/TreeWalker/filter