TreeWalker: filter property

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.

Value

A NodeFilter object.

Examples

js
const treeWalker = document.createTreeWalker(
  document.body,
  NodeFilter.SHOW_ELEMENT,
  {
    acceptNode(node) {
      return NodeFilter.FILTER_ACCEPT;
    },
  },
);
nodeFilter = treeWalker.filter; // document.body in this case

Specifications

Specification
DOM Standard
# dom-treewalker-filter

Browser compatibility

BCD tables only load in the browser

See also