The TreeWalker filter property returns a Filter node that is a filtering object associated with the created TreeWalker. It is a read-only property.
When creating the TreeWalker, the filter node or object is passed as the third parameter which is retrieved using this property.
nodeFilter = treeWalker.filter;
Return Value: This property returns a node filter of the TreeWalker.
Example: In this example, we will get the node filter of the TreeWalker using this property.
Before Clicking the Button:
After Clicking the Button: In console filter, node can be seen.
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