HTML DOM TreeWalker filter Property

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.

Syntax:

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.

HTML

<!doctype html>

<html>
 
<body>

    <h1>GeeksforGeeks</h1>
 
<p>Click Here to get the filter node</p>
 
    <button onclick="get()">Click</button>
 
    <script>

        var treeWalker = document.createTreeWalker

            (document.head, NodeFilter.SHOW_ELEMENT,

                {

                    acceptNode: function (node) 

                    { return NodeFilter.FILTER_ACCEPT; }

                },

                false

            );

        function get() {

            node = treeWalker.filter;

            console.log(node);

        }

    </script>

</body>
 
</html>