HTML DOM NodeIterator filter property

Last Updated : 29 Jul, 2020

The NodeIterator filter property returns a NodeFilter object, which is an object that implements an acceptNode(node) method, used to screen nodes.

While creating a NodeIterator, the filter object is passed as the third parameter in createNodeIterator() method, and the object method acceptNode(node) is called on every single node to determine whether to accept it. This is a read-only property.

Syntax:

nodeFilter = nodeIterator.filter;

Return Value: returns a NodeFilter object.

Example: In this example, we will create a node iterator and will get the NodeFilter object using this property.

<!DOCTYPE HTML>  
<html>   
<head> 
    <meta charset="UTF-8"> 
    <title>HTML | DOM NodeIterator filter property</title> 
</head>    
  
<body style="text-align:center;"> 
    <h1 style="color:green;">   
     GeeksforGeeks 
    </h1>  
    <p>  
HTML | DOM NodeIterator filter property 
    </p> 
  
    <button onclick = "Geeks()"> 
    Click Here 
    </button> 
    <p id="a"></p> 
    <script>  
        var a = document.getElementById("a"); 
        function Geeks(){ 
           const nodeIterator = document.createNodeIterator( 
            document.body, 
            NodeFilter.SHOW_ELEMENT, 
            { acceptNode: function(node) { 
 return NodeFilter.FILTER_ACCEPT; } }, 
            false 
        ); 
           console.log(nodeIterator.filter); 
             
} 
</script> 
</body> 
</html>