Returns a new NodeIterator object.


const nodeIterator = document.createNodeIterator(root[, whatToShow[, filter]]);



The root node at which to begin the NodeIterator's traversal.

whatToShow Optional

Is an optional unsigned long representing a bitmask created by combining the constant properties of NodeFilter. It is a convenient way of filtering for certain types of node. It defaults to 0xFFFFFFFF representing the SHOW_ALL constant.

Constant Numerical value Description
NodeFilter.SHOW_ALL 4294967295 (that is the max value of unsigned long) Shows all nodes.
NodeFilter.SHOW_ATTRIBUTE 2 Shows attribute Attr nodes. This is meaningful only when creating a TreeWalker with an Attr node as its root. In this case, it means that the attribute node will appear in the first position of the iteration or traversal. Since attributes are never children of other nodes, they do not appear when traversing over the document tree.
NodeFilter.SHOW_CDATA_SECTION 8 Shows CDATASection nodes.
NodeFilter.SHOW_COMMENT 128 Shows Comment nodes.
NodeFilter.SHOW_DOCUMENT 256 Shows Document nodes.
NodeFilter.SHOW_DOCUMENT_FRAGMENT 1024 Shows DocumentFragment nodes.
NodeFilter.SHOW_DOCUMENT_TYPE 512 Shows DocumentType nodes.
NodeFilter.SHOW_ELEMENT 1 Shows Element nodes.
NodeFilter.SHOW_ENTITY 32 Legacy, no more usable.
NodeFilter.SHOW_ENTITY_REFERENCE 16 Legacy, no more usable.
NodeFilter.SHOW_NOTATION 2048 Legacy, no more usable.
NodeFilter.SHOW_PROCESSING_INSTRUCTION 64 Shows ProcessingInstruction nodes.
NodeFilter.SHOW_TEXT 4 Shows Text nodes.
filter Optional

An object implementing the NodeFilter interface. Its acceptNode() method will be called for each node in the subtree based at root which is accepted as included by the whatToShow flag to determine whether or not to include it in the list of iterable nodes (a simple callback function may also be used instead). The method should return one of NodeFilter.FILTER_ACCEPT, NodeFilter.FILTER_REJECT, or NodeFilter.FILTER_SKIP. See the Example.


const nodeIterator = document.createNodeIterator(
      acceptNode(node) {
        return node.nodeName.toLowerCase() === 'p' ? NodeFilter.FILTER_ACCEPT : NodeFilter.FILTER_REJECT;
const pars = [];
let currentNode;

while (currentNode = nodeIterator.nextNode()) {


DOM Standard (DOM)
# dom-document-createnodeiterator

Browser compatibility

BCD tables only load in the browser