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NodeIterator: whatToShow property - Web APIs | MDN
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NodeIterator: whatToShow property
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The NodeIterator.whatToShow read-only property represents
an unsigned integer representing a bitmask signifying what types of nodes
should be returned by the NodeIterator.
Value
An unsigned integer.
The values that can be combined to form the bitmask are:
| Constant | Numerical value | Description |
|---|---|---|
NodeFilter.SHOW_ALL |
4294967295 (that is the max value of unsigned long)
|
Shows all nodes. |
NodeFilter.SHOW_ATTRIBUTE
Deprecated
|
2 |
Shows attribute Attr nodes. This is meaningful
only when creating a NodeIterator or
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
Deprecated
|
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
Deprecated
|
32 |
Legacy, no more used. |
NodeFilter.SHOW_ENTITY_REFERENCE
Deprecated
|
16 |
Legacy, no more used. |
NodeFilter.SHOW_NOTATION
Deprecated
|
2048 |
Legacy, no more used. |
NodeFilter.SHOW_PROCESSING_INSTRUCTION |
64 |
Shows ProcessingInstruction nodes. |
NodeFilter.SHOW_TEXT |
4 |
Shows Text nodes. |
Examples
js
const nodeIterator = document.createNodeIterator(
document.body,
NodeFilter.SHOW_ELEMENT | NodeFilter.SHOW_COMMENT | NodeFilter.SHOW_TEXT,
{ acceptNode: (node) => NodeFilter.FILTER_ACCEPT },
);
if (
nodeIterator.whatToShow & NodeFilter.SHOW_ALL ||
nodeIterator.whatToShow & NodeFilter.SHOW_COMMENT
) {
// nodeIterator will show comments
}
Specifications
| Specification |
|---|
| DOM # dom-nodeiterator-whattoshow |
Browser compatibility
Loading…
See also
- The interface this property belongs to:
NodeIterator.