TreeWalker: 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 TreeWalker.whatToShow read-only property returns a
bitmask that indicates the types of
nodes to show. Non-matching nodes are skipped, but their
children may be included, if relevant.
Value
A non-negative integer. For the list of possible values, see document.createTreeWalker().
Examples
js
const treeWalker = document.createTreeWalker(
document.body,
NodeFilter.SHOW_ELEMENT + NodeFilter.SHOW_COMMENT + NodeFilter.SHOW_TEXT,
{ acceptNode: (node) => NodeFilter.FILTER_ACCEPT },
false,
);
if (
treeWalker.whatToShow === NodeFilter.SHOW_ALL ||
treeWalker.whatToShow % (NodeFilter.SHOW_COMMENT * 2) >=
NodeFilter.SHOW_COMMENT
) {
// treeWalker will show comments
}
Specifications
| Specification |
|---|
| DOM # dom-treewalker-whattoshow |
Browser compatibility
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whatToShow
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Legend
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- Full support
- Full support
See also
- The
TreeWalkerinterface.