XPathResult.invalidIteratorState
The read-only invalidIteratorState property of the
XPathResult interface signifies that the iterator has become invalid. It
is true if XPathResult.resultType is
UNORDERED_NODE_ITERATOR_TYPE or ORDERED_NODE_ITERATOR_TYPE and
the document has been modified since this result was returned.
Note: This feature is available in Web Workers
Syntax
var iteratorState = result.invalidIteratorState;
Return value
A boolean value indicating whether the iterator has become invalid.
Example
The following example shows the use of the invalidIteratorState property.
HTML
<div>XPath example</div>
<p>Iterator state: <output></output></p>
JavaScript
var xpath = "//div";
var result = document.evaluate(xpath, document, null, XPathResult.ANY_TYPE, null);
// Invalidates the iterator state
document.querySelector("div").remove();
document.querySelector("output").textContent = result.invalidIteratorState ? "invalid" : "valid";
Result
Specifications
| Specification |
|---|
| DOM Standard # dom-xpathresult-invaliditeratorstate |
Browser compatibility
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