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.
A boolean value indicating whether the iterator has become invalid.
The following example shows the use of the invalidIteratorState
property.
<div>XPath example</div>
<p>Iterator state: <output></output></p>
var xpath = "//div";
var result = document.evaluate(xpath, document, null, XPathResult.ANY_TYPE, null);
document.querySelector("div").remove();
document.querySelector("output").textContent = result.invalidIteratorState ? "invalid" : "valid";