XPathEvaluator
The XPathEvaluator interface allows to compile and evaluate XPath expressions.
It is implemented by the Document interface.
Methods
XPathEvaluator.createExpression()-
Creates a parsed XPath expression with resolved namespaces.
XPathEvaluator.createNSResolver()-
Adapts any DOM node to resolve namespaces allowing the XPath expression to be evaluated relative to the context of the node where it appeared within the document.
XPathEvaluator.evaluate()-
Evaluates an XPath expression string and returns a result of the specified type if possible.
Example
The following example shows the use of the XPathEvaluator interface.
HTML
<div>XPath example</div>
<div>Number of <div>s: <output></output></div>
JavaScript
var xpath = "//div";
var evaluator = new XPathEvaluator();
var expression = evaluator.createExpression(xpath);
var result = expression.evaluate(document, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE);
document.querySelector("output").textContent = result.snapshotLength;
Result
Specifications
| Specification |
|---|
| DOM Standard # interface-xpathevaluator |
Browser compatibility
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