Document: createExpression() method
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.
This method compiles an XPathExpression which can then be used for (repeated) evaluations.
You must call this method on the same document that you run the expression against.
Syntax
js
createExpression(xpathText, namespaceURLMapper)
Parameters
xpathText-
A string which is the XPath expression to be compiled.
namespaceURLMapper-
A function which maps a namespace prefix to a namespace URL (or null if none needed).
Return value
XPathExpression
Examples
js
const xpathExpr = document.createExpression("//div");
const xpathResult = xpathExpr.evaluate(document); // returns an XPathResult object
const nodeContext = document.querySelector("nav");
// Re-using the XPathExpression "xpathExpr"
const otherResult = xpathExpr.evaluate(nodeContext); // returns an XPathResult object
Specifications
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| DOM # dom-xpathevaluatorbase-createexpression |
Browser compatibility
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createExpression
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