HasXPath Method

Determines whether a specific element exists in the document.

Syntax

qbobject.hasXPath(xpath, [callback])

Callback

The 'callback' parameter specifies a function which will be called when the operation completes (or an error is encountered). If the 'callback' parameter is not specified, then the method will block and will not return until the operation completes (or an error is encountered).

The callback for this method is defined as:

function(err, data){ }

'err' is the error that occurred. If there was no error, then 'err' is 'null'.

'data' is the value returned by the method.

'err' has 2 properties which hold detailed information:

err.code
err.message

Remarks

The XPath property implements a subset of the XML XPath specification, allowing you to point to specific elements in the XML response.

The path is a series of one or more element accessors separated by '/'. The path can be absolute (starting with '/') or relative to the current XPath location.

Setting the XPath property to an xpath that does not exist will cause an error. You can use the HasXPath method to determine if a particular xpath exists before setting it with XPath.