An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.
One of a set of tools we're offering as a way of saying thank you for being a part of the community.
I never use them in my code
fn: indicates the namespace xmlns:fn="http://www.w3.org/2005/xpath-functions"
the namespace of the functions internaly defined in the XPath spec
but if you use the prefix, you also have to declare the prefix this way
xmlns:fn="http://www.w3.org/2005/xpath-functions"
eg.
Open in new window
I simply use it without the prefix, for me that is much clearer
Open in new window
You can not declare functions yourself in that namespace, so your own functions will always need to be prefixed
so the distinction is easy
(I think an early XPath recommendation draft had the fn: as mandatory for XPath functionsn but the requirement was dropped)
Anyhow, simply forget about fn:, they are the same