Are You Pondering What I'm Pondering?

I find debugging xpath expressions a lot like debugging regular expressions: painful and involving lots of frustrating “why isn’t anything matching” moments. So I threw together an interactive xpath tester. Of course, since this is browser based, it’ll only work in Firefox, but that’s my most common use of xpath anyway (e.g., in greasemonkey scripts).

The page also uses a treewalker and CSS selectors for creating the output tree (most of the code originally from this treewalker demo).

I’m full of w3 standards today.