Ah hah!

The difference in behaviour is caused by WWW::Mechanize::Firefox / MozRepl::RemoteObject using XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, while your code uses XPathResult.ANY_TYPE. I'm not certain about whether ANY_TYPE will guarantee an ordered snapshot, which I consider important, as I'd like the nodes to appear in "document order" in the result, and I'd like them to remain unchanged from the time the snapshot was taken, because there is transfer latency between Firefox and Perl.

The documentation talks about nodes, so it seems that there is no way to get an ordered snapshot with strings...

I don't see an easy way to automatically determine the "natural" result type of an expression, so in the middle term, MozRepl::RemoteObject::Methods::xpath needs to also take the result type as an (optional) parameter. Then, the Firefox ->xpath API can be extended to allow specifying the kind of result.

In reply to Re^2: Some issues with WWW::Mechanize::Firefox->xpath() method (ctrl+shift+k, stringValue) by Corion
in thread Some issues with WWW::Mechanize::Firefox->xpath() method by dfaure

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