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What / how do you use it? I've only ever used xpath for scraping, and I don't know how it can be useful outside of scraping.

I think you can use it in the browser's inspector.

Yes, you can use `$x("//a/path")`, with (at least) Chrome & Firefox.

And you can do the same for CSS selectors with $$('foo')!

End to end testing comes to mind, for UI testing.