XPath can do everything querySelector can do, and more, so when would you ever choose the latter? I haven't seen any speed benchmarks comparing the two, so right now I'm choosing based on syntax conciseness, which seems kind of arbitrary.

Edit: I probably should have stated that I'm writing Greasemonkey scripts for Firefox, so I'm not worried about cross-browser compatibility, and would rather not include any libraries.

javascript xpath css-selectors greasemonkey selectors-api
Edit
Report