What is the correct way to detect Opera using jQuery?

Question

Amazon.com recently updated their javascript, and it\'s causing problems with some Opera browsers.

Their browser detection code looks like so, but it\'s faulty:

Answer 1

I think this way is the best
if ( window.opera.version() == 12) { }
This example check if opera version is 12. Very useful when I have problems with font-face in Opera.