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

There is a special window.opera object which is present in all Opera 5+ browsers. So something as simple as:

if (window.opera && window.opera.buildNumber) { 
    // we are in Opera 
}

would be enough.