And, with AJAX, a client may not display anything relevant at all. Or maybe it is the sequence that matters, not only one request. But many times, HTTP requests leave the client and responses are received long before a human could collect screen captures. Screenshots from the browser or client sometimes provide this answer. Troubleshooting and debugging Web applications starts with a basic question: what does the client experience, and what happens on the server? This article helps answer one of the first questions a troubleshooting professional would ask: what does the client “see” from the server?
