Debugging AJAX in Production

摘要

The javascript language has a curious history. Whatrnbegan as a simple tool to let Web developers add dynamic elements to otherwise static Web pages has since evolved into the core of a complex platform for delivering Web-based applications. In the early days,rnthe language's ability to handle failure silently was seen as a benefit. If an image rollover failed, it was better to preserve a seamless Web experience than to present the user with unsightly error dialogs.rnThis tolerance of failure has become a central design principle of modern browsers, where errors are silently logged to a hidden error console. Even when users are aware of the console, they find only a modicum of information, under the assumption that scripts are small and a single message indicating file and line number should be sufficient to identify the source of a problem.