Ajax for Web Application Developers

Chapter 8. Debugging For years now, debugging JavaScript has not been the easiest thing to accomplish because there has been a lack of tools and a lack of native ways of doing so. Of course, there has always been the simple, yet trusty, aler...

The JavaScript onerror Event JavaScript has quite a few built-in events that handle various situations. One that can help quite a bit when debugging our web applications is the onerror event. Using the onerror event allows us to capture all the Ja...

responseText Before we discuss the extensions that we can use for debugging our applications, we will cover one more form of alert debugging. For a quick and dirty look at the response received from an XHR, we could use the responseText property. ...

IE Developer Toolbar The IE Developer Toolbar is quite helpful when debugging web applications in Internet Explorer, especially because the built-in JavaScript error console is incredibly vague and unhelpful. In this chapter, we will discover how ...

Safari Enhancer If you happen to use a Mac and want to debug your JavaScript applications, the Safari Enhancer is a great tool. The Safari Enhancer does exactly what the name implies: It is a great addition to the browser and helps debug JavaScrip...

FireBug I definitely saved the best for last with this extension. FireBug is one of the premier debugging tools for Ajax, JavaScript, CSS, and XHTML applications. It supports error and warning descriptions for JavaScript and CSS. This tool not onl...