With Visual Studio 2008 installed, there is one additional requirement for enabling JavaScript debugging: Internet Explorer must have script debugging enabled. This setting is available via the Tools | Internet Options menu within Internet Explorer. Once the Internet Options dialog box is open, select the Advanced tab and the Disable Script Debugging option is located in the Browsing section. It should not be checked so that it is enabled.
Features
The JavaScript debugger presents many standard debugging features. The following list provides a review of some of these features.
* Breakpoints: Breakpoints allow you to stop code execution at specific points within the source code. JavaScript breakpoints work just like C#/VB breakpoints.
Breakpoints are set/cleared by clicking to the left of the code within the IDE; by using the Debug menu or by using the Breakpoint Context menu available by right-clicking on the code. In addition, you may create conditional breakpoints to allow you to define conditions for the breakpoint, as well as set up a macro to run or a message to print when the breakpoint is triggered. Breakpoints are viewable in the Watch window located by default in the lower left of Visual Studio 2008.
* Call Stack: The Call Stack tab in the lower right of Visual Studio 2008 allows you to view what is being called when the ASP.NET page is loaded/running.
* Locals: The Locals tab in the lower left of Visual Studio 2008 allows you to view the values of variables and objects during script execution. Also, you may change the contents of one of the local variables while the page is running.
* Execute code: The Immediate Window tab in the lower right of Visual Studio 2008 allows you to execute JavaScript code on-the-fly during page execution.
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