When I set a break-point in my JavaScript code in the browser's debugger provided by its developer tools plug-in, I get a message saying that one or more processes are already attached to this, so it can't set a break-point or debug the code in the browser.
I know that if I run a deployed app, since it is not running in the Visual Studio environment, I can attach it to the browser's debugger.
But how do I debug an app already running in Debug mode inside Visual Studio / Visual Web Developer 2010 Express inside the browser?
You want to use IE developer tools script debugging. Try this:
Goto:
Tools->Internet Options->Advanced->Under "Browsing"-> check both options that starts with "Disable script debugging"
Open IE developer tools
(Press F12 or Tools-> "F12 Developer tools")
Enable script debugging
Open "script" tab and click button "start debugging"
If this works you will be able to debug your JS with IE developer tools.
Note: Why don't you use Chrome. It offers much better developer tools experience than IE.
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