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Asked: 2026-05-11T11:59:59+00:00

Consider the following trivial HTML page that throws an error: <html><head><script> throw new Error(‘oops’);

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Consider the following trivial HTML page that throws an error:

<html><head><script>   throw new Error('oops');   alert('should not reach here'); </script></head></html>

The user I am logged into Vista with is a member of both the Administrators and Debugger Users groups.

If I run Internet Explorer on Vista as an administrator (right click → Run as administrator) and load the page I get the following error prompt:

alt text

Clicking Yes displays the following prompt from which I can successfully open Visual Studio 2008 and debug the problem:

alt text http://img227.imageshack.us/img227/9751/debuguy3.png

If I instead launch Internet Explorer normally and load the page no error prompt is displayed (or any indication of the error for that matter) and I can’t jump in and debug the problem.

I’ve tried making the site the page is served from a trusted site in Internet Explorer. This causes the error prompt to be displayed for the page, but clicking yes doesn’t do anything and the browser just sits and hangs.

Similarly I can only successfully attach to an existing Internet Explorer process from Visual Studio to debug JavaScript if Internet Explorer was run as an administrator.

How can I successfully debug JavaScript with Visual Studio when running Internet Explorer with UAC enabled?

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1 Answer

  1. Internet Explorer 8 comes with a built in debugger that neatly sidesteps this problem. This should reduce the time I need to spend debugging in earlier versions of Internet Explorer, so I can live with this annoyance until those versions go the way of the Dodo 🙂

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