javascript

I’ve been running into the error message on the right (“Unable to get property ‘style’ of undefined or null reference”) when opening an instance or a new tab of IE10 for the past couple of weeks. It didn’t matter what start page I used, since I tried about:blank, google.com and approximately a dozen more. I found out McAfee SiteAdvisor was the cause of this error pretty quick, but since the company I’m currently in doesn’t allow users to disable SiteAdvisor and I needed IE10 for some testing purposes, I had to find a different solution to the problem.

When debugging JavaScript in an ASP.NET MVC (4) application, it is not always enough to uncheck the ‘Disable script debugging’ checkboxes under ‘Tools’ – ‘Internet Options’ – ‘Advanced’ – ‘Browsing’. JavaScript inside a Razor view (a cshtml file) cannot be debugged from Visual Studio. To debug your JavaScript, move it to a separate .js file and link to that file from your Razor view. This way, breakpoints set in the JavaScript will be hit and you can debug from Visual Studio.