This had me stumped for a moment.

All the Javascript was there (linkable from bundle links in the page source), all the files were there, everything worked in dev (doesn’t it always?).

Anyway, if you’re seeing this error in your deployed applications there are a couple of steps to take.

Firstly you should download and install the Visual Studio tool JSLint.VS2012. Then set this up to show warnings and don’t set it up to fail the build. JSLint is not kind and very strict about things (your adherence to BP is your choice but recommended for sure!)

So, you deploy your app and BANG all your lovely JS is twatted. Never fear … pop over to your web apps Global.asax file and in the Application_Start method include this:

BundleTable.EnableOptimizations = true;

So now with this setting set you can launch your app in debug mode with all the Optimizations forced on to test minification and more closely model your testing to the deployed version.

Once you have that working and are seeing the problems more clearly you can start to work through the potential issues using the reports from your new JSLint VS plugin to fix the syntax and other formatting issues.

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