ASP.Net MVC Style Bundle Not Including Most Files

Question

Recently, my local copy of a project completely lost most of its styling. Took me a while to figure it out, as most of the styling was done in one file and the rest were min

Answer 1

By default, files with names ending in ".min.css" will only be included in release builds.

The recommended bundle configuration is to only include non-minified .css and .js files, then the .min version will be automatically selected (if it exists) in release builds, i.e. <compilation debug="false">in your Web.config.

You can control this behavior by clearing and then adding ignore rules to the BundleCollection.IgnoreList. An example BundleConfig could look like this:

public static class BundleConfig
{
    public static void RegisterBundles(BundleCollection bundles)
    {
        ConfigureIgnoreList(bundles.IgnoreList);

        // Setup your bundles...
    }

    public static void ConfigureIgnoreList(IgnoreList ignoreList)
    {
        if (ignoreList == null) throw new ArgumentNullException("ignoreList");

        ignoreList.Clear(); // Clear the list, then add the new patterns.

        ignoreList.Ignore("*.intellisense.js");
        ignoreList.Ignore("*-vsdoc.js");
        ignoreList.Ignore("*.debug.js", OptimizationMode.WhenEnabled);
        // ignoreList.Ignore("*.min.js", OptimizationMode.WhenDisabled);
        ignoreList.Ignore("*.min.css", OptimizationMode.WhenDisabled);
    }
}

You can also explicitly enable/disable the optimization by setting BundleTable.EnableOptimizations.