CssRewriteUrlTransform is not being called

Question

I just created a new MVC 5 app on VS 2013 RTM. For some reason background image url in my CSS files were not being transformed.

So, to debug the issue, I created my custom CssRewriteUrlTransform wrapper. And I found that my breakpoint is not being called.

This is what I have in my BundleConfig.cs

using System.Web.Optimization;  namespace Utilities.Web {     public class BundleConfig     {         private const string JQUERY_CDN_URL = "//code.jquery.com/jquery-1.10.1.min.js";          public static void RegisterBundles(BundleCollection bundles)         {             bundles.UseCdn = true;             BundleTable.EnableOptimizations = true;              bundles.Add(new StyleBundle("~/css/coming-soon")                 .Include("~/Content/Site/coming-soon.css",                     new CssRewriteUrlTransformWrapper()));              bundles.Add(new ScriptBundle("~/js/coming-soon")                 .Include("~/Scripts/jquery.placeholder.js")                 .Include("~/Scripts/Site/coming-soon.js"));              bundles.Add(new ScriptBundle("~/js/jquery", JQUERY_CDN_URL)             {                 CdnFallbackExpression = "window.jQuery"             }.Include("~/Scripts/jquery-{version}.js"));         }     }      public class CssRewriteUrlTransformWrapper : IItemTransform     {         public string Process(string includedVirtualPath, string input)         {             return new CssRewriteUrlTransform().Process(includedVirtualPath, input);         }     } } 

Answer 1

It appears the transform does not run if you have the minified version of the CSS. Remove the .min.css file and it should start working.