I had the same problem with a VS2010 project I opened in VS2012. The Microsoft.AspNet.Web.Optimization package was missing so I just needed to download it using Nuget Package Manager. You can run in the console: Install-Package Microsoft.AspNet.Web.Optimization
The issue is most likely that the icons/images in the css files are using relative paths, so if your bundle doesn’t live in the same app relative path as your unbundled css files, they become broken links. We have rebasing urls in css on our todo list, but for now, the easist thing to do … Read more
If you upgrade to the 1.1-alpha1 release, you can just add the async attribute to the tag format either via: Scripts.DefaultTagFormat = @”<script src=””{0}”” async></script>” or passing it where you want the async tag Use following instead of Scripts.Render(“~/bundles/jquery”) Scripts.RenderFormat(@”<script src=””{0}”” async></script>”, “~/bundles/jquery”)
Information about ASP.NET MVC bundling is here: http://weblogs.asp.net/scottgu/archive/2011/11/27/new-bundling-and-minification-support-asp-net-4-5-series.aspx. ASP.NET is adding a feature that makes it easy to “bundle” or “combine” multiple CSS and JavaScript files into fewer HTTP requests. This causes the browser to request a lot fewer files and in turn reduces the time it takes to fetch them. The next release of … Read more
I’ve found a more elegant solution. I’m using the Styles.RenderFormat(format, bundle). I have a BundlesFormats class with a property called PRINT and I use it like so: public class BundlesFormats { public const string PRINT = @”<link href=””{0}”” rel=””stylesheet”” type=””text/css”” media=””print”” />”; } And in the cshtml: @Styles.RenderFormat(BundlesFormats.PRINT, “~/bundles/Content/print”)
I imagine the problem is you putting the bundle at a virtual URL that actually exists, but is a directory. MVC is making a virtual file from your bundle and serving it up from the path you specify as the bundle path. The correct solution for that problem is to use a bundle path that … Read more
There are a few issues here: The css issue is due to including the jquery.ui.all.css, as the default minifier doesn’t support following imports, and this is not what you want to do anyways as it would double include all of the jquery ui css files. So what you want to do instead is not use … Read more
I’ve written a quick blog post about Using LESS CSS With MVC4 Web Optimization. It basically boils down to using the BundleTransformer.Less Nuget Package and changing up your BundleConfig.cs. Tested with bootstrap. EDIT: Should mention the reason I say this, is I also ran into the @import directory structure issue, and this library handles it … Read more
Why can’t you bundle them and place them are the CDN? It should hardly be a decision of one or the other? If you have to choose one or the other, it depends on how many .js files you are including. For a small number of files, I’d suggest that a CDN would be quicker, … Read more
UPDATE: This is a new blog post which also talks about this more: ASP.NET article Basically webforms + bundling looks like this due to a bunch of legacy behavior that we weren’t able to change in scriptmanager. In regards to your specific questions: Basically this is so deduping works correctly, script manager has a limitation … Read more