Why is ASP.NET MVC Bundler Excluding My .min.js Files?

Troubleshooting ASP.NET MVC Bundler's Exclusion of .min.js Files

ASP.NET MVC's bundling feature streamlines JavaScript and CSS file management, boosting website performance through combination and compression. However, some users have reported the bundler unexpectedly omitting files ending in ".min.js".

Here are several strategies to resolve this:

1. Rename Files: A straightforward (though potentially tedious) solution is to manually rename all affected ".min.js" files to ".js". This approach is less practical for projects with numerous files.

2. Adjust the Ignore List: The bundler uses an ignore list to specify files to exclude. You can modify this list to include ".min.js" files. The following code snippet demonstrates how:

   <code class="language-csharp"> public static void RegisterBundles(BundleCollection bundles)
    {
        bundles.IgnoreList.Clear();
        AddDefaultIgnorePatterns(bundles.IgnoreList);
        bundles.IgnoreList.Ignore("*.min.js", OptimizationMode.WhenDisabled);
    }</code>

   This code clears the existing ignore list, re-adds default patterns, and then specifically excludes the ".min.js" pattern only* when optimization is disabled. This ensures that minimized files are included during the build process.

3. Software Update: Microsoft has addressed this ".min.js" exclusion issue in later versions of the Microsoft.AspNet.Web.Optimization NuGet package. Updating to the newest version might resolve the problem without requiring code changes.

Choosing the optimal solution depends on your project's size and complexity. Carefully assess the implications of each approach on your application's maintainability and performance before implementing a fix.

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