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Why is Bundler Excluding .min Files?

Linda HamiltonOriginal: 2024-10-19 15:00:04169browse

Bundler Overlooking .min Files

In the context of ASP.NET MVC4 bundling, a curious issue arises where the bundler excludes files with the .min.js extension from its compilation. To illustrate this, consider the following BundleConfig class:

<code class="c#">public static void RegisterBundles(BundleCollection bundles)
{
    bundles.Add(new ScriptBundle("~/Scripts/jquery")
        .Include("~/Scripts/jquery-1.8.0.js")
        .Include("~/Scripts/jquery.tmpl.min.js"));            
}</code>

In the view, the following code is used to render the bundle:

<code class="html"><head>
@Scripts.Render("~/Scripts/jquery")
</head>
<body>test</body></code>

However, the rendered output only includes the jquery-1.8.0.js file, and jquery.tmpl.min.js is omitted.

Cause

This behavior is not inherent to the bundler configuration itself. It is related to an issue in the Microsoft.AspNet.Web.Optimization package version 1.1.0.

Solution

While the original solution provided involved modifying the IgnoreList configuration, this is no longer applicable in later versions of the optimization package. The latest versions (1.1.3 and above) have resolved this issue.

To resolve this issue and include .min.js files in the bundling process, ensure that you are using the latest version of the Microsoft.AspNet.Web.Optimization package.

Alternative Solution (Outdated)

If you are unable to upgrade to the latest version of the package, you can consider the following hack:

Override the AddDefaultIgnorePatterns method in your BundleConfig class.
Add the following line:

ignoreList.Ignore("*.min.js", OptimizationMode.WhenEnabled);

This will instruct the bundler to ignore .min.js files when optimization is enabled, effectively including them in the bundle.

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