Search and replace in Javascript before bundling

Question

Summary

Is there any way to make the bundling and minification process in an ASP.NET MVC-application perform a \"search and replace\" inside the script files before it

Answer 1

As Vladimir said, you can create your own Bundle transformation, simply implementing IBundleTransform. I have written a blog post about bundling and minifying Coffeescripts that can point you in the right direction : http://tallmaris.com/advanced-bundling-and-minification-of-coffeescripts-in-mvc4/

In summary, create a custom transform like this:

public class MultiLanguageBundler : IBundleTransform
{
    public void Process(BundleContext context, BundleResponse response)
    {
        foreach (var file in response.Files)
        {
            using (var reader = new StreamReader(file.FullName))
            {
                // "ReplaceLanguageStrings" contains the search/replace logic
                compiled += ReplaceLanguageStrings(reader.ReadToEnd());
                reader.Close();
            }
        }
        response.Content = compiled;
        response.ContentType = "text/javascript";
    }
}

Then in your BundleConfig:

var myBundle = new Bundle("~/Scripts/localised")
                   .Include("~/JsToLocalise/*.js"); //your JS location here, or include one by one if order is important.
myBundle.Transforms.Add(new MultiLanguageBundler());
myBundle.Transforms.Add(new JsMinify());
bundles.Add(myBundle);

You may need to tweak a few things but let me know if it helps you.

Answer 2

Implement IBundleTransform interface. Example can be found here.