Bundles are registered in the BundleConfig.cs file located in the App_Start folder:

The virtual path of the bundle is passed to the ScriptBundle construct. Specific script files are included in this bundle using the Include method.

The “” expression fills out the rest of the string with the asterisk character as a wildcard. For example, the expression will include two files at once in the bundle: jquery.validate.js and jquery.validate.unobtrusive.js, along with their minimized versions, because their names both start with “jquery.validate”.