Question

I have an MVC 3 Razor partial page that is dependent on jquery.validate.js and jquery.validate.unobtrusive.js.

Is it possible for the partial page to check whether or not there is, already, a reference to the .js packs?

Since this is a partial page, it’s possible/probable that either the _Layout.cshtml or another included partial page has already referenced the .js packs. To avoid duplicate references to the .js packs, I would like the partial page(s) to be able to determine if it needs to add the reference to the packs or not.

Answer 1

You can check if jQuery and jQuery.validate are defined and load the script if it’s not, but it’s not really worth the effort – browsers are caching js files, so if you have two references, it will only download it once.