asp.net mvc 4: adding parameter to Scripts.Render path

Question

I would like to do the following:

    @Scripts.Render("~/bundles/jquery?version=1"])

the version value has to be dynamic and should match the value defined in a cookie.

How can I add this parameter to Scripts.Render ?

I've tried something like that with jQuery but with no luck:

 @Scripts.Render("~/bundles/jquery?version=" +  $.cookie('version'))

Answer 1

Replace

@Scripts.Render("~/bundles/jquery?version=1"])

with

@{string version = 1}

@Scripts.RenderFormat("<script type=\"text/javascript\" src=\"{0}?nocache="+ version +"\"></script>", "~/bundles/jquery")

as shown in this post: http://www.jomendez.com/2016/05/26/how-to-avoid-js-files-cache-script-bundle-with-razor/

Answer 2

By default MVC optimisations will automatically add a version parameter to the bundle links for release builds but not for debug. E.g. when you deploy your site, the link to /bundles/modernizr becomes something like /bundles/modernizr?v=inCVuEFe6J4Q07A0AcRsbJic and the JavaScript is minified.

If one of the files in the bundle has changed the parameter changes on next deployment, hence linked files are cached by browsers but reloaded from the server when they have changed in a new release.

For easier debugging optimisations are disabled in debug (= no version parameter added and no minified code). If you want to override this you can set the compilation debug attribute to false in web.config, or you can enable optimizations in code, like so:

public static void RegisterBundles(BundleCollection bundles)
{
    bundles.Add(new ScriptBundle("~/bundles/jquery").Include(
             "~/Scripts/jquery-{version}.js"));

    // Code removed for clarity.
   BundleTable.EnableOptimizations = true;
}

For full details see http://www.asp.net/mvc/overview/performance/bundling-and-minification, in particular the sections "Controlling Bundling and Minification" and "Bundle Caching".