Resolving js and css urls affected by app.Map in ASP.NET 5 - asp.net-core

Question

I am implementing multi-tenancy based on the first folder segment of the request url.
As such I'm configuring each tenant separately by branching with IApplicationBuilder like this:
PathString path = new PathString("/somefolder");
app.Map(path,
branchApp =>
{
// code goes here to configure the branch
}
as a result of this if my view has a link with url /Home/About for example, it automatically is adjusted to be relative to the folder I branched on when I visit /somefolder, ie the links change to /somefolder/Home/About, somefolder/Home/Contact etc
This was kind of unexpected to me but actually helpful.
But also if my view has
<link rel="stylesheet" href="~/css/site.css" />
<script src="~/js/lib/jquery/dist/jquery.js"></script>
those now resolve to /somefolder/css/site.css and /somefolder/js/lib/jquery/dist/jquery.js
which is not what I want.
Is there some way I can change this behavior for js and css but keep it for navigation links?

Answer 1

No, you can't. At least, not easily: when using app.Map, it automatically sets HttpContext.Request.PathBase with the path parameter you specified, which causes the exact behavior you're seeing (it's basically a "virtual directory" equivalent).
The best option is to stop using virtual path links (~/) and replace them by standard root-relative links (/), that are not processed by Razor and MVC.
<link rel="stylesheet" href="/css/site.css" />
<script src="/js/lib/jquery/dist/jquery.js"></script>