I have .NET 8 Blazor Web App that I've created from the Visual Studio template. It has server and client projects.I need to change the base URL of the application to be /portals/sales. Here are the changes that I've made

Inside Program.cs

app.UseBlazorFrameworkFiles(new PathString("/portals/sales"));app.UseStaticFiles("/portals/sales");app.UseAntiforgery();app.MapRazorComponents<App>()    .AddInteractiveServerRenderMode()    .AddInteractiveWebAssemblyRenderMode(options =>        options.PathPrefix = "/portals/sales")    .AddAdditionalAssemblies(typeof(MK.Sales.Portal.Client._Imports).Assembly);

Inside the App.razor

<!DOCTYPE html><html lang="en"><head><meta charset="utf-8" /><meta name="viewport" content="width=device-width, initial-scale=1.0" /><base href="/portals/sales/" /><link rel="stylesheet" href="bootstrap/bootstrap.min.css" /><link rel="stylesheet" href="app.css" /><link rel="stylesheet" href="MK.Sales.Portal.styles.css" /><link rel="icon" type="image/png" href="favicon.png" /><HeadOutlet /></head><body><Routes /><script src="/portals/sales/_framework/blazor.web.js"></script></body></html>

Inside the server csproj

<PropertyGroup><TargetFramework>net8.0</TargetFramework><Nullable>enable</Nullable><ImplicitUsings>enable</ImplicitUsings><StaticWebAssetBasePath>/portals/sales/</StaticWebAssetBasePath></PropertyGroup>

When I launch the application under https://localhost:5001/portals/sales URL, everything loads correctly, except the _framework/blazor.web.js. I receive 404 and the _framework/blazor.web.js is not loaded.

When I manually load https://localhost:5001/_framework/blazor.web.js, it loads just fine.

I am not sure what am I missing, but Blazor fails to supply the _framework/blazor.web.js from the overridden base path /portals/sales. Instead, the _framework/blazor.web.js remains at the base path.

What should I change in my code to make Blazor supply the _framework/blazor.web.js from the /portals/sales base path?

Update 1

I've uploaded the sample project into my GitHub account and you can find it here

Update 2

It seems this is a bug. I've opened a GitHub issue