ASP.NET Core MapFallbackToFile is not handling non-existings urls. Only homepage

Question

I am creating Blazor app. If I navigate to homepage - page loads fine, then I navigate into article e.g. localhost/new-article. Next step is page refresh via F5. Page returns 404 not found. My fallback is not picking it up.

Startup.cs

endpoints.MapBlazorHub(blazorOptions =>
{
   blazorOptions.ApplicationMaxBufferSize = blazorOptions.TransportMaxBufferSize = 20 * 1024 * 1024;
});
endpoints.MapRazorPages();
endpoints.MapControllers();
endpoints.MapFallbackToFile("/_Host");

Fallback should take localhost/new-article however I dont know why its not.

_Host.cshtml first line

@page "/"

Answer 1

I believe the issue here is that you need to swap MapFallbackToFile to MapFallbackToPage.