PersistingRevalidatingAuthenticationStateProvider when global render mode is Auto with prerendering disabled

[danielgreen]

The .NET 8 Blazor Web App template includes the PersistingRevalidatingAuthenticationStateProvider, which sets up a subscription in its constructor.

public PersistingRevalidatingAuthenticationStateProvider(
    ILoggerFactory loggerFactory,
    IServiceScopeFactory serviceScopeFactory,
    PersistentComponentState persistentComponentState,
    IOptions<IdentityOptions> optionsAccessor)
    : base(loggerFactory)
{
    scopeFactory = serviceScopeFactory;
    state = persistentComponentState;
    options = optionsAccessor.Value;

    AuthenticationStateChanged += OnAuthenticationStateChanged;
    subscription = state.RegisterOnPersisting(OnPersistingAsync, RenderMode.InteractiveWebAssembly);
}

I guess the intent of the subscription is for the callback to be invoked when the render mode changes to InteractiveWebAssembly.

But will that work if prerendering is disabled globally i.e. App.Razor contains the following:
<HeadOutlet @rendermode="@RenderModeForPage" />
<Routes @rendermode="@RenderModeForPage" />
private IComponentRenderMode? RenderModeForPage => IsLoginPage ? null : AutoNoPrerender;
private static readonly IComponentRenderMode AutoNoPrerender = new InteractiveAutoRenderMode(prerender: false);

So the actual render mode is not RenderMode.InteractiveWebAssembly, rather it is a custom instance of InteractiveAutoRenderMode.