Add Blazor hosted WASM prerendering steps when using Azure Ad authentication

[Markz878]

Please create documentation that shows the steps to use Blazor Hosted prerendering when using Azure Ad authentication. Currently the error page says that it can't get CascadingAuthenticationState cascading parameter. If I copy the builder.Services.AddMsalAuthentication(options =>
{
builder.Configuration.Bind("AzureAd", options.ProviderOptions.Authentication);
options.ProviderOptions.DefaultAccessTokenScopes.Add("scope_uri");
});
the error page says that it can't perform JS interop during server-side prerendering.
My index page does not even require authorization.

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Document Details

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• ID: 329a19ef-fb46-1f6b-a734-fa1c1334b1e5
• Version Independent ID: 3fa4318a-3c11-c1d8-bf24-ddc6d8441ca2
• Content: Prerender and integrate ASP.NET Core Razor components
• Content Source: aspnetcore/blazor/components/prerendering-and-integration.md
• Product: aspnet-core
• Technology: aspnetcore-blazor
• GitHub Login: @guardrex
• Microsoft Alias: riande

[guardrex]

Hello @Markz878 ... It isn't supported. See the Support prerendering with authentication section of ...

https://docs.microsoft.com/en-us/aspnet/core/blazor/security/webassembly/additional-scenarios?view=aspnetcore-5.0#support-prerendering-with-authentication-1

... which is cross-linked in the Prerendering topic at ...

https://docs.microsoft.com/en-us/aspnet/core/blazor/components/prerendering-and-integration?view=aspnetcore-6.0&pivots=webassembly#additional-blazor-webassembly-resources

I'll add a cross-link to that to the WASM Security Overview topic as well. What I might do in the end is make an INCLUDE file out of that section and place a copy of the entire section in both the Security Additional Scenarios doc and this Prerendering and Integration doc. I'll make a note to myself to check on doing that when I reach that topic for more work later. Thanks for commenting on this.