Blazor WebAssembly in .NET 8

This project demonstrates how to build an ASP.NET Core hosted Blazor WebAssembly app with .NET 8 and how to upgrade existing apps to take advantage of the latest features.

To upgrade an existing ASP.NET Core hosted Blazor WebAssembly app to .NET 8:

1. Update the project file to target net8.0 and package references to the latest .NET 8 versions (commit).
2. Move content from Client/wwwroot/index.html to Host.razor (commit):
   1. Update script to blazor.web.js.
   2. Replace title tag with HeadOutlet component.
3. Update Client/Program.cs (commit):
   1. Remove builder.RootComponents.Add<HeadOutlet>("head::after").
4. Update Server/Program.cs (commit):
   1. Add builder.Services.AddRazorComponents().AddWebAssemblyComponents().
   2. Remove app.UseBlazorFrameworkFiles().
   3. Replace MapFallbackToFile("index.html") with app.MapRazorComponents<Host>().AddWebAssemblyRenderMode().

To enable prerendering:

1. Update all components to support prerendering from the server (commit).
2. In Host.razor replace the id=app tag with <App @rendermode="@RenderMode.WebAssembly" /> (commit).

Open issues:

• https://github.com/dotnet/aspnetcore/issues/49448
• https://github.com/dotnet/aspnetcore/issues/49056
• https://github.com/dotnet/aspnetcore/issues/49313