Web-Development-with-Blazor-Second-Edition/Chapter15/CustomElements/BlazorCustomElements/Program.cs

using BlazorCustomElements;
using Microsoft.AspNetCore.Components.Web;
using Microsoft.AspNetCore.Components.WebAssembly.Hosting;

var builder = WebAssemblyHostBuilder.CreateDefault(args);

builder.RootComponents.RegisterCustomElement<Counter>("my-blazor-counter");

builder.Services.AddScoped(sp => new HttpClient { BaseAddress = new Uri(builder.HostEnvironment.BaseAddress) });

await builder.Build().RunAsync();