Understanding the frontend

It's time to turn our attention to the React frontend. In this section, we'll discover where the single HTML page is that hosts the React app. We'll also understand why it took over a minute to run the app for the first time.

Understanding the frontend entry point

We have a good clue as to where the entry point is from our examination of the Startup class in the ASP.NET Core backend. In the Configure method, the SPA middleware is set up with the source path as ClientApp:

app.UseSpa(spa =>
{
  spa.Options.SourcePath = "ClientApp";

  if (env.IsDevelopment())
  {
    spa.UseReactDevelopmentServer(npmScript: "start");
  }
});

If we look in the ClientApp folder, we&apos...