ersatztv/ErsatzTV/Extensions/NavigationManagerExtensions.cs

using System;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Components;
using Microsoft.JSInterop;

namespace ErsatzTV.Extensions
{
    public static class NavigationManagerExtensions
    {
        public static ValueTask NavigateToFragmentAsync(this NavigationManager navigationManager, IJSRuntime jSRuntime)
        {
            Uri uri = navigationManager.ToAbsoluteUri(navigationManager.Uri);

            if (uri.Fragment.Length == 0)
            {
                return default;
            }

            return jSRuntime.InvokeVoidAsync("blazorHelpers.scrollToFragment", uri.Fragment.Substring(1));
        }
    }
}