@inject MyState State
@implements IDisposable
@inject IJSRuntime JS;

<p>Got @State.Names.Count</p>

@code {
  protected override void OnInitialized()
  {
    State.OnChange += StateHasChanged;
  }

  public void Dispose()
  {
    JS.InvokeVoidAsync("alert", "Disposed");
    State.OnChange -= StateHasChanged;
  }
}