Do single rendering of FocusTrap after SetTitle

src/Blazored.Modal/BlazoredModalInstance.razor.cs

@@ -79,6 +79,12 @@ protected override async Task OnAfterRenderAsync(bool firstRender)
     public void SetTitle(string title)
     {
         Title = title;
+
+        if (FocusTrap is not null)
+        {
+            FocusTrap.SetRenderRequest();
+        }
+
         StateHasChanged();
     }
 

src/Blazored.Modal/FocusTrap.razor

@@ -13,12 +13,21 @@
     private ElementReference _endFirst;
     private ElementReference _endSecond;
     private bool _shiftPressed;
+    private bool _renderRequest;
 
     [Parameter] public RenderFragment ChildContent { get; set; } = default!;
     [Parameter] public bool IsActive { get; set; }
 
     protected override bool ShouldRender()
-        => false;
+    {
+        if (_renderRequest)
+        {
+            _renderRequest = false;
+            return true;
+        }
+
+        return false;
+    }
 
     protected override async Task OnAfterRenderAsync(bool firstRender)
     {
@@ -54,4 +63,7 @@
             _shiftPressed = args.ShiftKey;
         }
     }
+
+    internal void SetRenderRequest()
+        => _renderRequest = true;
 }