Fix Quill init/disposal race (#31)

approach missing dom elements with exception

add another safeguard

Author: pmorong

src/Tizzani.MudBlazor.HtmlEditor/MudHtmlEditor.razor.cs

@@ -114,15 +114,23 @@ protected override async Task OnAfterRenderAsync(bool firstRender)
             _dotNetRef = DotNetObjectReference.Create(this);
 
             await using var module = await JS.InvokeAsync<IJSObjectReference>("import", "./_content/Tizzani.MudBlazor.HtmlEditor/MudHtmlEditor.razor.js");
-            _quill = await module.InvokeAsync<IJSObjectReference>("createQuillInterop", _dotNetRef, _editor, _toolbar, Placeholder);
-
-            await SetHtml(Html);
-
-            StateHasChanged();
+            try
+            {
+                _quill = await module.InvokeAsync<IJSObjectReference>("createQuillInterop", _dotNetRef, _editor, _toolbar, Placeholder);
+                await SetHtml(Html);
+                StateHasChanged();
+            }
+            catch (JSException)
+            {
+                // Creation failed due to missing DOM elements
+            }
+            catch (ObjectDisposedException)
+            {
+                // Component disposed before JS interop completed
+            }
         }
     }
 
-
     [JSInvokable]
     public async void HandleHtmlContentChanged(string html)
     {

src/Tizzani.MudBlazor.HtmlEditor/MudHtmlEditor.razor.js

@@ -17,6 +17,10 @@ if (typeof QuillBlotFormatter !== 'undefined') {
 }
 
 export function createQuillInterop(dotNetRef, editorRef, toolbarRef, placeholder) {
+    if (!editorRef || !editorRef.isConnected || !toolbarRef || !toolbarRef.isConnected) {
+        throw new Error('DOM elements disconnected.');
+    }
+
     const modulesConfig = {
         toolbar: {
                 container: toolbarRef