[BUG]TagExtension targeting div tags causes content skipping

[tjkh]

Describe the bug:

I'm using flutter_html 3.0.0 and encountering an issue where using a TagExtension to target div tags causes content before the div to be skipped and not rendered.

Description of the Issue:

When I define a TagExtension that targets div tags (specifically, div tags with a certain class), the Html widget fails to render any content that appears before the targeted div in the HTML source.

HTML to reproduce the issue:

Html widget configuration:

Create a new Flutter project. Add the flutter_html dependency to your pubspec.yaml. Use the following minimal code to reproduce the issue:

import 'package:flutter/material.dart'; import 'package:flutter_html/flutter_html.dart'; import 'package:html/dom.dart' as dom;

void main() { runApp(MyApp()); }

class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { String htmlContent = """

This is the passage content.

Hover over meTooltip text

""";

return MaterialApp(
  home: Scaffold(
    appBar: AppBar(title: Text('flutter_html Bug')),
    body: Center(
      child: Html(
        data: htmlContent,
        extensions: [TooltipTagExtension()],
      ),
    ),
  ),
);

} }

class TooltipTagExtension extends TagExtension { TooltipTagExtension() : super( tagsToExtend: {'div'}, builder: (context) { final element = context.styledElement?.element; //debugPrint("Element TagName: ${element?.localName} classes: ${element?.classes}"); if (element != null && element.classes.contains('tooltip')) { return Text("Tooltip Placeholder"); // This line causes passage content above to disappear } return SizedBox.shrink(); }, ); } Run the app. Observe that "This is the passage content." is not rendered. If you comment out extensions: [TooltipTagExtension()] the passage content appears. Also, if you change the tag from div to a custom tag (like ), the passage content appears.

Expected behavior:

Expected Behavior:

The Html widget should render all content in the HTML, regardless of the presence of a TagExtension. The TagExtension should only affect the rendering of the specific tag it's targeting.

Actual Behavior:

Content before the targeted div tag is not rendered when the TagExtension is enabled.

Screenshots:

Device details and Flutter/Dart/flutter_html versions:

Windows 11.0 Kotlin plugin: K2 mode GC: G1 Young Generation, G1 Concurrent GC, G1 Old Generation Memory: 2048M Cores: 8 Registry: ide.experimental.ui=true com.android.studio.ml.activeModel=com.android.studio.ml.AidaModel Non-Bundled Plugins: Dart (251.27623.5) io.flutter (87.1)

Stacktrace/Logcat

Additional info:

A picture of a cute animal (not mandatory but encouraged)