Hyperlink widget in Flutter web

main.dart

import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'package:url_launcher/url_launcher.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'PlayGround',
      theme: ThemeData(),
      home: HyperText(),
    );
  }
}

class HyperText extends StatefulWidget {
  @override
  _HyperTextState createState() => _HyperTextState();
}

class _HyperTextState extends State<HyperText> {
  var _hover = false;
  var _hover2 = false;
  late final _recogniser = TapGestureRecognizer()..onTap = _onTap;

  void _onTap() {
    launch('https://www.youtube.com/c/learnfluttercode');
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: DefaultTextStyle(
          style: TextStyle(fontSize: 50, color: Colors.black),
          child: SelectableText.rich(
            TextSpan(
              children: [
                TextSpan(
                  text: 'Like',
                  style: TextStyle(
                    color: _hover ? Colors.white : null,
                    backgroundColor: _hover ? Colors.blue : null,
                  ),
                  mouseCursor: SystemMouseCursors.contextMenu,
                  onEnter: (event) => setState(() => _hover = true),
                  onExit: (event) => setState(() => _hover = false),
                  recognizer: _recogniser,
                ),
                TextSpan(
                  text: ' & ',
                ),
                TextSpan(
                  text: 'Subscribe',
                  style: TextStyle(
                    color: _hover2 ? Colors.white : null,
                    backgroundColor: _hover2 ? Colors.red : null,
                  ),
                  mouseCursor: SystemMouseCursors.wait,
                  onEnter: (event) => setState(() => _hover2 = true),
                  onExit: (event) => setState(() => _hover2 = false),
                  recognizer: _recogniser,
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }
}

pubspec.yaml

name: flutter_playground
description: A new Flutter project.

# The following line prevents the package from being accidentally published to
# pub.dev using `pub publish`. This is preferred for private packages.
publish_to: 'none' # Remove this line if you wish to publish to pub.dev

# The following defines the version and build number for your application.
# A version number is three numbers separated by dots, like 1.2.43
# followed by an optional build number separated by a +.
# Both the version and the builder number may be overridden in flutter
# build by specifying --build-name and --build-number, respectively.
# In Android, build-name is used as versionName while build-number used as versionCode.
# Read more about Android versioning at https://developer.android.com/studio/publish/versioning
# In iOS, build-name is used as CFBundleShortVersionString while build-number used as CFBundleVersion.
# Read more about iOS versioning at
# https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
version: 1.0.0+1

environment:
  sdk: ">=2.12.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter
  cupertino_icons: ^1.0.2
  url_launcher: ^6.0.3

dev_dependencies:
  flutter_test:
    sdk: flutter

# For information on the generic Dart part of this file, see the
# following page: https://dart.dev/tools/pub/pubspec
# The following section is specific to Flutter.
flutter:

  # The following line ensures that the Material Icons font is
  # included with your application, so that you can use the icons in
  # the material Icons class.
  uses-material-design: true
  # To add assets to your application, add an assets section, like this:
  # assets:
  #   - howler.js
  #   - images/a_dot_ham.jpeg
  # An image asset can refer to one or more resolution-specific "variants", see
  # https://flutter.dev/assets-and-images/#resolution-aware.
  # For details regarding adding assets from package dependencies, see
  # https://flutter.dev/assets-and-images/#from-packages
  # To add custom fonts to your application, add a fonts section here,
  # in this "flutter" section. Each entry in this list should have a
  # "family" key with the font family name, and a "fonts" key with a
  # list giving the asset and other descriptors for the font. For
  # example:
  # fonts:
  #   - family: Schyler
  #     fonts:
  #       - asset: fonts/Schyler-Regular.ttf
  #       - asset: fonts/Schyler-Italic.ttf
  #         style: italic
  #   - family: Trajan Pro
  #     fonts:
  #       - asset: fonts/TrajanPro.ttf
  #       - asset: fonts/TrajanPro_Bold.ttf
  #         weight: 700
  #
  # For details regarding fonts from package dependencies,
  # see https://flutter.dev/custom-fonts/#from-packages