Flutter SDK

dependencies:
  flutter:
    sdk: flutter
  ...
  fingerprint_flutter: ^5.0.0

<head>
  <!-- ... -->
  <script src="assets/packages/fingerprint_flutter/web/index.js" defer></script>
</head>

import 'package:flutter/material.dart';
import 'package:fingerprint_flutter/fingerprint_flutter.dart';

late final Fingerprint fingerprint;

void main() {
  WidgetsFlutterBinding.ensureInitialized();

  fingerprint = Fingerprint(
    apiKey: 'PUBLIC_API_KEY',
    region: Region.us, // or Region.eu, Region.ap
  );

  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  @override
  void initState() {
    super.initState();
    identify();
  }

  Future<void> identify() async {
    try {
      final result = await fingerprint.get();
      debugPrint('Visitor ID: ${result.visitorId}');
      debugPrint('Event ID: ${result.eventId}');
    } on FingerprintError catch (error) {
      debugPrint('Error identifying visitor: $error');
    }
  }

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(home: Scaffold());
  }
}