import 'dart:html'; // ignore: avoid_web_libraries_in_flutter import 'package:flutter/widgets.dart'; import 'step2/main.dart' as step2; void main() { var page = window.location.search ?? ''; if (page.startsWith('?')) { page = page.substring(1); } switch (page) { case 'step2': step2.main(); break; default: runApp( Directionality( textDirection: TextDirection.ltr, child: Text('Error: unknown page name "$page"'), ), ); } }