Test

main.dart

import 'package:flutter_web/material.dart';
import 'package:flutter_web_test/flutter_web_test.dart';
import 'package:flutter_web_ui/ui.dart' as ui;

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
Row(
  mainAxisAlignment: MainAxisAlignment.spaceEvenly,
  children: [
    Image.network('https://github.com/flutter/website/blob/master/examples/layout/sizing/images/pic1.jpg'),
    Image.network('https://github.com/flutter/website/blob/master/examples/layout/sizing/images/pic2.jpg'),
    Image.network('https://github.com/flutter/website/blob/master/examples/layout/sizing/images/pic3.jpg'),
  ],
);

test.dart

Future<void> main() async {
  await ui.webOnlyInitializePlatform();
  
  runApp(MyApp());
}