Flutter says ImageElement isn't defined - flutter

Question

Tried to run the application using flutter run -d linux command.
I have imported 'dart:html' and have it in pubspec.yaml, also did pub clean and pub get:
dependencies:
flutter:
sdk: flutter
http: ^0.13.5
# The following adds the Cupertino Icons font to your application.
# Use with the CupertinoIcons class for iOS style icons.
cupertino_icons: ^1.0.2
html: ^0.15.1
flutter_image: ^4.1.4
webview_flutter: ^3.0.4
widgets: ^1.4.5
But flutter gives an error:
ERROR: lib/main.dart:21:12: Error: The method 'ImageElement' isn't defined for the class 'MyApp'.
ERROR: - 'MyApp' is from 'package:test/main.dart' ('lib/main.dart').
ERROR: Try correcting the name to the name of an existing method, or defining a method named 'ImageElement'.
ERROR: (int _) => ImageElement()..src = imageUrl,
This is the peace of code with ImageElement:
import 'dart:html';
import 'package:flutter/material.dart';
//import 'dart:ui' as ui;
import 'dart:ui' as ui;
const Color darkBlue = Color.fromARGB(255, 18, 32, 47);
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
String imageUrl =
"https://www.nasa.gov/centers/jpl/images/content/756230main_pia08329-full.jpg";
ui.platformViewRegistry.registerViewFactory(
imageUrl,
(int _) => ImageElement()..src = imageUrl,
);
return HtmlElementView(viewType: imageUrl);
}
}