import 'dart:js_interop';
import 'dart:ui_web' as ui_web;
import 'package:flutter/material.dart';
import 'package:web/web.dart' as web;

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

class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
  return MaterialApp(
    title: 'Platform View Demo',
    home: Scaffold(
      appBar: AppBar(
        title: Text('Platform View Demo'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.spaceEvenly,
          children: [
            BoxWrapper('red'),
            BoxWrapper(null),
            BoxWrapper('blue'),
          ],
        ),
      ),
    ),
  );
}
}

bool isRegistered = false;

class BoxWrapper extends StatelessWidget {
const BoxWrapper(this.cssColor);

final String? cssColor;

void register() {
  if (isRegistered) return;
  isRegistered = true;

  ui_web.platformViewRegistry.registerViewFactory('my-platform-view', (
    id, {
    Object? params,
  }) {
    params as String?;

    final element = web.document.createElement('div'.toJS) as web.HTMLElement;
    element.textContent = 'Platform View'.toJS;
    element.style
      ..lineHeight = '100px'.toJS
      ..fontSize = '24px'.toJS
      ..backgroundColor = (params ?? 'pink').toJS
      ..textAlign = 'center'.toJS;
    return element;
  });
}

@override
Widget build(BuildContext context) {
  register();
  return SizedBox(
    width: 200,
    height: 100,
    child: Card(
      child: HtmlElementView(
        viewType: 'my-platform-view',
        creationParams: cssColor,
      ),
    ),
  );
}
}