import'dart:html'as html;import'dart:ui'as ui;import'package:flutter/material.dart';voidmain() {runApp(MyApp());}classMyAppextendsStatelessWidget {// This widget is the root of your application.@overrideWidgetbuild(BuildContext context) {returnMaterialApp(      title:'Flutter Demo',      theme:ThemeData(        primarySwatch:Colors.blue,      ),      home:MyHomePage(),    );  }}classMyHomePageextendsStatefulWidget {MyHomePage({Key? key}):super(key: key);@override_MyHomePageStatecreateState()=>_MyHomePageState();}class_MyHomePageStateextendsState<MyHomePage> {@overridevoidinitState() {super.initState();  }var _iframeWidget=HtmlElementView(      key:UniqueKey(),    viewType:'column',  );@overrideWidgetbuild(BuildContext context) {print(' build called');var re= ui.platformViewRegistry.registerViewFactory('column',      (int viewId) {        html.IFrameElement _iframeElement= html.IFrameElement()          ..slot="column"          ..src='https://www.youtube.com/embed/D_mCZlQZg9Y'          ..style.width='100%'          ..style.height='100%';print('plat');return _iframeElement;      },    );returnScaffold(      appBar:AppBar(        title:Text('Demo'),      ),      body:Center(        child:Container(          height:400,          width:500,          child:MediaQuery.of(context).size.width<800?Row(            children: [Container(width:300, height:200, child: _iframeWidget),Text('Some text')            ],          ):Column(            children: [Container(width:300, height:200, child: _iframeWidget),Text('Some text')            ],          ),        ),// This trailing comma makes auto-formatting nicer for build methods.      ),    );  }}