import 'package:flutter/material.dart';
                      import 'dart:html' as html;

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

                      class MyApp extends StatelessWidget {
                        @override
                        Widget build(BuildContext context) {
                          return MaterialApp(
                            title: 'TextField Issue',
                            theme: ThemeData(
                              primarySwatch: Colors.purple,
                            ),
                            home: MyHomePage(title: 'TextField Issue'),
                          );
                        }
                      }

                      class MyHomePage extends StatefulWidget {
                        MyHomePage({Key key, this.title}) : super(key: key);
                        final String title;

                        @override
                        _MyHomePageState createState() => _MyHomePageState();
                      }

                      class _MyHomePageState extends State<MyHomePage> {
                        FocusNode _focusNode;

                        @override
                        void initState() {
                          _focusNode = FocusNode(
                            canRequestFocus: true,
                          );
                          _focusNode.addListener(() => print("FocusNode changed"));

                          super.initState();
                        }

                        @override
                        Widget build(BuildContext context) {
                          return Scaffold(
                            appBar: AppBar(
                              title: Text(widget.title),
                            ),
                            body: Center(
                              child: Column(
                                crossAxisAlignment: CrossAxisAlignment.start,
                                children: <Widget>[
                                  Container(
                                    padding: EdgeInsets.all(24),
                                    child: TextFormField(
                                      focusNode: _focusNode,
                                    ),
                                  ),
                                  Container(
                                    padding: EdgeInsets.all(24),
                                    child: Column(
                                      crossAxisAlignment: CrossAxisAlignment.start,
                                      children: [
                                        Text("Demo displaying blur issue on web"),
                                        Text("\n1) Click on the top-most TextFormField above"),
                                        Text("2) Now click on any other area of screen. Basic expected behaviour is textfield must lose focus but it doesnt lose focus."),
                                        Wrap(
                                          children: [
                                            Text("3) The blur was removed in recent PR "),
                                            InkWell(
                                              child: Text('https://github.com/flutter/engine/pull/18743'),
                                              onTap: () {
                                                html.window.open('https://github.com/flutter/engine/pull/18743', '_blank');
                                              },
                                            )
                                          ],
                                        ),
                                        Text("4) This functionality previously worked upto version 1.19.0-4.3.pre (BETA channel)"),
                                      ],
                                    ),
                                  ),
                                ],
                              ),
                            ),
                          );
                        }
                      }