jnschulze / flutter-webview-windows Goto Github PK

function myFunction() {
  var value = {"name":"tashi"}
  window.chrome.webview.postMessage(value);

}

_controller.webMessage.listen((event) {
      print(event);
    });

 case 'webMessageReceived':
              try {
                final message = json.decode(map['value']);
                _webMessageStreamController.add(message);
              } catch (ex) {
                _webMessageStreamController.addError(ex);
              }

Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, 2.2.2, on Microsoft Windows [Version 10.0.19042.1052], locale en-US)
[√] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
[√] Chrome - develop for the web
[√] Visual Studio - develop for Windows (Visual Studio Community 2019 16.10.2)  
[√] Android Studio (version 4.1.0)
[√] Connected device (3 available)

webview_windows_plugin!RGBA_to_BGRA+be [H:\git\FlutterWeb\flutter_webapp_test\windows\flutter\ephemeral\.plugin_symlinks\webview_windows\windows\util\swizzle.h @ 198 + 5]	    00001f7`87c1a070	    00001f7`f0e8b000	    0000000`000002d0	    00000d3`00000500	  H:\git\FlutterWeb\flutter_webapp_test\windows\flutter\ephemeral\.plugin_symlinks\webview_windows\windows\util\swizzle.h @ 198 + 5
webview_windows_plugin!TextureBridge::CopyFrame+43c [H:\git\FlutterWeb\flutter_webapp_test\windows\flutter\ephemeral\.plugin_symlinks\webview_windows\windows\texture_bridge.cc @ 135]	    00001f7`fe2e4d20	    00001f7`fe485af8	    0000000`00000000	    0000209`000004c0	  H:\git\FlutterWeb\flutter_webapp_test\windows\flutter\ephemeral\.plugin_symlinks\webview_windows\windows\texture_bridge.cc @ 135
webview_windows_plugin!TextureBridge::CopyPixelBuffer+cd [H:\git\FlutterWeb\flutter_webapp_test\windows\flutter\ephemeral\.plugin_symlinks\webview_windows\windows\texture_bridge.cc @ 181 + 1a]	    00001f7`fe2e4d20	    0000000`000004c0	    0000000`00000209	    0000000`00000000	  H:\git\FlutterWeb\flutter_webapp_test\windows\flutter\ephemeral\.plugin_symlinks\webview_windows\windows\texture_bridge.cc @ 181 + 1a
webview_windows_plugin!<lambda_5491a75f6462c500903d32c97520d5d0>::operator()+41 [H:\git\FlutterWeb\flutter_webapp_test\windows\flutter\ephemeral\.plugin_symlinks\webview_windows\windows\webview_bridge.cc @ 113]	    00001f7`fdd4e318	    0000000`000004c0	    0000000`00000209	    00001f7`f6c938e0	  H:\git\FlutterWeb\flutter_webapp_test\windows\flutter\ephemeral\.plugin_symlinks\webview_windows\windows\webview_bridge.cc @ 113
webview_windows_plugin!std::invoke<<lambda_5491a75f6462c500903d32c97520d5d0> &,unsigned __int64,unsigned __int64>+2e [H:\Visual Studio 2019\VC\Tools\MSVC\14.29.30037\include\type_traits @ 1610]	    00001f7`fdd4e318	    00000d3`13b5db78	    00000d3`13b5db80	    0007ff8`aefadbe6	  H:\Visual Studio 2019\VC\Tools\MSVC\14.29.30037\include\type_traits @ 1610
webview_windows_plugin!std::_Invoker_ret<FlutterDesktopPixelBuffer const *,0>::_Call<<lambda_5491a75f6462c500903d32c97520d5d0> &,unsigned __int64,unsigned __int64>+28 [H:\Visual Studio 2019\VC\Tools\MSVC\14.29.30037\include\functional @ 754]	    00001f7`fdd4e318	    00000d3`13b5db78	    00000d3`13b5db80	    0000000`00000000	  H:\Visual Studio 2019\VC\Tools\MSVC\14.29.30037\include\functional @ 754
webview_windows_plugin!std::_Func_impl_no_alloc<<lambda_5491a75f6462c500903d32c97520d5d0>,FlutterDesktopPixelBuffer const *,unsigned __int64,unsigned __int64>::_Do_call+4d [H:\Visual Studio 2019\VC\Tools\MSVC\14.29.30037\include\functional @ 921]	    00001f7`fdd4e310	    00000d3`13b5db78	    00000d3`13b5db80	    00000d3`13b5db88	  H:\Visual Studio 2019\VC\Tools\MSVC\14.29.30037\include\functional @ 921
webview_windows_plugin!std::_Func_class<FlutterDesktopPixelBuffer const *,unsigned __int64,unsigned __int64>::operator()+7b [H:\Visual Studio 2019\VC\Tools\MSVC\14.29.30037\include\functional @ 969]	    00001f7`fdd4e310	    0000000`000004c0	    0000000`00000209	    00001f7`e97f0d80	  H:\Visual Studio 2019\VC\Tools\MSVC\14.29.30037\include\functional @ 969
webview_windows_plugin!flutter::PixelBufferTexture::CopyPixelBuffer+32 [H:\git\FlutterWeb\flutter_webapp_test\windows\flutter\ephemeral\cpp_client_wrapper\include\flutter\texture_registrar.h @ 39]	    00001f7`fdd4e310	    0000000`000004c0	    0000000`00000209	    00000d3`13b5dc89	  H:\git\FlutterWeb\flutter_webapp_test\windows\flutter\ephemeral\cpp_client_wrapper\include\flutter\texture_registrar.h @ 39
webview_windows_plugin!<lambda_fe1592742860abf825dc927a0ab45d58>::operator()+37 [H:\git\FlutterWeb\flutter_webapp_test\windows\flutter\ephemeral\cpp_client_wrapper\core_implementations.cc @ 168 + 14]	    0000000`00000000	    0000000`000004c0	    0000000`00000209	    00001f7`fdd4e310	  H:\git\FlutterWeb\flutter_webapp_test\windows\flutter\ephemeral\cpp_client_wrapper\core_implementations.cc @ 168 + 14
webview_windows_plugin!<lambda_fe1592742860abf825dc927a0ab45d58>::<lambda_invoker_cdecl>+2a [H:\git\FlutterWeb\flutter_webapp_test\windows\flutter\ephemeral\cpp_client_wrapper\core_implementations.cc @ 170 + 2a]	    0000000`000004c0	    0000000`00000209	    00001f7`fdd4e310	    0000000`00000000	  H:\git\FlutterWeb\flutter_webapp_test\windows\flutter\ephemeral\cpp_client_wrapper\core_implementations.cc @ 170 + 2a
flutter_windows+6d27	    00001f7`ec53cea0	    0007ff8`af6601a4	    0000000`00000050	    0007ff8`af96f9a7	  
flutter_windows+6cb8	    0000000`00000007	    0007ff8`af9b9900	    00001f7`e9859648	    0000000`00000030	  
flutter_windows!FlutterDesktopTextureRegistrarMarkExternalTextureFrameAvailable+2712	    00001f7`ec56a0f0	    00001f7`f6c74100	    00000d3`13b5e048	    0007ff8`af0f9bd9	  
flutter_windows!FlutterDesktopGetDpiForMonitor+19c3d	    00000d3`13b5e5c8	    00000d3`13b5e700	    0000000`00000018	    0000000`00000088	  
flutter_windows!FlutterDesktopGetDpiForMonitor+2478d	    00000d3`13b5e054	    00000d3`13b5e058	    00000d3`13b5e060	    00000d3`13b5e068	  
flutter_windows!FlutterDesktopGetDpiForMonitor+245d7	    0000000`3f800000	    0000b77`6ffea99f	    00001f7`fe35a0f0	    0000000`00000007	  
flutter_windows!FlutterDesktopGetDpiForMonitor+39a7e6	    3080000`41c00000	    f800000`00000000	    0000b77`6ffea97f	    00001f7`849368f0	  
flutter_windows!FlutterDesktopGetDpiForMonitor+397e0b	    00001f7`ec4f4ec0	    00000d3`13b5e570	    0000000`00000000	    0007ff8`af27e8f3	  
flutter_windows!FlutterDesktopGetDpiForMonitor+39aae9	    0000000`00000005	    0000b77`6ffea8ef	    0000000`00000005	    00000d3`13b5e570	  
flutter_windows!FlutterDesktopGetDpiForMonitor+397e0b	    00001f7`8493aec0	    00000d3`13b5e570	    0007ff8`b00b4398	    00000d3`13b5e2e0	  
flutter_windows!FlutterDesktopGetDpiForMonitor+399afe	    0000b77`6ffeabcf	    00000d3`13b5e2e0	    00000d3`13b5e570	    00001f7`84937a60	  
flutter_windows!FlutterDesktopGetDpiForMonitor+397e0b	    0000000`00000000	    0000000`00000000	    0000000`00000000	    0000000`f89473be	  
flutter_windows!FlutterDesktopGetDpiForMonitor+399afe	    0000000`00000000	    0000000`00000000	    0000b77`6ffeaacf	    00001f7`84937d30	  
flutter_windows!FlutterDesktopGetDpiForMonitor+397e0b	    00001f7`fe46f3a0	    00000d3`13b5e570	    0000000`00000000	    0007ff8`af27e8f3	  
flutter_windows!FlutterDesktopGetDpiForMonitor+39aae9	    0000000`00000000	    0000000`00000000	    0000b77`6ffeaa5f	    00001f7`849371f0	  
flutter_windows!FlutterDesktopGetDpiForMonitor+397e0b	    00001f7`fe010f20	    00000d3`13b5e570	    0000000`00000000	    0007ff8`af27e8f3	  
flutter_windows!FlutterDesktopGetDpiForMonitor+39aae9	    0000000`00000000	    0000000`00000000	    0000b77`6ffeadef	    00001f7`84937160	  
flutter_windows!FlutterDesktopGetDpiForMonitor+397e0b	    00001f7`fe46f100	    00000d3`13b5e570	    0000000`00000000	    0007ff8`af27e8f3	  
flutter_windows!FlutterDesktopGetDpiForMonitor+39aae9	    0000000`00000000	    0007ff8`af27e8f3	    0000000`00000000	    0000000`00000000	  
flutter_windows!FlutterDesktopGetDpiForMonitor+397e0b	    0000000`00000020	    0007ff8`af100c38	    00001f7`e97f0000	    0007ff9`00000004	  
flutter_windows!FlutterDesktopGetDpiForMonitor+398930	    00000d3`13b5f2e8	    0000000`00000002	    00001f7`849b3770	    0007ff8`aef171c2	  
flutter_windows!FlutterDesktopGetDpiForMonitor+395e5b	    00001f7`e97f0000	    0007ff8`aef1745d	    00001f7`f6c12470	    0000000`0000004e	  
flutter_windows!FlutterDesktopGetDpiForMonitor+3a3c84	    0000000`00000000	    0007ff8`af545080	    0000000`00000000	    00000d3`13b5f930	  
flutter_windows!FlutterDesktopGetDpiForMonitor+3a499b	    0000000`f8947371	    0000000`00000000	    0000000`ec54caa0	    0000000`00000000	  
flutter_windows!FlutterDesktopGetDpiForMonitor+3a5683	    00000d3`13b5f7c0	    00000d3`13b5f7c8	    0000000`00000000	    0007ff8`afa88220	  
flutter_windows!FlutterDesktopGetDpiForMonitor+3a41ec	    00001f7`ec43a6b8	    0007ff8`aef1440d	    00000d3`13b5f9c0	    00003cb`03e2c288	  
flutter_windows!FlutterDesktopGetDpiForMonitor+3a3ed7	    0000000`00000002	    00003cb`03e1accc	    0000000`00989680	    0007ff8`af96fe87	  
flutter_windows!FlutterDesktopGetDpiForMonitor+3b5176	    0000000`0000066f	    0007ff9`219f0000	    0000000`00000000	    00001f7`ec4aae70	  
flutter_windows!FlutterDesktopGetDpiForMonitor+2cb1b	    00000d3`13b5faa8	    0007ff8`aef1309f	    0000000`00000000	    0000000`000004a8	  
flutter_windows!FlutterDesktopGetDpiForMonitor+35f66	    00001f7`ec4f5d10	    0000000`00000c84	    0000b77`6ffeb30f	    00000d3`13b5fc30	  
flutter_windows!FlutterDesktopGetDpiForMonitor+2ca38	    0000000`00000000	    0007ff9`21a407b0	    0000000`00000000	    0000000`00000000	  
flutter_windows!FlutterDesktopGetDpiForMonitor+3069f	    0000000`00000000	    00001f7`ec4a68e0	    0000000`00000000	    0000000`00000000	  
flutter_windows!FlutterDesktopGetDpiForMonitor+29c74	    00001f7`ec4f2070	    0000000`00000000	    0000000`00000000	    0000000`00000000	  
flutter_windows!ANGLEResetDisplayPlatform+328394	    0000000`00000000	    0000000`00000000	    0000000`00000000	    0000000`00000000	  
kernel32!BaseThreadInitThunk+14	    0000000`00000000	    0000000`00000000	    0000000`00000000	    0000000`00000000	  
ntdll!RtlUserThreadStart+21	    0000000`00000000	    0000000`00000000	    0000000`00000000	    0000000`00000000	  

C:/dart_templetes/flutter-webview-windows/example/windows/flutter/ephemeral/.plugin_symlinks/webview_windows/windows/third_party/fmt

[ERROR:flutter/lib/ui/ui_dart_state.cc(199)] Unhandled Exception: LateInitializationError: Field '_methodChannel@18215898' has not been initialized.
#0      WebviewController._methodChannel (package:webview_windows/webview_windows.dart)
#1      WebviewController.loadUrl (package:webview_windows/webview_windows.dart:205:11)
#2      _MyAppState.initPlatformState (package:app/main.dart:39:23)

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 2.2.1, on Microsoft Windows [Version 10.0.19042.572], locale en-US)
[!] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
    ✗ Android license status unknown.
      Run `flutter doctor --android-licenses` to accept the SDK licenses.
      See https://flutter.dev/docs/get-started/install/windows#android-setup for more details.
[✓] Chrome - develop for the web
[✓] Visual Studio - develop for Windows (Visual Studio Community 2019 16.8.6)
[✓] Android Studio (version 3.6)
[✓] VS Code (version 1.56.2)
[✓] Connected device (3 available)

import 'package:flutter/material.dart';
import 'dart:async';

import 'package:webview_windows/webview_windows.dart';
import 'package:http/http.dart' as http;

final navigatorKey = GlobalKey<NavigatorState>();

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

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  final _controller = WebviewController();
  final _textController = TextEditingController();
  bool _isWebviewSuspended = false;
  var myUrl =
      'https://2pinyin.net/xx/teste-maio-2021/25-12-2021/1102014241.xhtml';

  @override
  void initState() {
    super.initState();

    initPlatformState();
  }

  Future<void> initPlatformState() async {
    // Optionally initialize the webview environment using
    // a custom user data directory
    // and/or a custom browser executable directory
    // and/or custom chromium command line flags
    //await WebviewController.initializeEnvironment(
    //    additionalArguments: '--show-fps-counter');

    await _controller.initialize();
    _controller.url.listen((url) {
      _textController.text = url;
    });

    await _controller.setBackgroundColor(Colors.transparent);
    await _controller.setPopupWindowPolicy(WebviewPopupWindowPolicy.deny);
    // await _controller.loadUrl('about:blank');
    var response = await http.get(Uri.parse(myUrl));
    _controller.loadStringContent(response.body);

    if (!mounted) return;

    setState(() {});
  }

  Widget compositeView() {
    if (!_controller.value.isInitialized) {
      return const Text(
        'Not Initialized',
        style: TextStyle(
          fontSize: 24.0,
          fontWeight: FontWeight.w900,
        ),
      );
    } else {
      return Padding(
        padding: EdgeInsets.all(20),
        child: Column(
          children: [
            Card(
              elevation: 0,
              child: TextField(
                decoration: InputDecoration(
                    hintText: 'URL',
                    contentPadding: EdgeInsets.all(10.0),
                    suffixIcon: IconButton(
                      icon: Icon(Icons.refresh),
                      onPressed: () {
                        _controller.reload();
                      },
                    )),
                textAlignVertical: TextAlignVertical.center,
                controller: _textController,
                onSubmitted: (val) async {
                  var response = await http.get(Uri.parse(val));
                  _controller.loadStringContent(response.body);
                  // _controller.loadUrl(val);
                },
              ),
            ),
            Expanded(
                child: Card(
                    color: Colors.transparent,
                    elevation: 0,
                    clipBehavior: Clip.antiAliasWithSaveLayer,
                    child: Stack(
                      children: [
                        Webview(
                          _controller,
                          permissionRequested: _onPermissionRequested,
                        ),
                        StreamBuilder<LoadingState>(
                            stream: _controller.loadingState,
                            builder: (context, snapshot) {
                              if (snapshot.hasData &&
                                  snapshot.data == LoadingState.loading) {
                                return LinearProgressIndicator();
                              } else {
                                return SizedBox();
                              }
                            }),
                      ],
                    ))),
          ],
        ),
      );
    }
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      navigatorKey: navigatorKey,
      home: Scaffold(
        floatingActionButton: FloatingActionButton(
          tooltip: _isWebviewSuspended ? 'Resume webview' : 'Suspend webview',
          onPressed: () async {
            if (_isWebviewSuspended) {
              await _controller.resume();
            } else {
              await _controller.suspend();
            }
            setState(() {
              _isWebviewSuspended = !_isWebviewSuspended;
            });
          },
          child: Icon(_isWebviewSuspended ? Icons.play_arrow : Icons.pause),
        ),
        appBar: AppBar(
            title: StreamBuilder<String>(
          stream: _controller.title,
          builder: (context, snapshot) {
            return Text(snapshot.hasData
                ? snapshot.data!
                : 'WebView (Windows) Example');
          },
        )),
        body: Center(
          child: compositeView(),
        ),
      ),
    );
  }

  Future<WebviewPermissionDecision> _onPermissionRequested(
      String url, WebviewPermissionKind kind, bool isUserInitiated) async {
    final decision = await showDialog<WebviewPermissionDecision>(
      context: navigatorKey.currentContext!,
      builder: (BuildContext context) => AlertDialog(
        title: const Text('WebView permission requested'),
        content: Text('WebView has requested permission \'$kind\''),
        actions: <Widget>[
          TextButton(
            onPressed: () =>
                Navigator.pop(context, WebviewPermissionDecision.deny),
            child: const Text('Deny'),
          ),
          TextButton(
            onPressed: () =>
                Navigator.pop(context, WebviewPermissionDecision.allow),
            child: const Text('Allow'),
          ),
        ],
      ),
    );

    return decision ?? WebviewPermissionDecision.none;
  }
}

import 'package:flutter/material.dart';
import 'dart:async';

import 'package:webview_windows/webview_windows.dart';

final navigatorKey = GlobalKey<NavigatorState>();

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

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  final _controller = WebviewController();
  final _textController = TextEditingController();
  bool _isWebviewSuspended = false;

  @override
  void initState() {
    super.initState();

    initPlatformState();
  }

  Future<void> initPlatformState() async {
    // Optionally initialize the webview environment using
    // a custom user data directory
    // and/or a custom browser executable directory
    // and/or custom chromium command line flags
    //await WebviewController.initializeEnvironment(
    //    additionalArguments: '--show-fps-counter');

    await _controller.initialize();
    _controller.url.listen((url) {
      _textController.text = url;
    });

    await _controller.setBackgroundColor(Colors.transparent);
    await _controller.setPopupWindowPolicy(WebviewPopupWindowPolicy.deny);
    await _controller.loadUrl(
        'https://2pinyin.net/xx/teste-maio-2021/25-12-2021/poc_webview_windows.html');

    if (!mounted) return;

    setState(() {});
  }

  Widget compositeView() {
    if (!_controller.value.isInitialized) {
      return const Text(
        'Not Initialized',
        style: TextStyle(
          fontSize: 24.0,
          fontWeight: FontWeight.w900,
        ),
      );
    } else {
      return Padding(
        padding: EdgeInsets.all(20),
        child: Column(
          children: [
            Card(
              elevation: 0,
              child: TextField(
                decoration: InputDecoration(
                    hintText: 'URL',
                    contentPadding: EdgeInsets.all(10.0),
                    suffixIcon: IconButton(
                      icon: Icon(Icons.refresh),
                      onPressed: () {
                        _controller.reload();
                      },
                    )),
                textAlignVertical: TextAlignVertical.center,
                controller: _textController,
                onSubmitted: (val) {
                  _controller.loadUrl(val);
                },
              ),
            ),
            Expanded(
                child: Card(
                    color: Colors.transparent,
                    elevation: 0,
                    clipBehavior: Clip.antiAliasWithSaveLayer,
                    child: Stack(
                      children: [
                        Webview(
                          _controller,
                          permissionRequested: _onPermissionRequested,
                        ),
                        StreamBuilder<LoadingState>(
                            stream: _controller.loadingState,
                            builder: (context, snapshot) {
                              if (snapshot.hasData &&
                                  snapshot.data == LoadingState.loading) {
                                return LinearProgressIndicator();
                              } else {
                                return SizedBox();
                              }
                            }),
                      ],
                    ))),
          ],
        ),
      );
    }
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      navigatorKey: navigatorKey,
      home: Scaffold(
        floatingActionButton: FloatingActionButton(
          tooltip: _isWebviewSuspended ? 'Resume webview' : 'Suspend webview',
          //   onPressed: () async {
          //     if (_isWebviewSuspended) {
          //       await _controller.resume();
          //     } else {
          //       await _controller.suspend();
          //     }
          //     setState(() {
          //       _isWebviewSuspended = !_isWebviewSuspended;
          //     });
          //   },
          //   child: Icon(_isWebviewSuspended ? Icons.play_arrow : Icons.pause),
          // ),

          onPressed: () {
            var string = 'test à ç ã à Á';
            _controller.executeScript('document.getElementById("content").innerHTML="$string"; alert("$string");');
          },
          child: Icon( Icons.send),
        ),
        appBar: AppBar(
            title: StreamBuilder<String>(
          stream: _controller.title,
          builder: (context, snapshot) {
            return Text(snapshot.hasData
                ? snapshot.data!
                : 'WebView (Windows) Example');
          },
        )),
        body: Center(
          child: compositeView(),
        ),
      ),
    );
  }

  Future<WebviewPermissionDecision> _onPermissionRequested(
      String url, WebviewPermissionKind kind, bool isUserInitiated) async {
    final decision = await showDialog<WebviewPermissionDecision>(
      context: navigatorKey.currentContext!,
      builder: (BuildContext context) => AlertDialog(
        title: const Text('WebView permission requested'),
        content: Text('WebView has requested permission \'$kind\''),
        actions: <Widget>[
          TextButton(
            onPressed: () =>
                Navigator.pop(context, WebviewPermissionDecision.deny),
            child: const Text('Deny'),
          ),
          TextButton(
            onPressed: () =>
                Navigator.pop(context, WebviewPermissionDecision.allow),
            child: const Text('Allow'),
          ),
        ],
      ),
    );

    return decision ?? WebviewPermissionDecision.none;
  }
}

C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(145,5): error MSB3073: The command "setlocal [C:\Users\admin\Documents\Projects\canvas\build\windows\plugins\webview_windows\DEPENDENCIES_DOWNLOAD.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(145,5): error MSB3073: ..\..\nuget.exe install Microsoft.Windows.ImplementationLibrary -Version 1.0.210204.1 
-ExcludeVersion -OutputDirectory C:/Users/admin/Documents/Projects/canvas/build/windows/packages [C:\Users\admin\Documents\Projects\canvas\build\windows\plugins\webview_windows\DEPENDENCIES_DOWNLOAD.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(145,5): error MSB3073: if %errorlevel% neq 0 goto :cmEnd [C:\Users\admin\Documents\Projects\canvas\build\windows\plugins\webview_windows\DEPENDENCIES_DOWNLOAD.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(145,5): error MSB3073: ..\..\nuget.exe install Microsoft.Web.WebView2 -Version 1.0.865-prerelease -ExcludeVersion -OutputDirectory C:/Users/admin/Documents/Projects/canvas/build/windows/packages [C:\Users\admin\Documents\Projects\canvas\build\windows\plugins\webview_windows\DEPENDENCIES_DOWNLOAD.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(145,5): error MSB3073: if %errorlevel% neq 0 goto :cmEnd [C:\Users\admin\Documents\Projects\canvas\build\windows\plugins\webview_windows\DEPENDENCIES_DOWNLOAD.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(145,5): error MSB3073: :cmEnd [C:\Users\admin\Documents\Projects\canvas\build\windows\plugins\webview_windows\DEPENDENCIES_DOWNLOAD.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(145,5): error MSB3073: endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone [C:\Users\admin\Documents\Projects\canvas\build\windows\plugins\webview_windows\DEPENDENCIES_DOWNLOAD.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(145,5): error MSB3073: :cmErrorLevel [C:\Users\admin\Documents\Projects\canvas\build\windows\plugins\webview_windows\DEPENDENCIES_DOWNLOAD.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(145,5): error MSB3073: exit /b %1 [C:\Users\admin\Documents\Projects\canvas\build\windows\plugins\webview_windows\DEPENDENCIES_DOWNLOAD.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(145,5): error MSB3073: :cmDone [C:\Users\admin\Documents\Projects\canvas\build\windows\plugins\webview_windows\DEPENDENCIES_DOWNLOAD.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(145,5): error MSB3073: if %errorlevel% neq 0 goto :VCEnd [C:\Users\admin\Documents\Projects\canvas\build\windows\plugins\webview_windows\DEPENDENCIES_DOWNLOAD.vcxproj]
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.CppCommon.targets(145,5): error MSB3073: :VCEnd" exited with code 1. [C:\Users\admin\Documents\Projects\canvas\build\windows\plugins\webview_windows\DEPENDENCIES_DOWNLOAD.vcxproj]
Building Windows application...
Exception: Build process failed.

import 'package:flutter/material.dart';
import 'dart:async';
import 'package:webview_windows/webview_windows.dart';

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

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  int _count = 0;

  @override
  void initState() {
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        floatingActionButton: FloatingActionButton(
          tooltip: 'Reload',
          onPressed: () => setState(() {
            _count++;
          }),
          child: Icon(Icons.refresh),
        ),
        appBar: AppBar(title: Text('WebView (Windows) Example')),
        body: Center(
          child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
            Row(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                MyBrowser(key: GlobalKey(), value: (++_count).toString()),
                MyBrowser(key: GlobalKey(), value: (++_count).toString()),
                MyBrowser(key: GlobalKey(), value: (++_count).toString()),
              ],
            ),
            Row(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                MyBrowser(key: GlobalKey(), value: (++_count).toString()),
                MyBrowser(key: GlobalKey(), value: (++_count).toString()),
                MyBrowser(key: GlobalKey(), value: (++_count).toString()),
              ],
            ),
            Row(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                MyBrowser(key: GlobalKey(), value: (++_count).toString()),
                MyBrowser(key: GlobalKey(), value: (++_count).toString()),
                MyBrowser(key: GlobalKey(), value: (++_count).toString()),
              ],
            ),
            Row(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                MyBrowser(key: GlobalKey(), value: (++_count).toString()),
                MyBrowser(key: GlobalKey(), value: (++_count).toString()),
                MyBrowser(key: GlobalKey(), value: (++_count).toString()),
              ],
            ),
          ]),
        ),
      ),
    );
  }
}

class MyBrowser extends StatefulWidget {
  final String value;
  final double width;
  final double height;

  const MyBrowser({
    Key? key,
    required this.value,
    this.width = 200,
    this.height = 100,
  }) : super(key: key);

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

class _MyBrowserState extends State<MyBrowser> {
  final _controller = WebviewController();

  @override
  void initState() {
    super.initState();
    initPlatformState();
  }

  @override
  void dispose() {
    super.dispose();
    disposePlatformState();
  }

  Future<void> disposePlatformState() async {
    await _controller.dispose();
  }

  Future<void> initPlatformState() async {
    await _controller.initialize();
    await _controller.setBackgroundColor(Colors.transparent);
    await _controller.loadStringContent('<h2>${widget.value}</h2>');

    if (!mounted) return;

    setState(() {});
  }

  @override
  Widget build(BuildContext context) {
    if (!_controller.value.isInitialized) {
      return Container(
        width: widget.width,
        height: widget.height,
        child: Center(child: CircularProgressIndicator()),
      );
    } else {
      return Container(
        padding: EdgeInsets.all(10),
        width: widget.width,
        height: widget.height,
        child: Webview(_controller),
      );
    }
  }
}

C:\Abhilash\Sources\dashboard\dashboard_frontend\windows\flutter\ephemeral\.plugin_symlinks\webview_windows\windows\util/capture.desktop.interop.h(4,10): fatal error C1083: Cannot open include file: 'windows.graphics.capture.interop.h': No such file or directory [C:\Abhilash\Sources\dashboard\dashboard_frontend\build\windows\plugins\webview_windows\webview_windows_plugin.vcxproj]
C:\Program Files (x86)\Windows Kits\10\Include\10.0.17763.0\cppwinrt\winrt/base.h(6508,17): error C2220: the following warning is treated as an error [C:\Abhilash\Sources\dashboard\dashboard_frontend\build\windows\plugins\webview_windows\webview_windows_plugin.vcxproj]
C:\Program Files (x86)\Windows Kits\10\Include\10.0.17763.0\cppwinrt\winrt/base.h(6508,17): warning C5205: delete of an abstract class 'winrt::impl::implements_delegate<winrt::Windows::UI::Core::DispatchedHandler,H>' that has a non-virtual destructor results in undefined behavior [C:\Abhilash\Sources\dashboard\dashboard_frontend\build\windows\plugins\webview_windows\webview_windows_plugin.vcxproj]
C:\Program Files (x86)\Windows Kits\10\Include\10.0.17763.0\cppwinrt\winrt/base.h(6508,17): error C2220: the following warning is treated as an error [C:\Abhilash\Sources\dashboard\dashboard_frontend\build\windows\plugins\webview_windows\webview_windows_plugin.vcxproj]
C:\Program Files (x86)\Windows Kits\10\Include\10.0.17763.0\cppwinrt\winrt/base.h(6508,17): warning C5205: delete of an abstract class 'winrt::impl::implements_delegate<winrt::Windows::UI::Core::DispatchedHandler,H>' that has a non-virtual destructor results in undefined behavior [C:\Abhilash\Sources\dashboard\dashboard_frontend\build\windows\plugins\webview_windows\webview_windows_plugin.vcxproj]
C:\Abhilash\Sources\dashboard\dashboard_frontend\windows\flutter\ephemeral\.plugin_symlinks\webview_windows\windows\util/capture.desktop.interop.h(4,10): fatal error C1083: Cannot open include file: 'windows.graphics.capture.interop.h': No such file or directory [C:\Abhilash\Sources\dashboard\dashboard_frontend\build\windows\plugins\webview_windows\webview_windows_plugin.vcxproj]
C:\Abhilash\Sources\dashboard\dashboard_frontend\windows\flutter\ephemeral\.plugin_symlinks\webview_windows\windows\util/capture.desktop.interop.h(4,10): fatal error C1083: Cannot open include file: 'windows.graphics.capture.interop.h': No such file or directory [C:\Abhilash\Sources\dashboard\dashboard_frontend\build\windows\plugins\webview_windows\webview_windows_plugin.vcxproj]

return WebView(
 ...
    onPageFinished: (result) async {
      String html =
      (await _mobileWebViewController!.evaluateJavascript(
          "window.document.getElementsByTagName('html')[0].outerHTML;"));
      //read(html);
    },
 ...
}