File Upload does not work inside Webview, Flutter

Unfortunately, the webview_flutter plugin does not currently support file uploads. You can track the progress of the feature request here.

In the meantime, you can use either the flutter_inappwebview or flutter_webview_plugin plugins as a workaround.

Using flutter_inappwebview

To use the flutter_inappwebview plugin, add the following to your pubspec.yaml file:

``` dependencies: flutter_inappwebview: ^5.0.0 ```

Then, import the plugin into your Dart code:

``` import 'package:flutter_inappwebview/flutter_inappwebview.dart'; ```

Finally, create an InAppWebView widget and set the onFileUpload property:

``` InAppWebView( onFileUpload: (InAppWebViewController controller, FileUploadRequest fileUploadRequest) async { // Handle file upload request here }, ); ```

Using flutter_webview_plugin

To use the flutter_webview_plugin plugin, add the following to your pubspec.yaml file:

``` dependencies: flutter_webview_plugin: ^0.5.0 ```

Then, import the plugin into your Dart code:

``` import 'package:flutter_webview_plugin/flutter_webview_plugin.dart'; ```

Finally, create a WebView widget and set the onFileUpload property:

``` WebView( onFileUpload: (FileUploadRequest fileUploadRequest) async { // Handle file upload request here }, ); ```