FilePickerWeb breaks Android app and is the only thing that works for web

[rickyManalo]

Before creating an issue, make sure that you are on the latest file_picker version and that there aren't already any similar opened inssues. Also, check if it isn't described on the Wiki, specially on Troubleshooting page.

Also, sometimes a simple flutter clean and flutter build again with latest file_picker version, may end up by fixing cached issues, so I encourage you to first do so.

Describe the bug I'm currently trying to implement an image picker for my app. I was already able to make file_picker work for Android, but it doesn't work for web. I found out about FilePickerWeb and it does seems to work on web, but it also seem like it causes issues for Android.

If I use just FilePicker for web, I would get this error: Uncaught LateInitializationError: Field '_instance' has not been initialized.

If I use FilePickerWeb for web, I would get tons of error when building the app. .I added them below

Platform

• [ x] Android
• [ ] iOS
• [ x] Web
• [ ] Desktop

Platform OS version What version did it happen? ^8.0.7

How are you picking? List targetImgExtensionArr = ['jpg', 'jpeg', 'png', 'webp', 'gif', 'bmp']; if(kIsWeb){ result = await FilePickerWeb.platform.pickFiles( type: FileType.custom, allowMultiple: false, allowedExtensions: targetImgExtensionArr, ); }else if(Platform.isAndroid || Platform.isIOS){ result = await FilePicker.platform.pickFiles( type: FileType.custom, allowMultiple: false, allowedExtensions: targetImgExtensionArr, ); }

Details to reproduce the issue Provide all the details to reproduce the issue.

Error Log

/C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/csscascade.dart:36:40: Error: Type 'JSObject' not found. extension type CSSLayerStatementRule.(JSObject _) ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/css_cascade.dart:37:25: Error: Type 'JSObject' not found. implements CSSRule, JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/css_cascade.dart:38:20: Error: Type 'JSString' not found. external JSArray get nameList; ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/css_cascade.dart:38:12: Error: Type 'JSArray' not found. external JSArray get nameList; ^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/css_cascade.dart:22:33: Error: The type 'JSObject' can't be implemented by an extension type. implements CSSGroupingRule, JSObject { ^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/css_cascade.dart:37:25: Error: The type 'JSObject' can't be implemented by an extension type. implements CSSRule, JSObject { ^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/css_cascade.dart:11:2: Error: Couldn't find constructor 'JS'. @JS() ^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/csscascade.dart:21:36: Error: 'JSObject' isn't a type. extension type CSSLayerBlockRule.(JSObject _) ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/csscascade.dart:36:40: Error: 'JSObject' isn't a type. extension type CSSLayerStatementRule.(JSObject _) ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/css_animations_2.dart:14:8: Error: Dart library 'dart:js_interop' is not available on this platform. import 'dart:js_interop'; ^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/css_animations2.dart:20:31: Error: Type 'JSObject' not found. extension type CSSAnimation.(JSObject _) implements Animation, JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/css_animations2.dart:20:65: Error: Type 'JSObject' not found. extension type CSSAnimation.(JSObject _) implements Animation, JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/css_animations2.dart:20:65: Error: The type 'JSObject' can't be implemented by an extension type. extension type CSSAnimation.(JSObject _) implements Animation, JSObject { ^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/css_animations_2.dart:11:2: Error: Couldn't find constructor 'JS'. @JS() ^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/css_animations2.dart:20:31: Error: 'JSObject' isn't a type. extension type CSSAnimation.(JSObject _) implements Animation, JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/css_animations.dart:14:8: Error: Dart library 'dart:js_interop' is not available on this platform. import 'dart:js_interop'; ^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/cssanimations.dart:22:33: Error: Type 'JSObject' not found. extension type AnimationEvent.(JSObject _) implements Event, JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/cssanimations.dart:22:63: Error: Type 'JSObject' not found. extension type AnimationEvent.(JSObject _) implements Event, JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/cssanimations.dart:32:37: Error: Type 'JSObject' not found. extension type AnimationEventInit.(JSObject _) implements EventInit, JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/cssanimations.dart:32:71: Error: Type 'JSObject' not found. extension type AnimationEventInit.(JSObject _) implements EventInit, JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/cssanimations.dart:51:34: Error: Type 'JSObject' not found. extension type CSSKeyframeRule.(JSObject _) implements CSSRule, JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/cssanimations.dart:51:66: Error: Type 'JSObject' not found. extension type CSSKeyframeRule.(JSObject _) implements CSSRule, JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/cssanimations.dart:61:35: Error: Type 'JSObject' not found. extension type CSSKeyframesRule.(JSObject _) implements CSSRule, JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/cssanimations.dart:61:67: Error: Type 'JSObject' not found. extension type CSSKeyframesRule.(JSObject _) implements CSSRule, JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/cssanimations.dart:22:63: Error: The type 'JSObject' can't be implemented by an extension type. extension type AnimationEvent.(JSObject _) implements Event, JSObject { ^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/cssanimations.dart:32:71: Error: The type 'JSObject' can't be implemented by an extension type. extension type AnimationEventInit.(JSObject _) implements EventInit, JSObject { ^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/cssanimations.dart:51:66: Error: The type 'JSObject' can't be implemented by an extension type. extension type CSSKeyframeRule.(JSObject _) implements CSSRule, JSObject { ^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/cssanimations.dart:61:67: Error: The type 'JSObject' can't be implemented by an extension type. extension type CSSKeyframesRule.(JSObject _) implements CSSRule, JSObject { ^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/css_animations.dart:11:2: Error: Couldn't find constructor 'JS'. @JS() ^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/cssanimations.dart:22:33: Error: 'JSObject' isn't a type. extension type AnimationEvent.(JSObject _) implements Event, JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/cssanimations.dart:32:37: Error: 'JSObject' isn't a type. extension type AnimationEventInit.(JSObject _) implements EventInit, JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/cssanimations.dart:51:34: Error: 'JSObject' isn't a type. extension type CSSKeyframeRule.(JSObject _) implements CSSRule, JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/cssanimations.dart:61:35: Error: 'JSObject' isn't a type. extension type CSSKeyframesRule.(JSObject _) implements CSSRule, JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/csp.dart:14:8: Error: Dart library 'dart:js_interop' is not available on this platform. import 'dart:jsinterop'; ^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/csp.dart:33:41: Error: Type 'JSObject' not found. extension type CSPViolationReportBody.(JSObject ) ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/csp.dart:34:28: Error: Type 'JSObject' not found. implements ReportBody, JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/csp.dart:35:12: Error: Type 'JSObject' not found. external JSObject toJSON(); ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/csp.dart:52:47: Error: Type 'JSObject' not found. extension type SecurityPolicyViolationEvent.(JSObject ) ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/csp.dart:53:23: Error: Type 'JSObject' not found. implements Event, JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/csp.dart:72:51: Error: Type 'JSObject' not found. extension type SecurityPolicyViolationEventInit.(JSObject ) ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/csp.dart:73:27: Error: Type 'JSObject' not found. implements EventInit, JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/csp.dart:34:28: Error: The type 'JSObject' can't be implemented by an extension type. implements ReportBody, JSObject { ^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/csp.dart:53:23: Error: The type 'JSObject' can't be implemented by an extension type. implements Event, JSObject { ^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/csp.dart:73:27: Error: The type 'JSObject' can't be implemented by an extension type. implements EventInit, JSObject { ^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/csp.dart:11:2: Error: Couldn't find constructor 'JS'. @JS() ^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/csp.dart:33:41: Error: 'JSObject' isn't a type. extension type CSPViolationReportBody.(JSObject ) ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/csp.dart:52:47: Error: 'JSObject' isn't a type. extension type SecurityPolicyViolationEvent.(JSObject ) ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/csp.dart:72:51: Error: 'JSObject' isn't a type. extension type SecurityPolicyViolationEventInit.(JSObject _) ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:14:8: Error: Dart library 'dart:js_interop' is not available on this platform. import 'dart:jsinterop'; ^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:43:27: Error: Type 'JSObject' not found. extension type $Console.(JSObject ) implements JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:43:50: Error: Type 'JSObject' not found. extension type $Console.(JSObject ) implements JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:46:5: Error: Type 'JSAny' not found. JSAny? data, [ ^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:50:23: Error: Type 'JSAny' not found. external void debug(JSAny? data); ^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:51:23: Error: Type 'JSAny' not found. external void error(JSAny? data); ^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:52:22: Error: Type 'JSAny' not found. external void info(JSAny? data); ^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:53:21: Error: Type 'JSAny' not found. external void log(JSAny? data); ^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:55:5: Error: Type 'JSAny' not found. JSAny? tabularData, ^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:56:13: Error: Type 'JSString' not found. JSArray properties, ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:56:5: Error: Type 'JSArray' not found. JSArray properties, ^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:58:23: Error: Type 'JSAny' not found. external void trace(JSAny? data); ^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:59:22: Error: Type 'JSAny' not found. external void warn(JSAny? data); ^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:61:5: Error: Type 'JSAny' not found. JSAny? item, ^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:62:5: Error: Type 'JSObject' not found. JSObject? options, ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:64:24: Error: Type 'JSAny' not found. external void dirxml(JSAny? data); ^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:67:23: Error: Type 'JSAny' not found. external void group(JSAny? data); ^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:68:32: Error: Type 'JSAny' not found. external void groupCollapsed(JSAny? data); ^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:72:5: Error: Type 'JSAny' not found. JSAny? data, [ ^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:43:50: Error: The type 'JSObject' can't be implemented by an extension type. extension type $Console.(JSObject ) implements JSObject { ^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:11:2: Error: Couldn't find constructor 'JS'. @JS() ^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:16:2: Error: Couldn't find constructor 'JS'. @JS() ^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:42:2: Error: Couldn't find constructor 'JS'. @JS('console') ^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:44:4: Error: Couldn't find constructor 'JS'. @JS('assert') ^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:43:27: Error: 'JSObject' isn't a type. extension type $Console.(JSObject _) implements JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:46:5: Error: 'JSAny' isn't a type. JSAny? data, [ ^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:50:23: Error: 'JSAny' isn't a type. external void debug(JSAny? data); ^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:51:23: Error: 'JSAny' isn't a type. external void error(JSAny? data); ^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:52:22: Error: 'JSAny' isn't a type. external void info(JSAny? data); ^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:53:21: Error: 'JSAny' isn't a type. external void log(JSAny? data); ^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:55:5: Error: 'JSAny' isn't a type. JSAny? tabularData, ^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:56:13: Error: 'JSString' isn't a type. JSArray properties, ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:56:5: Error: 'JSArray' isn't a type. JSArray properties, ^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:58:23: Error: 'JSAny' isn't a type. external void trace(JSAny? data); ^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:59:22: Error: 'JSAny' isn't a type. external void warn(JSAny? data); ^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:61:5: Error: 'JSAny' isn't a type. JSAny? item, ^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:62:5: Error: 'JSObject' isn't a type. JSObject? options, ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:64:24: Error: 'JSAny' isn't a type. external void dirxml(JSAny? data); ^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:67:23: Error: 'JSAny' isn't a type. external void group(JSAny? data); ^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:68:32: Error: 'JSAny' isn't a type. external void groupCollapsed(JSAny? data); ^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/console.dart:72:5: Error: 'JSAny' isn't a type. JSAny? data, [ ^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/compression.dart:14:8: Error: Dart library 'dart:js_interop' is not available on this platform. import 'dart:jsinterop'; ^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/compression.dart:22:36: Error: Type 'JSObject' not found. extension type CompressionStream.(JSObject ) implements JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/compression.dart:22:59: Error: Type 'JSObject' not found. extension type CompressionStream.(JSObject ) implements JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/compression.dart:31:38: Error: Type 'JSObject' not found. extension type DecompressionStream.(JSObject ) implements JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/compression.dart:31:61: Error: Type 'JSObject' not found. extension type DecompressionStream.(JSObject ) implements JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/compression.dart:22:59: Error: The type 'JSObject' can't be implemented by an extension type. extension type CompressionStream.(JSObject ) implements JSObject { ^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/compression.dart:31:61: Error: The type 'JSObject' can't be implemented by an extension type. extension type DecompressionStream.(JSObject ) implements JSObject { ^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/compression.dart:11:2: Error: Couldn't find constructor 'JS'. @JS() ^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/compression.dart:22:36: Error: 'JSObject' isn't a type. extension type CompressionStream.(JSObject ) implements JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/compression.dart:31:38: Error: 'JSObject' isn't a type. extension type DecompressionStream.(JSObject _) implements JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/angle_instanced_arrays.dart:14:8: Error: Dart library 'dart:js_interop' is not available on this platform. import 'dart:js_interop'; ^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/angle_instanced_arrays.dart:38:41: Error: Type 'JSObject' not found. extension type ANGLE_instancedarrays.(JSObject _) implements JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/angle_instanced_arrays.dart:38:64: Error: Type 'JSObject' not found. extension type ANGLE_instancedarrays.(JSObject _) implements JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/angle_instanced_arrays.dart:38:64: Error: The type 'JSObject' can't be implemented by an extension type. extension type ANGLE_instancedarrays.(JSObject _) implements JSObject { ^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/angle_instanced_arrays.dart:11:2: Error: Couldn't find constructor 'JS'. @JS() ^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/dom/angle_instanced_arrays.dart:38:41: Error: 'JSObject' isn't a type. extension type ANGLE_instancedarrays.(JSObject _) implements JSObject { ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/helpers/events/providers.dart:5:8: Error: Dart library 'dart:js_interop' is not available on this platform. import 'dart:js_interop'; ^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/helpers/events/providers.dart:6:8: Error: Dart library 'dart:js_interop_unsafe' is not available on this platform. import 'dart:js_interop_unsafe'; ^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/helpers/events/providers.dart:615:25: Error: 'JSObject' isn't a type. final jsObject = e as JSObject; ^^^^^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/helpers/events/providers.dart:618:47: Error: The getter 'toJS' isn't defined for the class 'String'. Try correcting the name to the name of an existing getter, or defining a getter or field named 'toJS'. } else if (jsObject.hasProperty('mozHidden'.toJS).toDart) { ^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/helpers/events/providers.dart:620:46: Error: The getter 'toJS' isn't defined for the class 'String'. Try correcting the name to the name of an existing getter, or defining a getter or field named 'toJS'. } else if (jsObject.hasProperty('msHidden'.toJS).toDart) { ^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/helpers/events/providers.dart:622:50: Error: The getter 'toJS' isn't defined for the class 'String'. Try correcting the name to the name of an existing getter, or defining a getter or field named 'toJS'. } else if (jsObject.hasProperty('webkitHidden'.toJS).toDart) { ^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/helpers/extensions.dart:24:8: Error: Dart library 'dart:js_interop' is not available on this platform. import 'dart:js_interop'; ^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/helpers/extensions.dart:35:69: Error: The getter 'toJS' isn't defined for the class 'num'. Try correcting the name to the name of an existing getter, or defining a getter or field named 'toJS'. (quality == null) ? toDataURL(type) : toDataURL(type, quality.toJS); ^^^^ /C:/Users/DTC01/AppData/Local/Pub/Cache/hosted/pub.dev/web-0.5.1/lib/src/helpers/extensions.dart:51:7: Error: The method 'jsify' isn't defined for the class 'Map<String, bool>'.

• 'Map' is from 'dart:core'. Try correcting the name to the name of an existing method, or defining a method named 'jsify'. }.jsify(); ^^^^^ Unhandled exception: FileSystemException(uri=org-dartlang-untranslatable-uri:dart%3Ajs_interop; message=StandardFileSystem only supports file: and data: URIs)

  0 StandardFileSystem.entityForUri (package:front_end/src/api_prototype/standard_file_system.dart:34)

  1 asFileUri (package:vm/kernel_front_end.dart:752)

  2 writeDepfile (package:vm/kernel_front_end.dart:892)

  #3 FrontendCompiler.compile (package:frontend_server/frontend_server.dart:680) #4 starter (package:frontend_server/starter.dart:101) #5 main (file:///C:/b/s/w/ir/x/w/sdk/pkg/frontend_server/bin/frontend_server_starter.dart:13)

Target kernel_snapshot failed: Exception

FAILURE: Build failed with an exception.

• What went wrong: Execution failed for task ':app:compileFlutterBuildDebug'.

  Process 'command 'D:\DevFiles\tools\flutter_windows_3.22.2-stable\flutter\bin\flutter.bat'' finished with non-zero exit value 1

• Try:

  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

• Get more help at https://help.gradle.org

BUILD FAILED in 23s Error: Gradle task assembleDebug failed with exit code 1

Screenshots and/or video If applicable, add screenshots or video to help explain your problem.

Flutter Version details 3.22.2

[rickyManalo]

After some testing, if I run the app on Chrome through Android Studio, everything works fine. But if I use the built web page on Opera GX and Chrome, I'd get an error that are also different for each browser. For OperaGX, I'd get a "LateInitializationError: Field '_instance' has not been initialized." error. For Chrome, I'd get a "Uncaught [minifiied variables]" error.

[rickyManalo]

It seems like I was missing some dependencies in my server that's why file picker wasn't working correctly