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Images fails to load the second time on web when compiled to wasm

Open OutdatedGuy opened this issue 11 months ago • 4 comments

🐛 Bug Report

When compiled to wasm, images don't load the second time if navigated back and forth again, giving the below error:

ImageCodecException: Failed to decode image using the browser's ImageDecoder API.
Image source: https://docs.flutter.dev/assets/images/dash/dash-fainting.gif
Original browser error: JavaScriptError

But, if you provide the errorListener param some value, this error mysteriously fixes.

Expected behavior

Images should load every time without giving any errors even if errorListener is not provided.

Reproduction steps

  1. Copy below sample code into lib/main.dart
  2. Run on web with wasm using the below command:
    flutter run -d chrome --wasm
    
  3. Click on Open Page 1 button and wait for the image to load
  4. Click back and wait 5 seconds
  5. Once again click Open Page 1 button
  6. See image loading error
  7. Now uncomment the errorListener line in sample code
  8. Enter r in terminal to hot restart
  9. Repeat steps 3-5
  10. See the error is fixed magically

Configuration

Version: 3.4.1

Platform:

  • [ ] :iphone: iOS
  • [ ] :robot: Android
  • [x] :spider_web: Web

Additional Data

Sample Code

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

void main() => runApp(const MyApp());

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  final _urls = [
    'https://docs.flutter.dev/assets/images/dash/dash-fainting.gif',
    'https://picsum.photos/250?image=2',
  ];

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Web Images',
      home: Builder(
        builder: (context) {
          return Scaffold(
            appBar: AppBar(title: Text('Web Images')),
            body: Center(
              child: Column(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  ElevatedButton(
                    onPressed: () => _onPressed(context, 0),
                    child: Text('Open Page 1'),
                  ),
                  const SizedBox(height: 20),
                  ElevatedButton(
                    onPressed: () => _onPressed(context, 1),
                    child: Text('Open Page 2'),
                  ),
                ],
              ),
            ),
          );
        },
      ),
    );
  }

  void _onPressed(BuildContext context, int index) {
    Navigator.of(context).push(
      MaterialPageRoute(builder: (context) => NewWidget(url: _urls[index])),
    );
  }
}

class NewWidget extends StatelessWidget {
  const NewWidget({super.key, required this.url});

  final String url;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(),
      body: Center(
        child: CachedNetworkImage(
          imageUrl: url,
          placeholder: (_, _) => CircularProgressIndicator.adaptive(),
          // ! Uncomment the line below to see magic
          // errorListener: (_) {},
        ),
      ),
    );
  }
}

OutdatedGuy avatar Mar 14 '25 21:03 OutdatedGuy

Any updates on this? 😢

ksenia312 avatar May 17 '25 12:05 ksenia312

Same issue here. Thanks for suggesting the "magic" errorListener workaround, great to have this as a temporary fix!

putnokiabel avatar Jun 27 '25 11:06 putnokiabel

errorListener workaround not work at first time install serviceWorker.

is imageRenderMethodForWeb: ImageRenderMethodForWeb.HttpGet work?

quyenlv-unicloud avatar Jul 24 '25 08:07 quyenlv-unicloud

any updates???

unix14 avatar Sep 23 '25 23:09 unix14