[dwds] [webdev] Loading injected client script fails in aot mode.

[schultek]

When running dwds in aot mode (e.g. dart install webdev) the injected client loading fails due to the following lines not working correctly:

webdev/dwds/lib/src/handlers/injector.dart

Lines 47 to 52 in 38d7818

	final uri = await Isolate.resolvePackageUri(
	Uri.parse('package:$_clientScript.js'),
	);
	if (uri == null) {
	throw StateError('Cannot resolve "package:$_clientScript.js"');
	}

This causes the following error when running webdev serve and trying to load the website:

GET /dwds/src/injected/client.js
Error thrown by handler.
Bad state: Cannot resolve "package:dwds/src/injected/client.js"
package:shelf/shelf_io.dart 91                   serveRequests
package:webdev/src/util.dart 25                  serveHttpRequests.<fn>
package:stack_trace                              Chain.capture
package:webdev/src/util.dart 24                  serveHttpRequests
package:webdev/src/serve/webdev_server.dart 300  WebDevServer.start

@bkonyi

[jyameo]

Thanks for the report @schultek! Could you please clarify a couple of details to help us investigate?

• Environment: What OS are you using?
• Dart Version: What is the output of dart --version?

[schultek]

Dart SDK version: 3.10.0 (stable) (Thu Nov 6 05:24:55 2025 -0800) on "macos_arm64"

[jyameo]

Thanks for sharing these details @schultek. Will look into this and provide updates once I have more information.

[Varadraj75]

• Reproduced locally on macOS (ARM) with Dart 3.10.x using dart install webdev (AOT); fails with Cannot resolve package:dwds/src/injected/client.js, while dart run webdev serve works.
• Root cause appears to be use of Isolate.resolvePackageUri for a JS asset in AOT; proposing to avoid package URI resolution by using an AOT-safe approach (e.g. embedding the injected client JS).
• I plan to raise a PR addressing this, pending maintainer feedback on the approach.

[schultek]

@jyameo any updates on this? I think embedding the script as in @Varadraj75 's PR is the best approach, alternative would probably be using hooks but that seems like more work without much benefit.

[jyameo]

Hi @schultek and @Varadraj75, apologies for the delayed response. I am currently investigating this issue; however, I haven’t been able to reproduce it locally using the environment details provided:

• Dart SDK version: 3.10.0 (stable) (Unknown timestamp) on "macos_arm64".

Running dart pub global activate webdev, dart install webdev, webdev serve all worked as expected without triggering the error. Could you please confirm if you are still experiencing this issue? If so, could you provide specific steps to reproduce it? Thanks

[schultek]

Make sure to run dart pub global deactivate webdev before dart install webdev else you have it installed twice.

Then simply:

• dart create -t web myapp
• webdev serve

Just tried it again and still get this error:

[INFO] Serving `web` on http://127.0.0.1:8080
[INFO] --------------------------------------------------------------------------------------------------------------------------------------------------
[INFO] Injected debugging metadata for entrypoint at http://127.0.0.1:8080/main.dart.bootstrap.jsERROR - 2026-03-23 19:48:44.652748
GET /dwds/src/injected/client.js
Error thrown by handler.
Bad state: Cannot resolve "package:dwds/src/injected/client.js"
package:shelf/shelf_io.dart 91                   serveRequests
package:webdev/src/util.dart 25                  serveHttpRequests.<fn>
package:stack_trace                              Chain.capture
package:webdev/src/util.dart 24                  serveHttpRequests
package:webdev/src/serve/webdev_server.dart 289  WebDevServer.start

on Dart SDK version: 3.11.1 (stable) (Tue Feb 24 00:03:07 2026 -0800) on "macos_arm64"