[net8-browser] Failed to load resource: _framework/avalonia.js

[tbayart]

Hi,

Freshly installed Avalonia UI and trying project template Avalonia Cross Platform Application
Runned successfully desktop version but stuck on Avalonia trademark screen for web browser
Browser console says "avalonia.js net::ERR_ABORTED 404"

Tried dotnet workload install wasm-tools without better result
cleaned solution, rebuild, reboot, still the same 404 because of missing avalonia.js
upgraded Avalonia from 12.2.1 to 12.2.6 but no change

I created a new project from scratch with no luck, still the same issue.
I checked installed awsm-tools using dotnet workload list and saw i had
wasm-tools 9.0.4/9.0.100 SDK 9.0.200
My project's TargetFramework is net8.0-browser

I noticed when i build my project, i have the following in Output :
>C:\Program Files\dotnet\sdk-manifests\9.0.100\microsoft.net.workload.mono.toolchain.current\9.0.4\WorkloadManifest.targets(205,5): warning : @(NativeFileReference) is not empty, but the native references won't be linked in, because neither $(WasmBuildNative), nor $(RunAOTCompilation) are 'true'. NativeFileReference=C:\Users\Shenron\.nuget\packages\skiasharp.nativeassets.webassembly\2.88.9\buildTransitive\netstandard1.0\..\..\build\netstandard1.0\libSkiaSharp.a\3.1.34\st\libSkiaSharp.a;C:\Users\Shenron\.nuget\packages\harfbuzzsharp.nativeassets.webassembly\7.3.0.3\buildTransitive\netstandard1.0\..\..\build\netstandard1.0\libHarfBuzzSharp.a\3.1.34\st\libHarfBuzzSharp.a

So I upgraded TargetFramework to net9.0-browser then run the app
I have a SSL warning asking to trust ASP.NET Core SSL certificate - that was not the cas with .net8
Visual Studio start a new browser instance - that was not the cas with .net8
The app is now using the urls from launchSettings.json - that was not the cas with .net8 (5 digits random port every run)
And the app is now running fine

Note : i didn't changed Avalonia main (common) project where TargetFramework is still net8.0

Any explanation is welcome

[maxkatz6]

If you were running "net8.0" target on 9.0 SDK, you had to install wasm-tool-net8 workload as well. See https://docs.avaloniaui.net/docs/guides/platforms/how-to-use-web-assembly

[tbayart]

Thanks @maxkatz6
this have solved my issue but i had to start a new project from scratch to find it worked
my first project still had the issue despite all files were identical
propably a cache issue or something related to some data ouside the solution itself

[tbayart]

Well, i spoke too quickly
I still have issues, my application keep freezing on the Avalonia splash screen
no error in the browser on in the debugger
still trying to understand