dotnet watch ignores StaticWebAssetBasePath for third-party library

[Apollo3zehn]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

I try to host a Blazor WASM app under the path <host>/dev using the property <StaticWebAssetBasePath>dev</StaticWebAssetBasePath>. My project is also referencing the third-party library MudBlazor and when I do dotnet publish -c Debug -o <path> the output is just fine, i.e. MudBlazor is below the dev/_content folder:

But when I run dotnet watch the files are not located under the dev/_content path but directly under _content (
the target framework is net7.0):

Expected Behavior

I expect that <StaticWebAssetBasePath>dev</StaticWebAssetBasePath> is also applied to third-party libraries when running dotnet watch.

Steps To Reproduce

1. Run

dotnet new blazorwasm 
dotnet add package MudBlazor

2. Edit the .csproj file and add <StaticWebAssetBasePath>dev</StaticWebAssetBasePath>.
3. Run dotnet publish
4. Have look into the published folder, it looks fine (_content/MudBlazor is located under wwwroot/dev).
5. Run dotnet watch
6. Try to load the file http://localhost:<your-port>/dev/_content/MudBlazor/MudBlazor.min.js: it fails
7. Try to load the file http://localhost:<your-port>/_content/MudBlazor/MudBlazor.min.js: it succeeds

Exceptions (if any)

No response

.NET Version

7.0.101

Anything else?

VS Code watch task

The project Veltrup.Server references and serves the WASM client project.

dotnet --info

.NET SDK:
Version: 7.0.101
Commit: bb24aafa11

Laufzeitumgebung:
OS Name: ubuntu
OS Version: 22.10
OS Platform: Linux
RID: linux-x64
Base Path: /home/vincent/Dokumente/Software/dotnet/sdk/7.0.101/

Host:
Version: 7.0.1
Architecture: x64
Commit: 97203d38ba

.NET SDKs installed:
5.0.408 [/home/vincent/Dokumente/Software/dotnet/sdk]
6.0.404 [/home/vincent/Dokumente/Software/dotnet/sdk]
7.0.101 [/home/vincent/Dokumente/Software/dotnet/sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 5.0.17 [/home/vincent/Dokumente/Software/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 6.0.12 [/home/vincent/Dokumente/Software/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 7.0.1 [/home/vincent/Dokumente/Software/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 5.0.17 [/home/vincent/Dokumente/Software/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 6.0.12 [/home/vincent/Dokumente/Software/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 7.0.1 [/home/vincent/Dokumente/Software/dotnet/shared/Microsoft.NETCore.App]

Other architectures found:
None

Environment variables:
DOTNET_ROOT [/home/vincent/Dokumente/Software/dotnet]

global.json file:
Not found

Learn more:
https://aka.ms/dotnet/info

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https://aka.ms/dotnet/download

[rushangp1]

I'm facing this too

[ghost]

Thanks for contacting us.

We're moving this issue to the .NET 9 Planning milestone for future evaluation / consideration. We would like to keep this around to collect more feedback, which can help us with prioritizing this work. We will re-evaluate this issue, during our next planning meeting(s).
If we later determine, that the issue has no community involvement, or it's very rare and low-impact issue, we will close it - so that the team can focus on more important and high impact issues.
To learn more about what to expect next and how this issue will be handled you can read more about our triage process here.