Blazor JS Interop is bugged in an hard to reproduce scenario.

[Kuinox]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

On firefox, my odd setup (vite.js serving blazor and ts files), sometimes trigger an error.
While I have not pinpointed the cause, it trigger a bug here:

https://github.com/dotnet/aspnetcore/blob/main/src/JSInterop/Microsoft.JSInterop.JS/src/src/Microsoft.JSInterop.ts#L74

here document.baseURI can return an URI with a hash, making the concatenation on the hash instead of the path part of the URI. When importing files, the hash is truncated.
This lead to this:

Expected Behavior

The concatenation works and this function successfuly import the file.

Steps To Reproduce

N/A don't know how to reproduce, happens randomly

Exceptions (if any)

No response

.NET Version

No response

Anything else?

No response

[javiercn]

@Kuinox thanks for contacting us.

How are you getting a hash in the document.baseURI?

Hi @Kuinox. We have added the "Needs: Author Feedback" label to this issue, which indicates that we have an open question for you before we can take further action. This issue will be closed automatically in 7 days if we do not hear back from you by then - please feel free to re-open it if you come back to this issue after that time.

[Kuinox]

@Kuinox thanks for contacting us.

How are you getting a hash in the document.baseURI?

Yes, you can see it in the image, the file script is concatenated to the hash.

[javiercn]

@Kuinox I am asking what is your app doing to cause that.

The document base is typically set in the base element on the head.

Hi @Kuinox. We have added the "Needs: Author Feedback" label to this issue, which indicates that we have an open question for you before we can take further action. This issue will be closed automatically in 7 days if we do not hear back from you by then - please feel free to re-open it if you come back to this issue after that time.

[Kuinox]

I'm serving my app with the Vite.js dev server, which is probably the thing causing this behavior.