Validate state of Blazor with RC2 bits

[mkArtakMSFT]

Here are all the details about the build to use for validation:

Installer to use

Version: 6.0.100-rc.2.21463.4

Feed configuration

<configuration>
  <packageSources>
    <add key="dotnet6" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet6/nuget/v3/index.json" />
  </packageSources>
</configuration>

[mkArtakMSFT]

@javiercn , @pranavkm , @SteveSandersonMS, @TanayParikh this is waiting for your input, guys.
As we've agreed earlier, please add a comment about the app that you're going to build for validation. We can have a follow-up conversation then.

[javiercn]

I'm going to build some calorie tracker app or something like that, I'll focus on auth, JS runtime components and MVC integration

[SteveSandersonMS]

I'm focusing on WebAssembly specific features with AOT and native dependencies. For example, I'll try integrating with some library implemented in another wasm-targetable language like Go. I don't yet know what business domain gimmick I'll choose but it will probably end up feeding into my DotNetConf talk.

It's not absolutely clear how quickly I can move with this since native dependencies isn't yet available properly in the SDK. I'll talk with @radical or @lewing later today about timings.

[pranavkm]

I was planning to pick up one of the rc1 scenarios with STJ source generation, hot reload, and Blazor that is listed in the app building exercise, but with rc2 bits.

[TanayParikh]

Building a CRUD app integrating with auth, hot reload, aot, and JS interop.

Doing so on Mac -> https://aka.ms/dotnet/6.0.1xx/daily/dotnet-sdk-osx-x64.pkg to validate that flow.

---

Issues:

• dotnet watch with aot leads to unexpected behavior #36579
• https://github.com/dotnet/aspnetcore/issues/36581
• Failed to find up to date dotnet cli on the path Error Message Truncated vscode-csharp#4771
  • Issue detecting SDK (under investigation)
  • Error message formatting: Update missing dotnet sdk error message vscode-csharp#4773
  • Build fix in commands.pickProjectAndStart vscode-csharp#4774
• mono eats up CPU on MacOS vscode-csharp#4777
• https://github.com/dotnet/aspnetcore/issues/36821
  • VSCode ? commit char conflicts with ?? Null Coalescing Operator OmniSharp/omnisharp-roslyn#2237
• https://github.com/dotnet/aspnetcore/issues/36822
• [Hot Reload] Source Generator Based Error Breaks Hot Reload #36825

[Eilon]

I will do SPA/React/Angular/etc. to build a Todo app with some API endpoints.

[TanayParikh]

Should we move to validating the GA bits rather than RC? It may have additional patches (and better reflect the final release).

https://aka.ms/dotnet/6.0.1xx/daily/dotnet-sdk-win-x64.exe

6.0.100-rtm.21466.6

[Eilon]

I created a new React SPA using command line and then editing in VS. I cobbled together code from several different samples along with some new code and made a simple, if fairly awful, todo app. I'll iterate on it some more to see if I find anything more.

Findings:

• Couldn't initially find SPA templates in VS. I used the SPA keyword, which returns nothing: Consider adding 'SPA' keyword to all SPA templates (React, Angular, etc.) #37097
• VS Hot Reload won't stop nagging about Edit/Stop when I save the file: https://developercommunity.visualstudio.com/t/hot-reload-wont-stop-its-incessant-and-irritating/1541597?from=email
• Go To Definition for typeof(Program) navigates to wrong location: https://developercommunity.visualstudio.com/t/go-to-definition-for-typeofprogram-highlights-the/1541614?from=email
• <Nullable>enable</Nullable> is very irritating when I am starting out. Green squiggles everywhere in all the code I write. Templates with <Nullable>enable</Nullable> are very irritating to get started with #37099
• Had to modify setupProxy.js to handle my api/... routes. Maybe it could be improved with a more generic pattern so it doesn't have to be modified in every app? React SPA template is cumbersome to use when adding new API routes due to the proxy requirement #37103
• Small typo in SPA React template: Typos in React SPA template FetchData.js #37105

[pranavkm]

I spent some time building a Blazor WASM app that connected to https://my.plantnet.org/ do some plant identification and cataloging. My focus was on using STJ source generators with Blazor WASM, Blazor's new streaming capabilities, editor performance, and hot reload.

• The source generators are fairly solid and I wasn't able to find any issues with it. Blazor WASM's hot reload capabilities are still lacking with custom attributes, so it did make it slightly annoying to not be able to add a new item to the JsonContext and continue from there without doing a full restart.
• Didn't find any issues with the streaming APIs. The API endpoint limits what the size of the images are, so I played around with uploading large pictures, resizing them, and then streaming them over HtpClient. It worked pretty nicely and no oddities to report there.
• I was using 17.0 p4.1 for this exercise. While the editor performance wasn't an issue, the auto-formatting was incredibly frustrating (Editor would add indentation where I wished it hadn't).
• I +1ed one InputSelectEnum #34823. I needed it, and given how easy it was in MVC, I found it someone annoying to handwrite this with Blazor. Either way, binding enum values works pretty nicely. Also +1 ed Consider shipping ObjectGraphDataAnnotationsValidator / ValidateComplexTypeAttribute #28640. Thankfully the current package on NuGet.org worked pretty well.
• Some VS issues I filed:
  * https://developercommunity.visualstudio.com/t/blazor-webassembly-performing-hot-reload-when-the/1530899
  * https://developercommunity.visualstudio.com/t/pressing-the-stop-button-when-a-hot-reload-rude-ed/1530873
  * https://developercommunity.visualstudio.com/t/add-razor-component-does-not-have-an-icon/1530777
  * https://developercommunity.visualstudio.com/t/hot-reload-rude-edit-diagnostics-from-source-gener/1528293