Aspnetcore has a sample of Blazor wasm standalone in-tree

[ilonatommy]

We should keep our samples aligned with the scenarios we actively invest in. We already ship an in-tree sample for Blazor Web (https://github.com/dotnet/aspnetcore/tree/main/src/Components/Samples/BlazorUnitedApp) , but we still lacked a counterpart for Blazor WebAssembly Standalone. Adding this sample fills that gap and gives both developers and automated agents a canonical project to reference when troubleshooting or experimenting with pure client-side hosting.

I am not sure about the placing of the sample. Another location would be next to wasm hosted sample: https://github.com/dotnet/aspnetcore/tree/main/src/Components/WebAssembly/Samples/HostedBlazorWebassemblyApp
that is the old version of blazor web.

[Copilot]

Pull request overview

This PR adds a new in-tree sample application for Blazor WebAssembly Standalone to complement the existing Blazor Web sample. The sample demonstrates pure client-side hosting and provides a canonical reference project for developers and automated tools working with standalone WebAssembly applications.

Key Changes

• New BlazorWasmStandalone sample project with standard Blazor components (Counter, Weather, Home pages)
• Complete project structure including layouts, styling, and static assets
• Added DevServer project reference to ProjectReferences.props

Reviewed changes

Copilot reviewed 17 out of 20 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
BlazorWasmStandalone.csproj	Project configuration for Blazor WebAssembly SDK with necessary references
Program.cs	Application entry point with WebAssembly host configuration
App.razor	Router setup with NotFound page handling
Layout components	MainLayout and NavMenu for consistent navigation structure
Page components	Home, Counter, and Weather demonstration pages
wwwroot files	Static assets including index.html, CSS, Bootstrap, favicon, and sample data
ProjectReferences.props	Added DevServer project reference for build integration

[javiercn]

@ilonatommy have you checked under webassembly/samples? I believe there is one there.

[ilonatommy]

@ilonatommy have you checked under webassembly/samples? I believe there is one there.

yes but old one and not standalone:
https://github.com/dotnet/aspnetcore/tree/main/src/Components/WebAssembly/Samples

[ilonatommy]

@ilonatommy have you checked under webassembly/samples? I believe there is one there.

We can check it this way: searching for Include="Microsoft.AspNetCore.Components.WebAssembly.DevServer" in the repo: https://github.com/search?q=repo%3Adotnet%2Faspnetcore%20Include%3D%22Microsoft.AspNetCore.Components.WebAssembly.DevServer%22&type=code

[dotnet-policy-service]

Looks like this PR hasn't been active for some time and the codebase could have been changed in the meantime.
To make sure no conflicting changes have occurred, please rerun validation before merging. You can do this by leaving an /azp run comment here (requires commit rights), or by simply closing and reopening.

[javiercn]

@ilonatommy I think this was superseded by #67497

[ilonatommy]

I see, yes, https://github.com/dotnet/aspnetcore/tree/main/src/Components/WebAssembly/Samples/BlazorWebAssemblyStandalone provides same functionality. Closing.