[11.0 P4] Blazor What's New feature coverage

[guardrex]

Addresses #36448
Fixes #37108
Fixes #37109
Fixes #37110
Fixes #37111

If engineers get back to me on anything after P4 goes out, I'll place one or more patch PRs later.

---

Internal previews

📄 File	🔗 Preview link
aspnetcore/blazor/components/virtualization.md	aspnetcore/blazor/components/virtualization
aspnetcore/blazor/debug.md	aspnetcore/blazor/debug
aspnetcore/blazor/security/webassembly/standalone-with-identity/index.md	aspnetcore/blazor/security/webassembly/standalone-with-identity/index
aspnetcore/blazor/state-management/server.md	aspnetcore/blazor/state-management/server
aspnetcore/blazor/tooling.md	aspnetcore/blazor/tooling
aspnetcore/mobile/native-mobile-backend.md	aspnetcore/mobile/native-mobile-backend

[Copilot]

Pull request overview

This PR expands the ASP.NET Core 11 Blazor “What’s New” / feature coverage across release notes and several Blazor articles, adding documentation for new/updated templates, TempData parameter binding, and Virtualize enhancements.

Changes:

• Document [SupplyParameterFromTempData] usage for TempData in static SSR scenarios and add corresponding examples.
• Add .NET 11 content for virtualization (AnchorMode behavior) and update release notes to reflect virtualization enhancements.
• Add .NET 11 template coverage for the Blazor WASM service defaults template and note the new Blazor WebAssembly development server package.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
aspnetcore/release-notes/aspnetcore-11/includes/blazor.md	Adds .NET 11 Blazor release note entries for TempData parameter binding, virtualization enhancements, service defaults template, and the new WASM dev server.
aspnetcore/blazor/tooling.md	Adds .NET 11 template list updates and a new section documenting the blazor-wasm-servicedefaults template.
aspnetcore/blazor/state-management/server.md	Expands TempData guidance and adds [SupplyParameterFromTempData] coverage plus updated examples.
aspnetcore/blazor/security/webassembly/standalone-with-identity/index.md	Adds (currently commented) .NET 11 package guidance for Microsoft.AspNetCore.Components.Gateway.
aspnetcore/blazor/debug.md	Adds (currently commented) .NET 11 package guidance for Microsoft.AspNetCore.Components.Gateway vs DevServer.
aspnetcore/blazor/components/virtualization.md	Adds a .NET 11 section documenting viewport anchoring behavior (AnchorMode) and related guidance.

Comments suppressed due to low confidence (1)

aspnetcore/blazor/state-management/server.md:328

• NavigationManager.NavigateTo targets /tempdata-example, but this sample's route is @page "/tempdata-example-1", so the snippet navigates to a different (likely non-existent) endpoint. Update the navigation target to match the route (or change the @page directive back) so the example works as written.

    private void Submit()
    {
        TempData!["Message"] = "Form submitted successfully!";
        NavigationManager.NavigateTo("/tempdata-example", forceLoad: true);
    }

[wadepickett]

@guardrex, approved. Great work. One possible medium issue, (temp-example vs. temp-example-1) and a few super minor items.

[guardrex]

This PR went sideways with unrelated build warnings for the native mobile backend article. For example ...

Line 43: [Warning] The code snippet "~/../maui-samples/9.0/WebServices/TodoREST/TodoREST/Constants.cs" could not be found.

The reason is that they killed the sample app completely ...

dotnet/maui-samples#767

Anyway ... just as well I guess. That gave us a heads-up that the links should go to 10.0. I'll see if I can straighten them out on this PR.

Makes me wonder tho ... should this entire article be moved to MAUI docs? If they're going to manage the sample for this, it would be best if they maintain the content that goes with it. We'll never know exactly when they're going to break the code cross-links until they 💥 on us over here.

[guardrex]

@ilonatommy ... WRT Blazor Server Circuit Pause & Resume on Server Shutdown and Blazor server-triggered circuit pause, I see your ServerPauseTest component on the PU PR, but I think it would be more useful to devs to show how this would work in an app deployment/server restart scenario. I probably can't come up with that example quickly. Do you want to give me the code for that or something else that you'd like to show in the article's section on this?

BTW ... I'm looking at what Javier put up for the server shutdown case, and it looks like it would just take a few line changes to make it work with Circuit.RequestCircuitPauseAsync ... that is if the overall circuit-handler-based approach is correct. If it would only take a few line changes, let me have those if you want to use that scenario as the example use case. I put his code on the PR (commented out).

[guardrex]

@maraf ... Do I need to place What's New content for 11.0 Preview 4 for faster deployment of Blazor WebAssembly apps? If so, can you link me to the improvements or give me a blurb to place into the What's New article for it?

[guardrex]

@wadepickett ... I might not hear back from anyone on this, and that's fine. What's here can be merged, and I can do a patch PR after P4 release tonight or tomorrow (more likely tomorrow morning).

I guess you'll coordinate the final push; if so, then I recommend that you merge this when you're ready to go live with the P4 content.

If I receive engineer feedback, you'll see it come in here, and I'll jump on PR updates to squeeze them in under the deadline. Otherwise, I recommend that we go ahead with what we have here when you're ready to publish this afternoon.

UPDATE: I added the Native Mobile Backend article sample link updates to this, matching that you and Copilot did on the other PR. There shouldn't be merge conflicts 🍀🤞.

[guardrex]

Looks like no feedback will arrive today prior to release.

I'm going to go ahead and shoot this in to go live when the trigger is pulled for release.

[dariatiurina]

[SupplyParameterFromTempData] looks good! Sorry for taking so long to take a look.

[guardrex]

Awesome! Thx, @dariatiurina!

[ilonatommy]

I tried to update the commented out fragment (<!-- UPDATE 11.0 - REVIEWER NOTE). Please, let me know if you have some questions to that.

Generaly the changes transfer the sample from workaround-focused one to how-to-use with the new API focused.

[guardrex]

Nice!!! Thank you, @ilonatommy! 🎷 ... I'll get it activated into the article today on a new PR.