Blazor .NET 9 tracking issue

[guardrex]

ASP.NET Core 9: Web UI Milestones

https://github.com/orgs/dotnet/projects/320/views/3

Derived from the 9.0 roadmap

🟢 = Ready      ✔️ = Done      🛑 = Wait on PU to finish      ❌ = No action required

Status	Live	Issue	PR	Item	PU Links/ Blog
🟢	—	—	—	Check/confirm no new components for built-in components article
✔	—	dotnet/blazor-samples#373	dotnet/blazor-samples#374	Update components and assets in sample apps
✔	—	#33869	#33870 #33872	Cross-link 9.0 sample code into articles
✔️	Live	#33779	#33805	BWA with MS Identity Platform for Entra	PU Issue New sample
✔	Live	#33801	#33832	BWA+OIDC article updates	Sample updates
❌	—	#33728	—	Improved debugging experience for Blazor WASM	No update needed.
🚧 IN PROGRESS 👷	Live 1 Live 2 Live 3	#33692	#33693	WASM streaming upload	PU PR
✔️	Live	#33556	#33557	Override InputNumber type attribute	—
✔️	Live	#32614	#32617	Overscan count	#32611
✔️	SignalR Security	#31915	#31918	Enable compression on blazorpack	See docs issue for PU cross-links
✔️	Live	#31926	#31927	Constructor injection for Blazor components	Issue PR
✔️	Live	#31916	#32096	Remark on CRIME/BREACH in route param and query string guidance	The Live link is one of three examples (JS interop). The other two appearances are in the Route Params section (Components overview article) and Query Strings (Routing article) sections.
✔	Live	#32797	#32799 #33832	Built in AuthenticationStateProviders from project templates	PU PR Pre5 issue
✔	Live	—	#32599	Provide a mechanism for rendering Blazor pages statically even when the app is set up for interactive rendering	Issue 1 Issue 2 PR Post
✔️	Live	#32789	#32790	Better reconnection logic for Blazor Server	Issue Pre5 issue
✔️	Live	#32780	#32794	Detect the current render mode at runtime	Issue Pre5 issue PU PR
✔️	Live	#32810	#32811 #33856 Samples	Map Static Assets Blazor-specific coverage	Pre5 issue
✔️	Live	#32996	#32997	Change 'Platform' to 'RendererInfo' for Render Mode detection API	PR
✔️	Live	#33005	#33010	Optimize file delivery for web apps and fingerprinting	See docs issue for links
❌	—	—	—	AsNonRenderingEventHandler + ErrorBoundary = unexpected behavior	Issue Resolved as a support request
✔️	—	—	—	Append Hashes To Blazor Published Files	Issue Seems to be covered by/related to the preceding file delivery work item.
✔️	—	—	—	Move integrity support to the Static Web Assets SDK from the Blazor WebAssembly SDK	Issue Seems to be covered by/related to the preceding file delivery work item.

Moved to .NET 10

• Add Microsoft Identity Platform auth option to the Blazor Web App template | Issue
• [browser] Publish wasmbrowser app from Visual Studio doesn't respect "include RID in output path" | Issue
• Add activities to Blazor Server for distributed tracing | Issue
• Declarative model to serialize state on prerendering with Blazor and restore it on the client | Issue
• Revisit hot reload browser refresh script injection | Issue
• Support persistent component state across enhanced page navigations | Issue
• Add Metrics for Blazor | Issue
• Add mechanism for interactively-rendered form to submit as HTTP request to SSR endpoint | Issue
• Real multithreading in Blazor WebAssembly | Issue Runtime Issue SEE 👉 Document what's new in ASP.NET Core for .NET 9 Preview 2 #31770 (comment)
• APIs for components to persist state across circuits manually | Issue
• Adding a route to a Blazor component doesn't work with hot reload | Issue
• Ability to set port for browser refresh websocket connection when using dotnet watch | Issue
• Modernize the Blazor Web template | Issue
• Generate modern JS outputs that can be consumed by other JS toolchains (Blazor->JS) | Issue
• When prerendering, emit culture name and use it on WebAssembly side | Issue
• Blazor NavigationManager.NavigateTo always scrolls page to the top | Issue
• Add support to the QuickGrid paginator for static server rendering | Issue

Derived from 8.0 issues/PRs not on the roadmap

🟢 = Ready      ✔️ = Done      🛑 = Wait on PU to finish      ❌ = No action required

Status	Live	Issue	PR	Item	PU Links/ Blog
...	...	...	...	...	...

Other

• xxx
• xxx

9.0 Post GA

Status	Issue	PR	Item
—	—	—	Enable (uncomment) the latest version INCLUDE to the new docs that were added for .NET 8 last year.
❌	—	—	The file uploads code changes on #33357 can be reverted for 9.0 if the PU fixes their issue. UPDATE: Pushed by the PU to .NET 10 and noted in 2024 UE tracking, which will be copied to 2025's .NET 10 tracking issue.
—	—	—	Re-walk the movie tutorial to confirm all is well, especially that final scaffolder code matches what's in the article/sample app.

Other

Status	Live	Issue	PR	Item	PU Links/ Blog
...	...	...	...	...	...

Blazor Hybrid

Status	Live	Issue	PR	Item	PU Links
✔️	Live	#32792	#32793	New .NET MAUI Blazor Hybrid template	Pre5 issue
✔	Live	#32802	#33865	MauiBlazorWeb 9.0 updates	Docs PR for updates

Preview announcements

https://github.com/dotnet/aspnetcore/discussions?discussions_q=is%3Aopen+author%3Adanroth27

.NET Blog posts

https://devblogs.microsoft.com/search?query=%22.NET+9%22&blogs=%2Fdotnet%2F&sortby=relevance&search-button=

9.0 preview/RC PU issues for analysis

This section of linked issues is assessed for items that didn't make the roadmap but have a bearing on docs.

• https://github.com/dotnet/aspnetcore/issues?q=is%3Aissue+label%3Aarea-blazor+milestone%3A9.0-preview1
• https://github.com/dotnet/aspnetcore/issues?q=is%3Aissue+label%3Aarea-blazor+milestone%3A9.0-preview2
• https://github.com/dotnet/aspnetcore/issues?q=is%3Aissue+label%3Aarea-blazor+milestone%3A9.0-preview3
• https://github.com/dotnet/aspnetcore/issues?q=is%3Aissue+label%3Aarea-blazor+milestone%3A9.0-preview4
• https://github.com/dotnet/aspnetcore/issues?q=is%3Aissue+label%3Aarea-blazor+milestone%3A9.0-preview5
• https://github.com/dotnet/aspnetcore/issues?q=is%3Aissue+label%3Aarea-blazor+milestone%3A9.0-preview6
• https://github.com/dotnet/aspnetcore/issues?q=is%3Aissue+label%3Aarea-blazor+milestone%3A9.0-preview7
• https://github.com/dotnet/aspnetcore/issues?q=is%3Aissue+label%3Aarea-blazor+milestone%3A9.0-rc1
• https://github.com/dotnet/aspnetcore/issues?q=is%3Aissue+label%3Aarea-blazor+milestone%3A9.0-rc2

.NET 9 Planning

https://github.com/dotnet/aspnetcore/issues?q=is%3Aopen+is%3Aissue+label%3Aarea-blazor+milestone%3A%22.NET+9+Planning%22

Issues to watch 👀 ...

• xxx
• xxx

PU roadmap

ASP.NET Core Roadmap for .NET 9 (dotnet/aspnetcore #51834)