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[Blazor] Built-in components improvements

area-blazorIncludes: Blazor, Razor ComponentsIncludes: Blazor, Razor Components

on-roadmapListed on the current release roadmapListed on the current release roadmap

Pillar: Dev Experience

Status: Open.

#58819 In dotnet/aspnetcore;

· javiercn opened on Nov 6, 2024

[Blazor] Cascading Parameter that transfers across render boundaries

area-blazorIncludes: Blazor, Razor ComponentsIncludes: Blazor, Razor Components

copilot-candidate

enhancementThis issue represents an ask for new feature or an enhancement to an existing oneThis issue represents an ask for new feature or an enhancement to an existing one

Pillar: Complete Blazor Web

Priority:1Work that is critical for the release, but we could probably ship withoutWork that is critical for the release, but we could probably ship without

Status: Open.

Feature

#51969 In dotnet/aspnetcore;

· javiercn opened on Nov 9, 2023

ScrollToItemAsync(int itemIndex) design for Virtualization

area-blazorIncludes: Blazor, Razor ComponentsIncludes: Blazor, Razor Components

design-proposalThis issue represents a design proposal for a different issue, linked in the descriptionThis issue represents a design proposal for a different issue, linked in the description

feature-blazor-virtualizationThis issue is related to the Blazor Virtualize componentThis issue is related to the Blazor Virtualize component

feature-request

Status: Open.

Feature

#66328 In dotnet/aspnetcore;

· ilonatommy opened on Apr 15, 2026

[API Proposal] Localization support for Microsoft.Extensions.Validation

api-proposal

api-ready-for-reviewAPI is ready for formal API review - https://github.com/dotnet/apireviewsAPI is ready for formal API review - https://github.com/dotnet/apireviews

area-blazorIncludes: Blazor, Razor ComponentsIncludes: Blazor, Razor Components

area-minimalIncludes minimal APIs, endpoint filters, parameter binding, request delegate generator etcIncludes minimal APIs, endpoint filters, parameter binding, request delegate generator etc

feature-validationIssues related to model validation in minimal and controller-based APIsIssues related to model validation in minimal and controller-based APIs

Status: Open.

#66392 In dotnet/aspnetcore;

· oroztocil opened on Apr 20, 2026

Blazor Form Validation Enhancements

area-blazorIncludes: Blazor, Razor ComponentsIncludes: Blazor, Razor Components

on-roadmapListed on the current release roadmapListed on the current release roadmap

Status: Open.

Epic

#64892 In dotnet/aspnetcore;

· javiercn opened on Dec 29, 2025

Virtualize component Row Index Enhancements (API to scroll to item)

affected-fewThis issue impacts only small number of customersThis issue impacts only small number of customers

area-blazorIncludes: Blazor, Razor ComponentsIncludes: Blazor, Razor Components

enhancementThis issue represents an ask for new feature or an enhancement to an existing oneThis issue represents an ask for new feature or an enhancement to an existing one

feature-blazor-virtualizationThis issue is related to the Blazor Virtualize componentThis issue is related to the Blazor Virtualize component

Pillar: Complete Blazor Web

Priority:2Work that is important, but not critical for the releaseWork that is important, but not critical for the release

severity-blockingThis label is used by an internal toolThis label is used by an internal tool

Status: Open.

Feature

#26943 In dotnet/aspnetcore;

· bancroftway opened on Oct 15, 2020

Virtualize support for controlling scroll position

area-blazorIncludes: Blazor, Razor ComponentsIncludes: Blazor, Razor Components

feature-blazor-virtualizationThis issue is related to the Blazor Virtualize componentThis issue is related to the Blazor Virtualize component

on-roadmapListed on the current release roadmapListed on the current release roadmap

Status: Open.

#64889 In dotnet/aspnetcore;

· javiercn opened on Dec 29, 2025

API Proposal: Microsoft.AspNetCore.Components.Testing E2E infrastructure

api-proposal

api-ready-for-reviewAPI is ready for formal API review - https://github.com/dotnet/apireviewsAPI is ready for formal API review - https://github.com/dotnet/apireviews

area-blazorIncludes: Blazor, Razor ComponentsIncludes: Blazor, Razor Components

Status: Open.

#66394 In dotnet/aspnetcore;

· javiercn opened on Apr 20, 2026

API Proposal: BrowserConfiguration for server-to-client configuration

api-proposal

api-ready-for-reviewAPI is ready for formal API review - https://github.com/dotnet/apireviewsAPI is ready for formal API review - https://github.com/dotnet/apireviews

area-blazorIncludes: Blazor, Razor ComponentsIncludes: Blazor, Razor Components

Status: Open.

#66393 In dotnet/aspnetcore;

· javiercn opened on Apr 20, 2026

API Proposal: Media components (Image, Video, FileDownload)

api-proposal

api-ready-for-reviewAPI is ready for formal API review - https://github.com/dotnet/apireviewsAPI is ready for formal API review - https://github.com/dotnet/apireviews

area-blazorIncludes: Blazor, Razor ComponentsIncludes: Blazor, Razor Components

Status: Open.

#66391 In dotnet/aspnetcore;

· javiercn opened on Apr 20, 2026

API Proposal: Blazor SSR TempData support

api-proposal

api-ready-for-reviewAPI is ready for formal API review - https://github.com/dotnet/apireviewsAPI is ready for formal API review - https://github.com/dotnet/apireviews

area-blazorIncludes: Blazor, Razor ComponentsIncludes: Blazor, Razor Components

Status: Open.

#66390 In dotnet/aspnetcore;

· javiercn opened on Apr 20, 2026

API Proposal: QuickGrid OnRowClick EventCallback

api-approvedAPI was approved in API review, it can be implementedAPI was approved in API review, it can be implemented

api-proposal

area-blazorIncludes: Blazor, Razor ComponentsIncludes: Blazor, Razor Components

Status: Open.

#66389 In dotnet/aspnetcore;

· javiercn opened on Apr 20, 2026

API Proposal: BasePath component for Blazor

api-proposal

api-ready-for-reviewAPI is ready for formal API review - https://github.com/dotnet/apireviewsAPI is ready for formal API review - https://github.com/dotnet/apireviews

area-blazorIncludes: Blazor, Razor ComponentsIncludes: Blazor, Razor Components

Status: Open.

#66388 In dotnet/aspnetcore;

· javiercn opened on Apr 20, 2026

API Proposal: ServerComponentsEndpointOptions.ConfigureConnection

api-approvedAPI was approved in API review, it can be implementedAPI was approved in API review, it can be implemented

api-proposal

area-blazorIncludes: Blazor, Razor ComponentsIncludes: Blazor, Razor Components

Status: Open.

#66387 In dotnet/aspnetcore;

· javiercn opened on Apr 20, 2026

API Proposal: InputFile.Dispose(bool) virtual dispose pattern

api-approvedAPI was approved in API review, it can be implementedAPI was approved in API review, it can be implemented

api-proposal

area-blazorIncludes: Blazor, Razor ComponentsIncludes: Blazor, Razor Components

Status: Open.

#66386 In dotnet/aspnetcore;

· javiercn opened on Apr 20, 2026

API Proposal: EnvironmentBoundary component for Blazor

api-proposal

api-ready-for-reviewAPI is ready for formal API review - https://github.com/dotnet/apireviewsAPI is ready for formal API review - https://github.com/dotnet/apireviews

area-blazorIncludes: Blazor, Razor ComponentsIncludes: Blazor, Razor Components

Status: Open.

#66385 In dotnet/aspnetcore;

· javiercn opened on Apr 20, 2026

API Proposal: NavigationManagerExtensions.GetUriWithHash

api-proposal

api-ready-for-reviewAPI is ready for formal API review - https://github.com/dotnet/apireviewsAPI is ready for formal API review - https://github.com/dotnet/apireviews

area-blazorIncludes: Blazor, Razor ComponentsIncludes: Blazor, Razor Components

Status: Open.

#66384 In dotnet/aspnetcore;

· javiercn opened on Apr 20, 2026

CacheBoundary support for Blazor

area-blazorIncludes: Blazor, Razor ComponentsIncludes: Blazor, Razor Components

Status: Open (in progress).

dotnet/aspnetcorenumber 65772

#65772 In dotnet/aspnetcore;

· dariatiurina opened on Mar 13, 2026

[Blazor] Aspire integration improvements

area-blazorIncludes: Blazor, Razor ComponentsIncludes: Blazor, Razor Components

on-roadmapListed on the current release roadmapListed on the current release roadmap

Status: Open.

Epic

#64888 In dotnet/aspnetcore;

· javiercn opened on Dec 29, 2025

[Blazor] WebAssembly OpenTelemetry integration

area-blazorIncludes: Blazor, Razor ComponentsIncludes: Blazor, Razor Components

enhancementThis issue represents an ask for new feature or an enhancement to an existing oneThis issue represents an ask for new feature or an enhancement to an existing one

on-roadmapListed on the current release roadmapListed on the current release roadmap

Status: Open.

Feature

#64890 In dotnet/aspnetcore;

· javiercn opened on Dec 29, 2025

[Blazor] Enable debugging for Blazor WebAssembly apps launched from Aspire dashboard

area-blazorIncludes: Blazor, Razor ComponentsIncludes: Blazor, Razor Components

on-roadmapListed on the current release roadmapListed on the current release roadmap

Status: Open.

#64891 In dotnet/aspnetcore;

· javiercn opened on Dec 29, 2025

[API Proposal] IComponentPropertyActivator for Blazor property injection

api-approvedAPI was approved in API review, it can be implementedAPI was approved in API review, it can be implemented

api-proposal

area-blazorIncludes: Blazor, Razor ComponentsIncludes: Blazor, Razor Components

Status: Open.

#64596 In dotnet/aspnetcore;

· javiercn opened on Dec 2, 2025

[Wasm.Performance] Failed to load resource Error after benchmark run

area-blazorIncludes: Blazor, Razor ComponentsIncludes: Blazor, Razor Components

Status: Open.

Bug

#64832 In dotnet/aspnetcore;

· LoopedBard3 opened on Dec 19, 2025

API proposal for NavigateTo and NavLink with relative path

api-proposal

api-ready-for-reviewAPI is ready for formal API review - https://github.com/dotnet/apireviewsAPI is ready for formal API review - https://github.com/dotnet/apireviews

api-suggestionEarly API idea and discussion, it is NOT ready for implementationEarly API idea and discussion, it is NOT ready for implementation

area-blazorIncludes: Blazor, Razor ComponentsIncludes: Blazor, Razor Components

Status: Open.

#65060 In dotnet/aspnetcore;

· ilonatommy opened on Jan 14, 2026

API proposal for Label support for DisplayName

api-proposal

api-ready-for-reviewAPI is ready for formal API review - https://github.com/dotnet/apireviewsAPI is ready for formal API review - https://github.com/dotnet/apireviews

api-suggestionEarly API idea and discussion, it is NOT ready for implementationEarly API idea and discussion, it is NOT ready for implementation

area-blazorIncludes: Blazor, Razor ComponentsIncludes: Blazor, Razor Components

Status: Open.

#65062 In dotnet/aspnetcore;

· ilonatommy opened on Jan 14, 2026