[automated] Merge branch 'release/5.0-preview8' => 'master'

AspNetCore.sln

@@ -1427,6 +1427,20 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.AspNetCore.Compon
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.AspNetCore.Components.Web.Extensions.Tests", "src\Components\Web.Extensions\test\Microsoft.AspNetCore.Components.Web.Extensions.Tests.csproj", "{157605CB-5170-4C1A-980F-4BAE42DB60DE}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "testassets", "testassets", "{2531F00A-54EB-4074-9C0B-9AF9FB3679DC}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "BasicTestApp", "src\Components\test\testassets\BasicTestApp\BasicTestApp.csproj", "{85D67E40-4B11-48ED-8C43-34590A1FB9ED}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "LazyTestContentPackage", "src\Components\test\testassets\LazyTestContentPackage\LazyTestContentPackage.csproj", "{C0EF53A5-5A94-4849-86B0-2297EA08D649}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ComponentsApp.App", "src\Components\test\testassets\ComponentsApp.App\ComponentsApp.App.csproj", "{4FDD820F-8397-41B7-956E-F257DD044BD8}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ComponentsApp.Server", "src\Components\test\testassets\ComponentsApp.Server\ComponentsApp.Server.csproj", "{CA7C7A53-446F-453A-A57B-78BB1443B8A8}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "TestContentPackage", "src\Components\test\testassets\TestContentPackage\TestContentPackage.csproj", "{B32C5882-2313-40D0-A003-2FF33724CFE6}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Components.TestServer", "src\Components\test\testassets\TestServer\Components.TestServer.csproj", "{26F88A06-319C-43F3-9FD9-8BC2D29F8C00}"
+EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Sdk", "Sdk", "{FED4267E-E5E4-49C5-98DB-8B3F203596EE}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Microsoft.NET.Sdk.BlazorWebAssembly", "src\Components\WebAssembly\Sdk\src\Microsoft.NET.Sdk.BlazorWebAssembly.csproj", "{6B2734BF-C61D-4889-ABBF-456A4075D59B}"
@@ -1455,6 +1469,12 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "ObjectPool", "ObjectPool",
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.Extensions.ObjectPool", "src\ObjectPool\src\Microsoft.Extensions.ObjectPool.csproj", "{CE5D01C2-6BBD-4F33-A1C4-A1479DA99CAD}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "testassets", "testassets", "{00B2DD87-7E2A-4460-BE1B-5E18B1062B7F}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "InteropClient", "src\Grpc\test\testassets\InteropClient\InteropClient.csproj", "{C3A0F425-669F-46A8-893F-CF449A6DAE56}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "InteropWebsite", "src\Grpc\test\testassets\InteropWebsite\InteropWebsite.csproj", "{19189670-E206-471D-94F8-7D3D545E5020}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -6757,6 +6777,78 @@ Global
 		{157605CB-5170-4C1A-980F-4BAE42DB60DE}.Release|x64.Build.0 = Release|Any CPU
 		{157605CB-5170-4C1A-980F-4BAE42DB60DE}.Release|x86.ActiveCfg = Release|Any CPU
 		{157605CB-5170-4C1A-980F-4BAE42DB60DE}.Release|x86.Build.0 = Release|Any CPU
+		{85D67E40-4B11-48ED-8C43-34590A1FB9ED}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{85D67E40-4B11-48ED-8C43-34590A1FB9ED}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{85D67E40-4B11-48ED-8C43-34590A1FB9ED}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{85D67E40-4B11-48ED-8C43-34590A1FB9ED}.Debug|x64.Build.0 = Debug|Any CPU
+		{85D67E40-4B11-48ED-8C43-34590A1FB9ED}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{85D67E40-4B11-48ED-8C43-34590A1FB9ED}.Debug|x86.Build.0 = Debug|Any CPU
+		{85D67E40-4B11-48ED-8C43-34590A1FB9ED}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{85D67E40-4B11-48ED-8C43-34590A1FB9ED}.Release|Any CPU.Build.0 = Release|Any CPU
+		{85D67E40-4B11-48ED-8C43-34590A1FB9ED}.Release|x64.ActiveCfg = Release|Any CPU
+		{85D67E40-4B11-48ED-8C43-34590A1FB9ED}.Release|x64.Build.0 = Release|Any CPU
+		{85D67E40-4B11-48ED-8C43-34590A1FB9ED}.Release|x86.ActiveCfg = Release|Any CPU
+		{85D67E40-4B11-48ED-8C43-34590A1FB9ED}.Release|x86.Build.0 = Release|Any CPU
+		{C0EF53A5-5A94-4849-86B0-2297EA08D649}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{C0EF53A5-5A94-4849-86B0-2297EA08D649}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{C0EF53A5-5A94-4849-86B0-2297EA08D649}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{C0EF53A5-5A94-4849-86B0-2297EA08D649}.Debug|x64.Build.0 = Debug|Any CPU
+		{C0EF53A5-5A94-4849-86B0-2297EA08D649}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{C0EF53A5-5A94-4849-86B0-2297EA08D649}.Debug|x86.Build.0 = Debug|Any CPU
+		{C0EF53A5-5A94-4849-86B0-2297EA08D649}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{C0EF53A5-5A94-4849-86B0-2297EA08D649}.Release|Any CPU.Build.0 = Release|Any CPU
+		{C0EF53A5-5A94-4849-86B0-2297EA08D649}.Release|x64.ActiveCfg = Release|Any CPU
+		{C0EF53A5-5A94-4849-86B0-2297EA08D649}.Release|x64.Build.0 = Release|Any CPU
+		{C0EF53A5-5A94-4849-86B0-2297EA08D649}.Release|x86.ActiveCfg = Release|Any CPU
+		{C0EF53A5-5A94-4849-86B0-2297EA08D649}.Release|x86.Build.0 = Release|Any CPU
+		{4FDD820F-8397-41B7-956E-F257DD044BD8}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{4FDD820F-8397-41B7-956E-F257DD044BD8}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{4FDD820F-8397-41B7-956E-F257DD044BD8}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{4FDD820F-8397-41B7-956E-F257DD044BD8}.Debug|x64.Build.0 = Debug|Any CPU
+		{4FDD820F-8397-41B7-956E-F257DD044BD8}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{4FDD820F-8397-41B7-956E-F257DD044BD8}.Debug|x86.Build.0 = Debug|Any CPU
+		{4FDD820F-8397-41B7-956E-F257DD044BD8}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{4FDD820F-8397-41B7-956E-F257DD044BD8}.Release|Any CPU.Build.0 = Release|Any CPU
+		{4FDD820F-8397-41B7-956E-F257DD044BD8}.Release|x64.ActiveCfg = Release|Any CPU
+		{4FDD820F-8397-41B7-956E-F257DD044BD8}.Release|x64.Build.0 = Release|Any CPU
+		{4FDD820F-8397-41B7-956E-F257DD044BD8}.Release|x86.ActiveCfg = Release|Any CPU
+		{4FDD820F-8397-41B7-956E-F257DD044BD8}.Release|x86.Build.0 = Release|Any CPU
+		{CA7C7A53-446F-453A-A57B-78BB1443B8A8}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{CA7C7A53-446F-453A-A57B-78BB1443B8A8}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{CA7C7A53-446F-453A-A57B-78BB1443B8A8}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{CA7C7A53-446F-453A-A57B-78BB1443B8A8}.Debug|x64.Build.0 = Debug|Any CPU
+		{CA7C7A53-446F-453A-A57B-78BB1443B8A8}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{CA7C7A53-446F-453A-A57B-78BB1443B8A8}.Debug|x86.Build.0 = Debug|Any CPU
+		{CA7C7A53-446F-453A-A57B-78BB1443B8A8}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{CA7C7A53-446F-453A-A57B-78BB1443B8A8}.Release|Any CPU.Build.0 = Release|Any CPU
+		{CA7C7A53-446F-453A-A57B-78BB1443B8A8}.Release|x64.ActiveCfg = Release|Any CPU
+		{CA7C7A53-446F-453A-A57B-78BB1443B8A8}.Release|x64.Build.0 = Release|Any CPU
+		{CA7C7A53-446F-453A-A57B-78BB1443B8A8}.Release|x86.ActiveCfg = Release|Any CPU
+		{CA7C7A53-446F-453A-A57B-78BB1443B8A8}.Release|x86.Build.0 = Release|Any CPU
+		{B32C5882-2313-40D0-A003-2FF33724CFE6}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{B32C5882-2313-40D0-A003-2FF33724CFE6}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{B32C5882-2313-40D0-A003-2FF33724CFE6}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{B32C5882-2313-40D0-A003-2FF33724CFE6}.Debug|x64.Build.0 = Debug|Any CPU
+		{B32C5882-2313-40D0-A003-2FF33724CFE6}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{B32C5882-2313-40D0-A003-2FF33724CFE6}.Debug|x86.Build.0 = Debug|Any CPU
+		{B32C5882-2313-40D0-A003-2FF33724CFE6}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B32C5882-2313-40D0-A003-2FF33724CFE6}.Release|Any CPU.Build.0 = Release|Any CPU
+		{B32C5882-2313-40D0-A003-2FF33724CFE6}.Release|x64.ActiveCfg = Release|Any CPU
+		{B32C5882-2313-40D0-A003-2FF33724CFE6}.Release|x64.Build.0 = Release|Any CPU
+		{B32C5882-2313-40D0-A003-2FF33724CFE6}.Release|x86.ActiveCfg = Release|Any CPU
+		{B32C5882-2313-40D0-A003-2FF33724CFE6}.Release|x86.Build.0 = Release|Any CPU
+		{26F88A06-319C-43F3-9FD9-8BC2D29F8C00}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{26F88A06-319C-43F3-9FD9-8BC2D29F8C00}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{26F88A06-319C-43F3-9FD9-8BC2D29F8C00}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{26F88A06-319C-43F3-9FD9-8BC2D29F8C00}.Debug|x64.Build.0 = Debug|Any CPU
+		{26F88A06-319C-43F3-9FD9-8BC2D29F8C00}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{26F88A06-319C-43F3-9FD9-8BC2D29F8C00}.Debug|x86.Build.0 = Debug|Any CPU
+		{26F88A06-319C-43F3-9FD9-8BC2D29F8C00}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{26F88A06-319C-43F3-9FD9-8BC2D29F8C00}.Release|Any CPU.Build.0 = Release|Any CPU
+		{26F88A06-319C-43F3-9FD9-8BC2D29F8C00}.Release|x64.ActiveCfg = Release|Any CPU
+		{26F88A06-319C-43F3-9FD9-8BC2D29F8C00}.Release|x64.Build.0 = Release|Any CPU
+		{26F88A06-319C-43F3-9FD9-8BC2D29F8C00}.Release|x86.ActiveCfg = Release|Any CPU
+		{26F88A06-319C-43F3-9FD9-8BC2D29F8C00}.Release|x86.Build.0 = Release|Any CPU
 		{6B2734BF-C61D-4889-ABBF-456A4075D59B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{6B2734BF-C61D-4889-ABBF-456A4075D59B}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{6B2734BF-C61D-4889-ABBF-456A4075D59B}.Debug|x64.ActiveCfg = Debug|Any CPU
@@ -6889,6 +6981,30 @@ Global
 		{CE5D01C2-6BBD-4F33-A1C4-A1479DA99CAD}.Release|x64.Build.0 = Release|Any CPU
 		{CE5D01C2-6BBD-4F33-A1C4-A1479DA99CAD}.Release|x86.ActiveCfg = Release|Any CPU
 		{CE5D01C2-6BBD-4F33-A1C4-A1479DA99CAD}.Release|x86.Build.0 = Release|Any CPU
+		{C3A0F425-669F-46A8-893F-CF449A6DAE56}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{C3A0F425-669F-46A8-893F-CF449A6DAE56}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{C3A0F425-669F-46A8-893F-CF449A6DAE56}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{C3A0F425-669F-46A8-893F-CF449A6DAE56}.Debug|x64.Build.0 = Debug|Any CPU
+		{C3A0F425-669F-46A8-893F-CF449A6DAE56}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{C3A0F425-669F-46A8-893F-CF449A6DAE56}.Debug|x86.Build.0 = Debug|Any CPU
+		{C3A0F425-669F-46A8-893F-CF449A6DAE56}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{C3A0F425-669F-46A8-893F-CF449A6DAE56}.Release|Any CPU.Build.0 = Release|Any CPU
+		{C3A0F425-669F-46A8-893F-CF449A6DAE56}.Release|x64.ActiveCfg = Release|Any CPU
+		{C3A0F425-669F-46A8-893F-CF449A6DAE56}.Release|x64.Build.0 = Release|Any CPU
+		{C3A0F425-669F-46A8-893F-CF449A6DAE56}.Release|x86.ActiveCfg = Release|Any CPU
+		{C3A0F425-669F-46A8-893F-CF449A6DAE56}.Release|x86.Build.0 = Release|Any CPU
+		{19189670-E206-471D-94F8-7D3D545E5020}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{19189670-E206-471D-94F8-7D3D545E5020}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{19189670-E206-471D-94F8-7D3D545E5020}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{19189670-E206-471D-94F8-7D3D545E5020}.Debug|x64.Build.0 = Debug|Any CPU
+		{19189670-E206-471D-94F8-7D3D545E5020}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{19189670-E206-471D-94F8-7D3D545E5020}.Debug|x86.Build.0 = Debug|Any CPU
+		{19189670-E206-471D-94F8-7D3D545E5020}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{19189670-E206-471D-94F8-7D3D545E5020}.Release|Any CPU.Build.0 = Release|Any CPU
+		{19189670-E206-471D-94F8-7D3D545E5020}.Release|x64.ActiveCfg = Release|Any CPU
+		{19189670-E206-471D-94F8-7D3D545E5020}.Release|x64.Build.0 = Release|Any CPU
+		{19189670-E206-471D-94F8-7D3D545E5020}.Release|x86.ActiveCfg = Release|Any CPU
+		{19189670-E206-471D-94F8-7D3D545E5020}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -7604,6 +7720,13 @@ Global
 		{F71FE795-9923-461B-9809-BB1821A276D0} = {60D51C98-2CC0-40DF-B338-44154EFEE2FF}
 		{8294A74F-7DAA-4B69-BC56-7634D93C9693} = {F71FE795-9923-461B-9809-BB1821A276D0}
 		{157605CB-5170-4C1A-980F-4BAE42DB60DE} = {F71FE795-9923-461B-9809-BB1821A276D0}
+		{2531F00A-54EB-4074-9C0B-9AF9FB3679DC} = {0508E463-0269-40C9-B5C2-3B600FB2A28B}
+		{85D67E40-4B11-48ED-8C43-34590A1FB9ED} = {2531F00A-54EB-4074-9C0B-9AF9FB3679DC}
+		{C0EF53A5-5A94-4849-86B0-2297EA08D649} = {2531F00A-54EB-4074-9C0B-9AF9FB3679DC}
+		{4FDD820F-8397-41B7-956E-F257DD044BD8} = {2531F00A-54EB-4074-9C0B-9AF9FB3679DC}
+		{CA7C7A53-446F-453A-A57B-78BB1443B8A8} = {2531F00A-54EB-4074-9C0B-9AF9FB3679DC}
+		{B32C5882-2313-40D0-A003-2FF33724CFE6} = {2531F00A-54EB-4074-9C0B-9AF9FB3679DC}
+		{26F88A06-319C-43F3-9FD9-8BC2D29F8C00} = {2531F00A-54EB-4074-9C0B-9AF9FB3679DC}
 		{FED4267E-E5E4-49C5-98DB-8B3F203596EE} = {562D5067-8CD8-4F19-BCBB-873204932C61}
 		{6B2734BF-C61D-4889-ABBF-456A4075D59B} = {FED4267E-E5E4-49C5-98DB-8B3F203596EE}
 		{83371889-9A3E-4D16-AE77-EB4F83BC6374} = {FED4267E-E5E4-49C5-98DB-8B3F203596EE}
@@ -7618,6 +7741,9 @@ Global
 		{8A59AF88-4A82-46ED-977D-D909001F8107} = {6126DCE4-9692-4EE2-B240-C65743572995}
 		{E235DAAD-FE73-469E-B16F-F2B8E872E217} = {017429CC-C5FB-48B4-9C46-034E29EE2F06}
 		{CE5D01C2-6BBD-4F33-A1C4-A1479DA99CAD} = {E235DAAD-FE73-469E-B16F-F2B8E872E217}
+		{00B2DD87-7E2A-4460-BE1B-5E18B1062B7F} = {E763DA15-8F4E-446C-99B8-309053C75598}
+		{C3A0F425-669F-46A8-893F-CF449A6DAE56} = {00B2DD87-7E2A-4460-BE1B-5E18B1062B7F}
+		{19189670-E206-471D-94F8-7D3D545E5020} = {00B2DD87-7E2A-4460-BE1B-5E18B1062B7F}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {3E8720B3-DBDD-498C-B383-2CC32A054E8F}

src/Components/Components/src/Routing/Router.cs

@@ -68,12 +68,12 @@ static readonly ReadOnlyDictionary<string, object> _emptyParametersDictionary
         /// <summary>
         /// Get or sets the content to display when asynchronous navigation is in progress.
         /// </summary>
-        [Parameter] public RenderFragment Navigating { get; set; }
+        [Parameter] public RenderFragment? Navigating { get; set; }
 
         /// <summary>
         /// Gets or sets a handler that should be called before navigating to a new page.
         /// </summary>
-        [Parameter] public Func<NavigationContext, Task> OnNavigateAsync { get; set; }
+        [Parameter] public Func<NavigationContext, Task>? OnNavigateAsync { get; set; }
 
         private RouteTable Routes { get; set; }
 
@@ -195,10 +195,6 @@ internal virtual void Refresh(bool isNavigationIntercepted)
 
         private async ValueTask<bool> RunOnNavigateAsync(string path, Task previousOnNavigate)
         {
-            if (OnNavigateAsync == null)
-            {
-                return true;
-            }
 
             // Cancel the CTS instead of disposing it, since disposing does not
             // actually cancel and can cause unintended Object Disposed Exceptions.
@@ -210,6 +206,11 @@ private async ValueTask<bool> RunOnNavigateAsync(string path, Task previousOnNav
             // invocation.
             await previousOnNavigate;
 
+            if (OnNavigateAsync == null)
+            {
+                return true;
+            }
+
             _onNavigateCts = new CancellationTokenSource();
             var navigateContext = new NavigationContext(path, _onNavigateCts.Token);
 
@@ -227,14 +228,12 @@ private async ValueTask<bool> RunOnNavigateAsync(string path, Task previousOnNav
                 if (e.CancellationToken != navigateContext.CancellationToken)
                 {
                     var rethrownException = new InvalidOperationException("OnNavigateAsync can only be cancelled via NavigateContext.CancellationToken.", e);
-                    _renderHandle.Render(builder => ExceptionDispatchInfo.Capture(rethrownException).Throw());
-                    return false;
+                    _renderHandle.Render(builder => ExceptionDispatchInfo.Throw(rethrownException));
                 }
             }
             catch (Exception e)
             {
-                _renderHandle.Render(builder => ExceptionDispatchInfo.Capture(e).Throw());
-                return false;
+                _renderHandle.Render(builder => ExceptionDispatchInfo.Throw(e));
             }
 
             return false;

src/Components/Web.Extensions/src/HeadManagement/HeadManagementJSRuntimeExtensions.cs

@@ -0,0 +1,28 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System.Threading.Tasks;
+using Microsoft.JSInterop;
+
+namespace Microsoft.AspNetCore.Components.Web.Extensions.Head
+{
+    internal static class HeadManagementJSRuntimeExtensions
+    {
+        private const string JsFunctionsPrefix = "_blazorHeadManager";
+
+        public static ValueTask SetTitleAsync(this IJSRuntime jsRuntime, string title)
+        {
+            return jsRuntime.InvokeVoidAsync($"{JsFunctionsPrefix}.setTitle", title);
+        }
+
+        public static ValueTask AddOrUpdateHeadTagAsync(this IJSRuntime jsRuntime, TagElement tag, string id)
+        {
+            return jsRuntime.InvokeVoidAsync($"{JsFunctionsPrefix}.addOrUpdateHeadTag", tag, id);
+        }
+
+        public static ValueTask RemoveHeadTagAsync(this IJSRuntime jsRuntime, string id)
+        {
+            return jsRuntime.InvokeVoidAsync($"{JsFunctionsPrefix}.removeHeadTag", id);
+        }
+    }
+}

src/Components/Web.Extensions/src/HeadManagement/HeadTagBase.cs

@@ -0,0 +1,67 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System;
+using System.Collections.Generic;
+using System.Text.Json;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Components.Rendering;
+using Microsoft.JSInterop;
+
+namespace Microsoft.AspNetCore.Components.Web.Extensions.Head
+{
+    /// <summary>
+    /// Serves as a base for components that represent tags in the HTML head.
+    /// </summary>
+    public abstract class HeadTagBase : ComponentBase, IDisposable
+    {
+        private readonly string _id = Guid.NewGuid().ToString("N");
+
+        private TagElement _tagElement;
+
+        private bool _hasRendered;
+
+        [Inject]
+        private IJSRuntime JSRuntime { get; set; } = default!;
+
+        /// <summary>
+        /// Gets or sets a collection of additional attributes that will be applied to the meta element.
+        /// </summary>
+        [Parameter(CaptureUnmatchedValues = true)]
+        public IReadOnlyDictionary<string, object>? Attributes { get; set; }
+
+        /// <summary>
+        /// Gets the name of the tag being represented.
+        /// </summary>
+        protected abstract string TagName { get; }
+
+        /// <inheritdoc />
+        protected override void OnParametersSet()
+        {
+            _tagElement = new TagElement(TagName, Attributes);
+        }
+
+        /// <inheritdoc />
+        protected override async Task OnAfterRenderAsync(bool firstRender)
+        {
+            _hasRendered = true;
+
+            await JSRuntime.AddOrUpdateHeadTagAsync(_tagElement, _id);
+        }
+
+        /// <inheritdoc />
+        protected override void BuildRenderTree(RenderTreeBuilder builder)
+        {
+            builder.AddMarkupContent(0, $"<!--Head:{JsonSerializer.Serialize(_tagElement, JsonSerializerOptionsProvider.Options)}-->");
+        }
+
+        /// <inheritdoc />
+        public void Dispose()
+        {
+            if (_hasRendered)
+            {
+                _ = JSRuntime.RemoveHeadTagAsync(_id);
+            }
+        }
+    }
+}

src/Components/Web.Extensions/src/HeadManagement/Link.cs

@@ -0,0 +1,14 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+namespace Microsoft.AspNetCore.Components.Web.Extensions.Head
+{
+    /// <summary>
+    /// A component that adds a link tag to the HTML head.
+    /// </summary>
+    public sealed class Link : HeadTagBase
+    {
+        /// <inheritdoc />
+        protected override string TagName => "link";
+    }
+}

src/Components/Web.Extensions/src/HeadManagement/Meta.cs

@@ -0,0 +1,14 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+namespace Microsoft.AspNetCore.Components.Web.Extensions.Head
+{
+    /// <summary>
+    /// A component that adds a meta tag to the HTML head.
+    /// </summary>
+    public sealed class Meta : HeadTagBase
+    {
+        /// <inheritdoc />
+        protected override string TagName => "meta";
+    }
+}