[Blazor] Remove HotReload built-into Blazor WebAssembly (#62777)

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: maraf <[email protected]>

Author: Copilot

src/Components/Web.JS/src/Boot.WebAssembly.Common.ts

@@ -98,17 +98,6 @@ async function startCore(components: RootComponentManager<WebAssemblyComponentDe
     }
   });
 
-  // obsolete:
-  Blazor._internal.applyHotReload = (id: string, metadataDelta: string, ilDelta: string, pdbDelta: string | undefined, updatedTypes?: number[]) => {
-    dispatcher.invokeDotNetStaticMethod('Microsoft.AspNetCore.Components.WebAssembly', 'ApplyHotReloadDelta', id, metadataDelta, ilDelta, pdbDelta, updatedTypes ?? null);
-  };
-
-  Blazor._internal.applyHotReloadDeltas = (deltas: { moduleId: string, metadataDelta: string, ilDelta: string, pdbDelta: string, updatedTypes: number[] }[], loggingLevel: number) => {
-    return dispatcher.invokeDotNetStaticMethod('Microsoft.AspNetCore.Components.WebAssembly', 'ApplyHotReloadDeltas', deltas, loggingLevel) ?? [];
-  };
-
-  Blazor._internal.getApplyUpdateCapabilities = () => dispatcher.invokeDotNetStaticMethod('Microsoft.AspNetCore.Components.WebAssembly', 'GetApplyUpdateCapabilities') ?? '';
-
   // Configure JS interop
   Blazor._internal.invokeJSJson = invokeJSJson;
   Blazor._internal.endInvokeDotNetFromJS = endInvokeDotNetFromJS;

src/Components/Web.JS/src/GlobalExports.ts

@@ -92,11 +92,6 @@ export interface IBlazor {
 
     // APIs invoked by hot reload
 
-    // obsolete:
-    applyHotReload?: (id: string, metadataDelta: string, ilDelta: string, pdbDelta: string | undefined, updatedTypes?: number[]) => void;
-
-    applyHotReloadDeltas?: (deltas: { moduleId: string, metadataDelta: string, ilDelta: string, pdbDelta: string, updatedTypes: number[] }[], loggingLevel: number) => {message: string, severity: number}[];
-    getApplyUpdateCapabilities?: () => string;
     hotReloadApplied?: () => void;
   }
 }

src/Components/WebAssembly/WebAssembly/src/Hosting/WebAssemblyHost.cs

@@ -2,11 +2,9 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 using System.Diagnostics.CodeAnalysis;
-using System.Reflection.Metadata;
 using Microsoft.AspNetCore.Components.Infrastructure;
 using Microsoft.AspNetCore.Components.Web;
 using Microsoft.AspNetCore.Components.Web.Infrastructure;
-using Microsoft.AspNetCore.Components.WebAssembly.HotReload;
 using Microsoft.AspNetCore.Components.WebAssembly.Infrastructure;
 using Microsoft.AspNetCore.Components.WebAssembly.Rendering;
 using Microsoft.AspNetCore.Components.WebAssembly.Services;
@@ -139,11 +137,6 @@ internal async Task RunAsyncCore(CancellationToken cancellationToken, WebAssembl
         manager.SetPlatformRenderMode(RenderMode.InteractiveWebAssembly);
         await manager.RestoreStateAsync(store);
 
-        if (MetadataUpdater.IsSupported && Environment.GetEnvironmentVariable("__BLAZOR_WEBASSEMBLY_LEGACY_HOTRELOAD") != "false")
-        {
-            await WebAssemblyHotReload.InitializeAsync();
-        }
-
         var tcs = new TaskCompletionSource();
         using (cancellationToken.Register(() => tcs.TrySetResult()))
         {

src/Components/WebAssembly/WebAssembly/src/HotReload/WebAssemblyHotReload.cs

@@ -1,24 +1,8 @@
 #nullable enable
 Microsoft.AspNetCore.Components.WebAssembly.Hosting.WebAssemblyHostBuilder.UseServiceProviderOptions(Microsoft.Extensions.DependencyInjection.ServiceProviderOptions! options) -> Microsoft.AspNetCore.Components.WebAssembly.Hosting.WebAssemblyHostBuilder!
 Microsoft.AspNetCore.Components.WebAssembly.Hosting.WebAssemblyHostBuilderExtensions
-Microsoft.AspNetCore.Components.WebAssembly.HotReload.WebAssemblyHotReload.Delta
-Microsoft.AspNetCore.Components.WebAssembly.HotReload.WebAssemblyHotReload.Delta.Delta() -> void
-Microsoft.AspNetCore.Components.WebAssembly.HotReload.WebAssemblyHotReload.Delta.ILDelta.get -> byte[]!
-Microsoft.AspNetCore.Components.WebAssembly.HotReload.WebAssemblyHotReload.Delta.ILDelta.init -> void
-Microsoft.AspNetCore.Components.WebAssembly.HotReload.WebAssemblyHotReload.Delta.MetadataDelta.get -> byte[]!
-Microsoft.AspNetCore.Components.WebAssembly.HotReload.WebAssemblyHotReload.Delta.MetadataDelta.init -> void
-Microsoft.AspNetCore.Components.WebAssembly.HotReload.WebAssemblyHotReload.Delta.ModuleId.get -> string!
-Microsoft.AspNetCore.Components.WebAssembly.HotReload.WebAssemblyHotReload.Delta.ModuleId.init -> void
-Microsoft.AspNetCore.Components.WebAssembly.HotReload.WebAssemblyHotReload.Delta.PdbDelta.get -> byte[]!
-Microsoft.AspNetCore.Components.WebAssembly.HotReload.WebAssemblyHotReload.Delta.PdbDelta.init -> void
-Microsoft.AspNetCore.Components.WebAssembly.HotReload.WebAssemblyHotReload.Delta.UpdatedTypes.get -> int[]!
-Microsoft.AspNetCore.Components.WebAssembly.HotReload.WebAssemblyHotReload.Delta.UpdatedTypes.init -> void
-Microsoft.AspNetCore.Components.WebAssembly.HotReload.WebAssemblyHotReload.LogEntry
-Microsoft.AspNetCore.Components.WebAssembly.HotReload.WebAssemblyHotReload.LogEntry.LogEntry() -> void
-Microsoft.AspNetCore.Components.WebAssembly.HotReload.WebAssemblyHotReload.LogEntry.Message.get -> string!
-Microsoft.AspNetCore.Components.WebAssembly.HotReload.WebAssemblyHotReload.LogEntry.Message.init -> void
-Microsoft.AspNetCore.Components.WebAssembly.HotReload.WebAssemblyHotReload.LogEntry.Severity.get -> int
-Microsoft.AspNetCore.Components.WebAssembly.HotReload.WebAssemblyHotReload.LogEntry.Severity.init -> void
 static Microsoft.AspNetCore.Components.WebAssembly.Hosting.WebAssemblyHostBuilderExtensions.UseDefaultServiceProvider(this Microsoft.AspNetCore.Components.WebAssembly.Hosting.WebAssemblyHostBuilder! builder, System.Action<Microsoft.AspNetCore.Components.WebAssembly.Hosting.IWebAssemblyHostEnvironment!, Microsoft.Extensions.DependencyInjection.ServiceProviderOptions!>! configure) -> Microsoft.AspNetCore.Components.WebAssembly.Hosting.WebAssemblyHostBuilder!
 static Microsoft.AspNetCore.Components.WebAssembly.Hosting.WebAssemblyHostBuilderExtensions.UseDefaultServiceProvider(this Microsoft.AspNetCore.Components.WebAssembly.Hosting.WebAssemblyHostBuilder! builder, System.Action<Microsoft.Extensions.DependencyInjection.ServiceProviderOptions!>! configure) -> Microsoft.AspNetCore.Components.WebAssembly.Hosting.WebAssemblyHostBuilder!
-static Microsoft.AspNetCore.Components.WebAssembly.HotReload.WebAssemblyHotReload.ApplyHotReloadDeltas(Microsoft.AspNetCore.Components.WebAssembly.HotReload.WebAssemblyHotReload.Delta[]! deltas, int loggingLevel) -> Microsoft.AspNetCore.Components.WebAssembly.HotReload.WebAssemblyHotReload.LogEntry[]!
+*REMOVED*Microsoft.AspNetCore.Components.WebAssembly.HotReload.WebAssemblyHotReload
+*REMOVED*static Microsoft.AspNetCore.Components.WebAssembly.HotReload.WebAssemblyHotReload.ApplyHotReloadDelta(string! moduleIdString, byte[]! metadataDelta, byte[]! ilDelta, byte[]! pdbBytes, int[]? updatedTypes) -> void
+*REMOVED*static Microsoft.AspNetCore.Components.WebAssembly.HotReload.WebAssemblyHotReload.GetApplyUpdateCapabilities() -> string!

src/Components/WebAssembly/WebAssembly/src/PublicAPI.Unshipped.txt

@@ -2,7 +2,6 @@
   <PropertyGroup>
     <BlazorWebAssemblyJSPath>$(MSBuildThisFileDirectory)blazor.webassembly.js</BlazorWebAssemblyJSPath>
     <BlazorRoutingEnableRegexConstraint Condition="'$(BlazorRoutingEnableRegexConstraint)' == ''">false</BlazorRoutingEnableRegexConstraint>
-    <WebAssemblyHotReloadCapabilities>Baseline;AddMethodToExistingType;AddStaticFieldToExistingType;NewTypeDefinition;ChangeCustomAttributes;AddInstanceFieldToExistingType;GenericAddMethodToExistingType;GenericUpdateMethod;UpdateParameters;GenericAddFieldToExistingType</WebAssemblyHotReloadCapabilities>
   </PropertyGroup>
 
   <ItemGroup>