Add API to Renderer to trigger a UI refresh on hot reload (#30884)

* Add API to Renderer to trigger a UI refresh on hot reload

Fixes dotnet/aspnetcore#30816

Author: pranavkm

src/Boot.WebAssembly.ts

@@ -38,6 +38,10 @@ async function boot(options?: Partial<WebAssemblyStartOptions>): Promise<void> {
 
   Blazor._internal.InputFile = WasmInputFile;
 
+  Blazor._internal.applyHotReload = (id: string, metadataDelta: string, ilDeta: string) => {
+    DotNet.invokeMethod('Microsoft.AspNetCore.Components.WebAssembly', 'ApplyHotReloadDelta', id, metadataDelta, ilDeta);
+  };
+
   // Configure JS interop
   Blazor._internal.invokeJSFromDotNet = invokeJSFromDotNet;
 

src/GlobalExports.ts

@@ -45,7 +45,8 @@ interface IBlazor {
     readSatelliteAssemblies?: () => System_Array<System_Object>,
     getLazyAssemblies?: any
     dotNetCriticalError?: any
-    getSatelliteAssemblies?: any
+    getSatelliteAssemblies?: any,
+    applyHotReload?: (id: string, metadataDelta: string, ilDelta: string) => void
   }
 }
 
@@ -61,4 +62,4 @@ export const Blazor: IBlazor = {
 };
 
 // Make the following APIs available in global scope for invocation from JS
-window['Blazor'] = Blazor;
+window['Blazor'] = Blazor;