Export Blazor.platform for back-compat. Covers #1157

src/Microsoft.AspNetCore.Blazor.Browser.JS/src/Boot.WebAssembly.ts

@@ -12,6 +12,7 @@ import { fetchBootConfigAsync, loadEmbeddedResourcesAsync } from './BootCommon';
 async function boot() {
   // Configure environment for execution under Mono WebAssembly with shared-memory rendering
   const platform = Environment.setPlatform(monoPlatform);
+  window['Blazor'].platform = platform;
   window['Blazor']._internal.renderBatch = (browserRendererId: number, batchAddress: Pointer) => {
     renderBatch(browserRendererId, new SharedMemoryRenderBatch(batchAddress));
   };

src/Microsoft.AspNetCore.Blazor.Browser.JS/src/GlobalExports.ts

@@ -6,7 +6,6 @@ import { Pointer } from './Platform/Platform';
 
 // Make the following APIs available in global scope for invocation from JS
 window['Blazor'] = {
-  platform,
   navigateTo,
 
   _internal: {