wip

Author: pavelsavara

src/libraries/System.Runtime.InteropServices.JavaScript/src/System/Runtime/InteropServices/JavaScript/Interop/JavaScriptExports.CoreCLR.cs

@@ -146,7 +146,6 @@ public static void BindAssemblyExports(JSMarshalerArgument* argumentsBuffer)
             }
         }
 
-#pragma warning disable IDE0060
         [UnmanagedCallersOnly(EntryPoint = "SystemInteropJS_CallJSExport")]
         public static void CallJSExport(int methodHandle, JSMarshalerArgument* argumentsBuffer)
         {

src/libraries/System.Runtime.InteropServices.JavaScript/src/System/Runtime/InteropServices/JavaScript/JSHostImplementation.CoreCLR.cs

@@ -65,7 +65,7 @@ public static unsafe JSFunctionBinding BindManagedFunction(string fullyQualified
                 wrapperInfo.Invoke(null, new object?[] { boxedLegacyArgs });
             };
 
-            int methodHandle = ctx.s_JSExportByHandle.Count;
+            int methodHandle = ctx.NextJSExportHandle++;
             ctx.s_JSExportByHandle[methodHandle] = wrapper;
 
             var signature = GetMethodSignature(signatures, null, null);

src/libraries/System.Runtime.InteropServices.JavaScript/src/System/Runtime/InteropServices/JavaScript/JSProxyContext.cs

@@ -24,6 +24,7 @@ internal sealed class JSProxyContext : IDisposable
         private nint NextJSVHandle = -2;
         private readonly List<nint> JSVHandleFreeList = new();
         internal Dictionary<int, Action<IntPtr>> s_JSExportByHandle = new Dictionary<int, Action<IntPtr>>();
+        internal int NextJSExportHandle = 1;
 
 #if !FEATURE_WASM_MANAGED_THREADS
         private JSProxyContext()

src/native/corehost/browserhost/host/host.ts

@@ -105,6 +105,9 @@ export async function runMain(mainAssemblyName?: string, args?: string[]): Promi
     if (!mainAssemblyName) {
         mainAssemblyName = config.mainAssemblyName!;
     }
+    if (!mainAssemblyName.endsWith(".dll")) {
+        mainAssemblyName += ".dll";
+    }
     const mainAssemblyNamePtr = dotnetBrowserUtilsExports.stringToUTF8Ptr(mainAssemblyName) as any;
 
     if (!args) {