add js emscripten injection.

src/Web/Avalonia.Web.Sample/Avalonia.Web.Sample.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFramework>net7.0</TargetFramework>
     <RuntimeIdentifier>browser-wasm</RuntimeIdentifier>
@@ -6,6 +6,9 @@
     <OutputType>Exe</OutputType>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <MSBuildEnableWorkloadResolver>true</MSBuildEnableWorkloadResolver>
+    <WasmBuildNative>true</WasmBuildNative>
+    <EmccFlags>-sVERBOSE</EmccFlags>
+    <EmccExtraLDFlags>--js-library="C:\Users\User\repos\Avalonia\src\Web\Avalonia.Web.Sample\interop.js"</EmccExtraLDFlags>
   </PropertyGroup>
 
   <ItemGroup>

src/Web/Avalonia.Web.Sample/Program.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Runtime.InteropServices;
 using System.Runtime.InteropServices.JavaScript;
 using System.Threading.Tasks;
 using Avalonia.Web;
@@ -6,10 +7,22 @@ using Avalonia.Web;
 
 internal class Program
 {
+
+    [DllImport("libSkiaSharp", CallingConvention = CallingConvention.Cdecl)]
+    static extern JSObject example_initialize();
     private static void Main(string[] args)
     {
         Console.WriteLine("Hello, Browser!");
 
+        example_initialize();
+
+        Console.WriteLine();
+        
+
+        foreach(var arg in args)
+        {
+            Console.WriteLine(arg);
+        }
         AvaloniaRuntime.Init(); 
     }
 }

src/Web/Avalonia.Web.Sample/interop.js

@@ -0,0 +1,13 @@
+var LibraryExample = {
+    // Internal functions
+    $EXAMPLE: {
+        internal_func: function () {
+        }
+    },
+    example_initialize: function () {
+        window["avalonia-helper-GL"] = GL
+    }
+}
+
+autoAddDeps(LibraryExample, '$EXAMPLE')
+mergeInto(LibraryManager.library, LibraryExample)