.NET <-> Deno Interop

README.md

Following workloads are required on the system:

$ dotnet workload install wasm-tools wasm-experimental # may require sudo

Build & Run:

$ dotnet build
$ deno run --allow-read bin/Debug/net7.0/browser-wasm/AppBundle/myApp.js

Sample output:

MONO_WASM: WebAssembly resource does not have the expected content type "application/wasm", so falling back to slower ArrayBuffer instantiation.
mono_wasm_runtime_ready fe00e07a-5519-4dfe-b35a-f867dbaf2e28
Hello from Deno!
            deno version: 1.29.1
            typescript version: 4.9.4
            v8 version: 10.9.194.5
Hello from C# Console!

DotnetWithDeno.csproj

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>net7.0</TargetFramework>
    <RuntimeIdentifier>browser-wasm</RuntimeIdentifier>
    <WasmMainJSPath>myApp.js</WasmMainJSPath>
    <OutputType>Exe</OutputType>
    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
  </PropertyGroup>
</Project>

myApp.js

import { dotnet } from './dotnet.js'

const { setModuleImports, getAssemblyExports, getConfig } = await dotnet
    .withDiagnosticTracing(false)
    .create();

setModuleImports('MyDenoModule', {
    DenoVersions: () => globalThis.Deno.version
});

const config = getConfig();
const exports = await getAssemblyExports(config.mainAssemblyName);
const text = exports.Fiddle.Greeting();
console.log(text);

await dotnet.run();

Program.cs

using System;
using System.Runtime.Versioning;
using System.Runtime.InteropServices.JavaScript;

[assembly:SupportedOSPlatform("browser")]
public partial class Fiddle
{
    private static void Main () => Console.WriteLine("Hello from C# Console!");

    [JSExport]
    private static string Greeting()
    {
        using JSObject versions = GetDenoVersions(); 

        string text = $@"Hello from Deno!
            deno version: {versions.GetPropertyAsString("deno")}
            typescript version: {versions.GetPropertyAsString("typescript")}
            v8 version: {versions.GetPropertyAsString("v8")}";

        return text;
    }

    [JSImport("DenoVersions", "MyDenoModule")]
    private static partial JSObject GetDenoVersions();
}