Node API for .NET: JavaScript + .NET Interop

This project enables advanced interoperability between .NET and JavaScript in the same process.

• Load .NET assemblies and call .NET APIs in-proc from a JavaScript application.
• Load JavaScript packages and call JS APIs in-proc from a .NET application.

Interop is high-performance and supports TypeScript type-definitions generation, async (tasks/promises), streams, and more. It uses Node API so it is compatible with any Node.js version (without recompiling) or other JavaScript runtime that supports Node API.

⚠️ Status: Public Preview - Most functionality works well, though there are some known limitations around the edges, and there may still be minor breaking API changes.

Documentation

Getting-started guidance, feature details, and API reference documentation are published at https://microsoft.github.io/node-api-dotnet

Minimal example - JS calling .NET

// JavaScript
const Console = require('node-api-dotnet').System.Console;
Console.WriteLine('Hello from .NET!'); // JS writes to the .NET console API

Minimal example - .NET calling JS

// C#
interface IConsole { void Log(string message); }

var nodejs = new NodejsPlatform(libnodePath).CreateEnvironment();
nodejs.Run(() =>
{
    var console = nodejs.Import<IConsole>("global", "console");
    console.Log("Hello from JS!"); // C# writes to the JS console API
});

Packages

Depending on the scenario, either NPM or NuGet packages may be used:

• NPM: node-api-dotnet
• NuGet: Microsoft.JavaScript.NodeApi

See Packages & Releases for details.

Development

For information about building, testing, and debugging this project, see README-DEV.md.

Contributions require agreement to the Contributor License Agreement.

Code of Conduct

This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact opencode@microsoft.com with any additional questions or comments.

Trademarks

This project may contain trademarks or logos for projects, products, or services. Authorized use of Microsoft trademarks or logos is subject to and must follow Microsoft's Trademark & Brand Guidelines. Use of Microsoft trademarks or logos in modified versions of this project must not cause confusion or imply Microsoft sponsorship. Any use of third-party trademarks or logos are subject to those third-party's policies.