Programming language: Rust
License: Apache License 2.0
Tags: Development Tools     FFI     Node.js    
Latest version: v0.5.3
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Rust bindings for writing safe and fast native Node.js modules.

Getting started

Once you have the platform dependencies installed, getting started is as simple as:

$ npm init neon my-project

Then see the Hello World guide for writing your first Hello World in Neon!


See our Neon fundamentals docs and our API docs.

Neon 0.10 Migration Guide

The latest version of Neon, 0.10, includes a few small breaking changes in order to clean up and improve the usability of our APIs.

Read the new migration guide to learn how to port your Neon projects to 0.10!

Platform Support

Operating Systems

Linux macOS Windows


Node 12 Node 14 Node 16

Support for LTS versions of Node and current are expected. If you're using a different version of Node and believe it should be supported, let us know.


Neon supports Rust stable version 1.18 and higher. We test on the latest stable, beta, and nightly versions of Rust.

A Taste...

fn make_an_array(mut cx: FunctionContext) -> JsResult<JsArray> {
    // Create some values:
    let n = cx.number(9000);
    let s = cx.string("hello");
    let b = cx.boolean(true);

    // Create a new array:
    let array: Handle<JsArray> = cx.empty_array();

    // Push the values into the array:
    array.set(&mut cx, 0, n)?;
    array.set(&mut cx, 1, s)?;
    array.set(&mut cx, 2, b)?;

    // Return the array:

register_module!(mut cx, {
    cx.export_function("makeAnArray", make_an_array)

For more examples, see our examples repo.

Get Involved

The Neon community is just getting started and there's tons of fun to be had. Come play! :)

The Rust Bindings community Slack is open to all; use the Slackin app to receive an invitation.

Testing Neon

The Neon project is both an NPM workspace and a Cargo workspace. The full suite of tests may be executed by installing and testing the NPM workspace.

npm install
npm test

Individual JavaScript packages may be tested with an npm workspace command:

npm --workspace=create-neon test

Individual Rust crates may be tested with a cargo workspace command:

cargo test -p neon-build


Licensed under either of

at your option.

*Note that all licence references and agreements mentioned in the neon README section above are relevant to that project's source code only.