webrtc-node

WebRTC data channels for Node.js, backed by libdatachannel and validated with 620 selected Web Platform Tests subtests.

npm install @mertushka/webrtc-node

Usage

const { RTCPeerConnection } = require("@mertushka/webrtc-node");

const pc = new RTCPeerConnection({ iceServers: [] });
const channel = pc.createDataChannel("events");

channel.addEventListener("open", () => {
  channel.send("hello from Node");
});

channel.addEventListener("message", (event) => {
  console.log(event.data);
});

See examples/datachannel.js for a complete local offer/answer exchange.

Supported Platforms

Node.js 20 or newer is required. The npm package downloads a matching Node-API prebuild when available, verifies its SHA-256 digest and target, then falls back to a cmake-js source build.

OS	Prebuild targets	Node 20	Node 22	Node 24
Linux	x64 glibc, x64 musl	✅	✅	✅
macOS	x64, arm64	✅	✅	✅
Windows	x64, arm64	✅	✅	✅

Source builds require CMake, a C++17 compiler, and OpenSSL development libraries.

Performance Snapshot

Local benchmark snapshots show this package ahead on binary throughput and object operation rates. Benchmarks are environment-sensitive; treat them as directional rather than a substitute for testing your workload.

Metric	webrtc-node	node-datachannel	@roamhq/wrtc
Linux binary 8 KiB x1000	39.9 MB/s	30.4 MB/s	27.4 MB/s
Linux construct+close PC	53k ops/s	3.2k ops/s	200 ops/s
Linux negotiated DC create+close	2.2k ops/s	974 ops/s	173 ops/s

Contributing

Read CONTRIBUTING.md before opening a pull request. Public API changes should update runtime code, TypeScript declarations, tests, and WPT documentation together.

License

Mozilla Public License 2.0. See LICENSE.