node-webrtc provides Node.js bindings to WebRTC M73. You can write Node.js applications that use RTCDataChannels with it. Some MediaStream APIs are supported. For examples, see node-webrtc-examples.

This library will attempt to download pre-compiled binaries for your particular platform using node-pre-gyp; however, if binaries are unavailable, it will fallback to building from source using node-cmake. When building from source, in addition to the prerequisites required by node-cmake, you will need

• Git
• CMake 3.12 or newer
• GCC 5.4 or newer (Linux)
• Xcode 9 or newer (macOS)
• Microsoft Visual Studio 2017 (Windows)
• Any additional prerequisites listed by WebRTC

The easiest way to install is via npm:

npm install wrtc

If you want to work from source, run

git clone https://github.com/js-platform/node-webrtc.git
cd node-webrtc
npm install

Depending on what you checkout, npm install will either download a pre-compiled binary or attempt to build from source. Set SKIP_DOWNLOAD=true to always build from source. See below for more information on building from source.

If you would like to build node-webrtc from source, run

./node_modules/.bin/ncmake rebuild

You can pass either --debug or --release to build a debug or release build of node-webrtc (and the underlying WebRTC library). Refer to node-cmake for additional command-line options to ncmake.

On Linux, we statically link libc++ and libc++abi. Also, although we compile WebRTC sources with Clang (downloaded as part of WebRTC's build process), we compile node-webrtc sources with GCC 5.4 or newer.

In order to cross-compile for armv7l on Linux,

1. Set TARGET_ARCH to "arm".
2. Install the appropriate toolchain, and set ARM_TOOLS_PATH.
3. On Ubuntu, you may also need g++-arm-linux-gnueabihf.

wget https://releases.linaro.org/components/toolchain/binaries/7.3-2018.05/arm-linux-gnueabihf/gcc-linaro-7.3.1-2018.05-x86_64_arm-linux-gnueabihf.tar.xz
tar xf gcc-linaro-7.3.1-2018.05-x86_64_arm-linux-gnueabihf.tar.xz
SKIP_DOWNLOAD=true TARGET_ARCH=arm ARM_TOOLS_PATH=$(pwd)/gcc-linaro-7.3.1-2018.05-x86_64_arm-linux-gnueabihf npm install

In order to cross-compile for arm64 on Linux,

1. Set TARGET_ARCH to "arm64".
2. Install the appropriate toolchain, and set ARM_TOOLS_PATH.
3. On Ubuntu, you may also need g++-aarch64-linux-gnu.

wget https://releases.linaro.org/components/toolchain/binaries/7.3-2018.05/aarch64-linux-gnu/gcc-linaro-7.3.1-2018.05-x86_64_aarch64-linux-gnu.tar.xz
tar xf gcc-linaro-7.3.1-2018.05-x86_64_aarch64-linux-gnu.tar.xz
SKIP_DOWNLOAD=true TARGET_ARCH=arm64 ARM_TOOLS_PATH=$(pwd)/gcc-linaro-7.3.1-2018.05-x86_64_aarch64-linux-gnu npm install

On macOS, we compile WebRTC sources with the version of Clang downloaded as part of WebRTC's build process, but we compile node-webrtc sources using the system Clang.

On Windows, we do not compile WebRTC sources with Clang. This is disabled by passing is_clang=false to gn gen.

Once everything is built, run

npm test

web-platform-tests/wpt defines a suite of WebRTC tests. node-webrtc borrows a technique from jsdom/jsdom to run these tests in Node.js. Run the tests with

npm run wpt:test

These tests are run by Circle CI to ensure node-webrtc remains compatible with the latest versions of Chrome and Firefox.

npm run test:browsers