nodejs-mobile-react-native/install/resources/nodejs-modules/builtin_modules/rn-bridge/index.js

Node.js for Mobile Apps React Native plugin

const EventEmitter = require('events');
var mybridgeaddon = process.binding('rn_bridge');

class MyEmitter extends EventEmitter {}
MyEmitter.prototype.send=function(msg) {
  mybridgeaddon.sendMessage(msg);
};

const channel = new MyEmitter();

var myListener = mybridgeaddon.registerListener( function(msg) {
  setImmediate( () => {
    channel.emit('message', msg);
  });
});

exports.channel = channel;