@red-mobile/nodejs-mobile-cordova/install/sample-project/www/nodejs-project/main.js

Node.js for Mobile Apps Cordova plugin

// Require the 'cordova-bridge' to enable communications between the
// Node.js app and the Cordova app.
const cordova = require("cordova-bridge");

// Send a message to Cordova.
cordova.channel.send("main.js loaded");

// Post an event to Cordova.
cordova.channel.post("started");

// Post an event with a message.
cordova.channel.post("started", "main.js loaded");

// A sample object to show how the channel supports generic
// JavaScript objects.
class Reply {
  constructor(replyMsg, originalMsg) {
    this.reply = replyMsg;
    this.original = originalMsg;
  }
}

// Listen to messages from Cordova.
cordova.channel.on("message", (msg) => {
  console.log('[node] MESSAGE received: "%s"', msg);
  // Reply sending a user defined object.
  cordova.channel.send(new Reply("Message received!", msg));
});

// Listen to event 'myevent' from Cordova.
cordova.channel.on("myevent", (msg) => {
  console.log('[node] MYEVENT received with message: "%s"', msg);
});

// Handle the 'pause' and 'resume' events.
// These are events raised automatically when the app switched to the
// background/foreground.
cordova.app.on("pause", (pauseLock) => {
  console.log("[node] app paused.");
  pauseLock.release();
});

cordova.app.on("resume", () => {
  console.log("[node] app resumed.");
  cordova.channel.post("engine", "resumed");
});