whats.js

var express = require('express'),
    http = require('http');
var app = express();
var server = http.createServer(app);
var io = require('socket.io').listen(server);

const puppeteer = require('puppeteer');
const URL = "https://web.whatsapp.com";
let browser;
let page;
let isLogin = false;

let socks = [];

app.use(express.static('public'));
server.listen(3000);


async function start() {
  browser = await puppeteer.launch({headless: false});
  page = await browser.newPage();

  await page.goto(URL, {waitUntil: 'networkidle'});
  let sel = "#app > div > div > div > div.entry-main > div.qr-wrapper-container > div > img";
  await page.waitFor(sel);

  let ja = await page.evaluate(() => {
      let sel = "#app > div > div > div > div.entry-main > div.qr-wrapper-container > div > img";
      const element = document.querySelector(sel).src;
      return element;
  });

  page.on('console', msg => {
      console.log(msg);
  });
  return ja;
}

let pol = () => {
  page.evaluate(() => {
      setInterval(() => {
        if(Store)
          console.log("login");
        else
          console.log("NO login");
        console.log("check");


        //  Store.ProfilePicThumb.find( nr + '@c.us').then(function(d){
        Store.Wap.statusFind('[email protected]').then(function(d){
            console.log(d.status);
        }, function(e){
            console.log("fout");
        });



        // d.
        Store.Presence.find( '[email protected]').then(function(d) {
            console.log(">>>");
            console.log(d);
            console.log(">>>");

            console.log(d.t);
            if (d.isOnline)
                console.log('isOnline');
            else
                console.log('isOffline');
        });
      }, 1000);
  }).then( () => {
      console.log("done");
  });
}

io.on('connection', function (socket) {
    socket.emit('data', { mijn: 'world' });
    io.emit('data', 'verbonden');
    socket.on('qr', function (data) {
      console.log("-->");
      start().then((qr) => {
          console.log("hallo");
          pol();
          io.emit('data', {"qr": qr});
      });
    });
});