Puppeteer first test

qaprovider.js

const puppeteer = require('puppeteer');

(async () => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();
  await page.setViewport({
    width: 640,
    height: 480,
    deviceScaleFactor: 1,
  });
  await page.goto('https://qaprovider.com');
  await page.screenshot({path: 'qaprovider640x480.png'});
  await page.setViewport({
    width: 800,
    height: 600,
    deviceScaleFactor: 1,
  });
  await page.screenshot({path: 'qaprovider800x600.png'});
  await page.setViewport({
    width: 1024,
    height: 768,
    deviceScaleFactor: 1,
  });
  await page.screenshot({path: 'qaprovider1024x768.png'});

  await browser.close();
})();