const puppeteer = require('puppeteer');
const cl = 0

async function getPic() {
  const browser = await puppeteer.launch({headless: false});
  const page = await browser.newPage();
  while (cl < 1) {
  await page.goto('https://google.com');
  await page.setViewport({width: 1000, height: 500})
  await page.screenshot({path: 'google.png'});
  }
}

getPic();

const puppeteer = require('puppeteer');

(async () => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();
  await page.setViewport({ width: 640, height: 480, deviceScaleFactor: 1 });

  let shotNum = 0
  let interval = setInterval(/*async*/() => {
    /*await*/ page.screenshot({ path: `example.png${shotNum++}` })
  }, 500);

  page.goto('https://example.com', {
    //https://pptr.dev/#?product=Puppeteer&version=v5.0.0&show=api-pagewaitfornavigationoptions
    waitUntil: "domcontentloaded" //"networkidle2" //"networkidle0" //"load"
  }).then(async () => {
    clearInterval(interval)
    await browser.close();
  })
})();