Puppteer example

gistfile1.txt

const puppeteer = require('puppeteer-extra')
const StealthPlugin = require('puppeteer-extra-plugin-stealth')

puppeteer.use(StealthPlugin)

;(async () => {
  const browser = await puppeteer.launch({
    headless: false,
    executablePath: '/Applications/Google Chrome.app/Contents/MacOS/Google Chrome'
  })
  const page = await browser.newPage()
  await page.setViewport({ width: 1080, height: 1024 })
  await page.goto('', { waitUntil: 'networkidle2' })
  await page.waitForSelector('[aria-label="subject answer container"]')
  await autoScroll(page);
  await page.click('[aria-label="subject answer container"] > div > div:nth-child(3)')
  await page.click('button[data-qa="submit"]')
})();

function sleep(ms) {
  return new Promise(resolve => setTimeout(resolve, ms));
}

async function autoScroll(page){
  await page.evaluate(async () => {
    await new Promise(resolve => {
      let totalHeight = 0;
      var distance = 100;
      var timer = setInterval(() => {
        var scrollHeight = document.body.scrollHeight;
        window.scrollBy(0, distance);
        totalHeight += distance;

        if (totalHeight >= scrollHeight - window.innerHeight){
          clearInterval(timer);
          resolve();
        }
      }, 100)
    })
  })
}