Puppeteer Notes

const browser = await puppeteer.launch({
  headless: false
})

await page.focus('#username')
await page.keyboard.type(config.username)
await page.focus('#password')
await page.keyboard.type(config.password)
await page.click('#log-in')

const result = await page.evaluate(() => {
  const elements = document.querySelectorAll('.item')
  const items = Array.from(elements).map((element) => {
    const property = {
      url: element.href,
      description: element.textContent
    }
    return property
  })
  return items
})

const result = await page.$$eval('.item', (elements) => {
  const items = elements.map((element) => {
    const property = {
      url: element.href,
      description: element.textContent
    }
    return property
  })
  return items
})

const elements = await page.$$('.item')
const items = []

for (const element of elements) {
  const url = await element.evaluate((element) => element.href)
  const description = await element.evaluate((element) => element.textContent)
  const property = { url, description }
  items.push(property)
}

await page.waitForSelector('#something-taking-time-to-appear')

await page.waitFor(() => {
  return document.querySelector('#something') !== null
})