Universal Date Picker date selector puppeteer script

datePickerSelectDate.js

// answered at: https://stackoverflow.com/questions/63796579/use-puppeteer-to-select-by-text/63819936#63819936

let calendarGridItemCount =  await page.$$eval('.calendar-grid > ul > li', el => el.length)
let calMonthYear = await page.$eval('.calendar-monthname', month => month.innerText)
let calDays = await page.$$eval('.calendar-grid > ul > li', days => days.map(d => d.innerText))
let today = new Date()
today.setHours(0, 0, 0, 0)

let sevenDaysLater = new Date()
sevenDaysLater.setDate(today.getDate() + 7)
sevenDaysLater.setHours(0,0,0,0)
// 1600207200000  (Wed Sep 16 2020 00:00:00 GMT+0200 (Central European Summer Time))

const wantedDate = Date.parse(sevenDaysLater)

  for (let i = 0; i < calendarGridItemCount; i++) {
    let examinedCalendarGridItem = Date.parse(`${calDays[i]} ${calMonthYear}`)
    if (examinedCalendarGridItem == wantedDate) {
      const dayFound = (await page.$$('.calendar-grid > ul > li'))[i]
      await dayFound.click()
      break
    } else if (examinedCalendarGridItem !== wantedDate && i === calendarGridItemCount - 1) {
      await page.click('.calendar-next')
      calendarGridItemCount = await page.$$eval('.calendar-grid > ul > li', el => el.length)
      calMonthYear = await page.$eval('.calendar-monthname', month => month.innerText)
      calDays = await page.$$eval('.calendar-grid > ul > li', days => days.map(d => d.innerText))
      i = 0
      continue
    }
  }