getLinks.js

const Nightmare = require('nightmare')
const nightmare = Nightmare({ show: false })

// go to the page
// gather all the links from top of the box office
const getLinks = nightmare
  .goto('https://www.rottentomatoes.com')
  .wait('body')
  .evaluate(() => {
    const gatherLinks = category =>
      Array.from(
        document
          .getElementById(category)
          .getElementsByClassName('sidebarInTheaterOpening')
      ).map(movie => movie.querySelector('a').href)

    let openingThisWeek = gatherLinks('homepage-opening-this-week')
    let topOfTheBoxOffice = gatherLinks('homepage-top-box-office')

    return [
      { 'opening this week': openingThisWeek },
      { 'top of the box office': topOfTheBoxOffice }
    ]
  })
  .end()
  .then(result => {
    console.log(result)
  })
  .catch(err => console.error(err))

module.exports = getLinks