Get Instagram URLs by hashtag

index.js

function getURLsByHashtag(hashtag) {
  let count = 0
  let urls = []

  return (function makeRequest(maxId = '') {
    return fetch(`https://www.instagram.com/explore/tags/${hashtag}/?__a=1&max_id=${maxId}`)
      .then(res => res.json())
      .then(res => {
        console.log(++count)

        if (res.tag.media.count > 0) {
          urls = urls.concat(res.tag.media.nodes.map(n => 'https://www.instagram.com/p/' + n.code))
        }

        if (res.tag.media.page_info.has_next_page) {
          const maxId = res.tag.media.page_info.end_cursor
          return makeRequest(maxId)
        } else {
          return urls
        }
      })
  })()
}

getURLsByHashtag('enterhashtag')
  .then(urls => document.body.innerHTML = urls.join('<br>'))