jnu-eclass-pdf-autodownload.js

function sleep(ms) {
  const wakeUpTime = Date.now() + ms;
  while (Date.now() < wakeUpTime) {}
}
for (var i=0; i<##_NUMBER_##; i++) {
    var a = document.createElement('a')
    localSynap.movePage(i+1)
    a.href=document.getElementById('page'+i).src
    a.download = i+'.png'
    document.body.appendChild(a)
    a.click()
    sleep(1000)
}