mass delete Steam screenshots on your profile

deleteSteamScreenshots.js

/*
 Go to your screenshot page, set view as Image Wall,
 press F12, then go to console to paste this code.
 The browser tab should be visible on the monitor.
 I highly recommend moving them to a corner where you can't see
 the screenshots as the page scrolls, as you won't see them ever again.

 When the page eventually refreshes and says an error occured,
 keep the page open until you see no more number changes on your profile.
 */
(theNumber => {
  // get total number of screenshots displayed
  const getTrackedNumber = () =>
    document.getElementsByClassName('profile_media_item').length
  // scroll down the page every second until the number hit
  const keepScrollingDown = setInterval(() => {
    window.scrollTo(0, document.body.scrollHeight)
    stopIfNumberHit(theNumber)
  }, 1000)
  /*
   check if the total number of screenshots reached certain number,
   then if it did, select all of them and confirm deleting them.
   */
  const stopIfNumberHit = n => {
    if (getTrackedNumber() < n)
      return false

    clearInterval(keepScrollingDown)
    ToggleManagementMode()
    SelectAllScreenshots()
    ConfirmBatchAction('delete')
    $('BatchScreenshotManagement').submit()
  }
})(1000) // set the number here. usually it stops after around 800.