Programmatically delete scrobbles from a Last.fm library page

deleteScrobbles.js

/**
 * Delete all (or some of) the scrobbles on a Last.fm library page
 * (e.g. https://www.last.fm/user/USERNAME/library)
 *
 * @param {Number} [count=0] Number of scrobbles on page to delete
 * @param {Number} [start=0] Index to start deleting from
 *
 * @example
 * // delete first 20 scrobbles on page
 * deleteScrobbles(20)
 *
 * // delete fifth track on page
 * deleteScrobbles(1, 4)
 */
function deleteScrobbles (count = 0, start = 0) {
  // collect delete buttons from document
  const els = document.getElementsByClassName('more-item--delete')
  // make sure we’re not deleting more scrobbles than are on the page
  start = Math.min(start, els.length - 1)
  const end = start + Math.min(count, els.length - start)
  // click on each delete button
  for (let i = start; i < end; i++) {
    els[i].click()
  }
}