Hacky script for bulk deleting FB timeline activities (posts)

fbactivityclean.js

// use on the page https://www.facebook.com/YOUR_USER_NAME/allactivity?privacy_source=activity_log&log_filter=cluster_11
// scroll down to as many posts you want to delete (make pencil icons visible)
// recommended to delete small batches as the process gets really slow for many deletes in parallel (UI issues)
// we do stuff in parallel because a single delete can take up to 7 seconds
// to launch, call deletePost()

var knownPencils={};
function deletePost() {
  var pencils=document.querySelectorAll('[data-testid="pencil_icon_link"]');
  var pencilFound=false;

  for (var j=0; j<pencils.length && !pencilFound; j++) {
    var pencil=pencils[j];
    if (!knownPencils[pencil.id]) {
      knownPencils[pencil.id]=true;
      pencil.click();
      pencilFound=true;

      var delbtns=document.querySelectorAll('[ajaxify^="/ajax/timeline/delete"]');
      for (var i=0; i<delbtns.length; i++) {
        var btn=delbtns[i];
        if (btn.offsetParent!=null) {
          console.log("delete button:",btn);
          btn.click();
          setTimeout(function() {
            var confirmBtns=document.querySelectorAll('.uiOverlayButton.layerConfirm');
            var confirmBtn=confirmBtns[confirmBtns.length-1];
            console.log("confirm button:",confirmBtn);
            confirmBtn.click();

            setTimeout(deletePost, 100);
          },500);
        }
      }
    }
  }
}

@mntmn Cool, could it be modified to delete from the activity log as well?