Bulk delete every custom emoji in Slack

slack-emoji-bulk-delete.js

//
// I just found out that we have a bunch of NSFW emoji in our bulk-imported set of >4000 emoji.
// Rather than weed them out, I want to start with a blank slate. This code does that.
//
// Navigate to your "Custom Emoji" page, the one with all the delete buttons.
// Delete one of them and acknowledge that it's going away forever.
// Then open the JavaScript console and paste this in.
//
// At some point your JavaScript console will start spewing errors.
// Reload the Emoji page, delete one emoji by hand again, and paste this in again to resume.
//
// Thanks to slifty for a June 2020 update!

function killer() {
  let emojirows = document.getElementsByClassName("c-virtual_list__item");
  for (let e of emojirows) {
      let rem = e.querySelector("button [emoji-type=enabled]");
      rem.click();
      let confirmButton = document.getElementsByClassName("c-button--danger")[0].click();
      return;
  }
}

ki = setInterval(killer, 1500); // they rate limit now

I had some issues where it would try to click the confirm button before it actually showed.
I had some success with this:

let intervalId;
intervalId = setInterval(() => {
  let deleteButton = document.querySelector("button [emoji-type=enabled]");
  if (!deleteButton) {
    clearInterval(intervalId);
    console.log("Bulk emoji delete completed!");
  } else {
    deleteButton.click();
    setTimeout(() => document.getElementsByClassName("c-button--danger")[0].click(), 300);
  }
}, 2000);

I had ~600 emojis to clear and this deletes faster than the list can load, so I often had to refresh and run it again.
It didn't take long though.