Remove all saved (deleted) messages from your saved view in Slack

ClearSlackSavedDeletedMessages.js

// Remove all saved (deleted) messages from your saved view in Slack

// Open Slack in a web browser and log in
// Go to your Saved/Later messages screen
// Click on either In Progress, Archived, or Completed for the list you want to delete.
// F12 to raise dev console
// Paste the below
// Wait a while till it does its thing. If you need to stop it, close the tab.

(async function deleteDeletedLaterItems() {
  const BATCH_SIZE = 25;
  const CLICK_DELAY = 250;
  const MODAL_DELAY = 200;
  const SCROLL_DELAY = 500;
  const MAX_SCROLL_RETRIES = 5;

  const sleep = (ms) => new Promise(resolve => setTimeout(resolve, ms));

  const getTombstones = () =>
    Array.from(document.querySelectorAll('.c-message_kit__tombstone'))
      .filter(el => el.offsetParent !== null);

  const scrollToBottom = () => {
    const scrollArea = document.querySelector('.p-saved_for_later_page__list_wrapper .c-scrollbar__hider');
    if (scrollArea) {
      scrollArea.scrollTop = scrollArea.scrollHeight;
    } else {
      window.scrollTo(0, document.body.scrollHeight);
    }
  };

  const refreshList = async (lastCount) => {
    let retries = 0;
    while (retries < MAX_SCROLL_RETRIES) {
      scrollToBottom();
      await sleep(SCROLL_DELAY);

      const newTombstones = getTombstones();
      if (newTombstones.length > lastCount) {
        return;
      }

      retries++;
    }
  };

  let totalProcessed = 0;

  while (true) {
    let tombstones = getTombstones();
    if (tombstones.length === 0) {
      console.log('[Slack Deleted Message Remover] No visible tombstones. Trying to scroll and refresh...');
      await refreshList(0);
      tombstones = getTombstones();
      if (tombstones.length === 0) {
        console.log('[Slack Deleted Message Remover] Still no tombstones. Done!');
        break;
      }
    }

    for (let i = 0; i < tombstones.length && i < BATCH_SIZE; i++) {
      const itemNum = totalProcessed + 1;
      console.log(`[Slack Deleted Message Remover] Processing item ${itemNum}`);
      tombstones[i].click();
      await sleep(MODAL_DELAY);

      const modal = document.querySelector('.ReactModal__Content--after-open');
      if (modal) {
        const removeBtn = Array.from(modal.querySelectorAll('button')).find(btn => btn.textContent.trim() === 'Remove');
        if (removeBtn) {
          removeBtn.click();
          console.log(`[Slack Deleted Message Remover] Removed item ${itemNum}`);
        } else {
          console.warn(`[Slack Deleted Message Remover] Remove button not found for item ${itemNum}`);
        }
      } else {
        console.warn(`[Slack Deleted Message Remover] Modal not found for item ${itemNum}`);
      }

      totalProcessed++;
      await sleep(CLICK_DELAY);
    }

    console.log(`[Slack Deleted Message Remover] Processed ${totalProcessed} items, refreshing list...`);
    await refreshList(getTombstones().length);
  }

  console.log('[Slack Deleted Message Remover] Done!');
})();

Inspired from https://gist.github.com/programmerdave/238f083cc6ca9e6fe89748fe6339c199