GreaseMonkey Trello Checklist Exporter

Trello Checklist Exporter.js

// ==UserScript==
// @name         Trello Checklist Exporter
// @namespace    https://unitycoder.com/
// @version      1.3
// @description  Export Trello card checklists (visible items only) to plain text,  download as .txt file. See button in Actions list.
// @author       unitycoder_com
// @match        https://trello.com/c/*
// @grant        none
// ==/UserScript==

(function () {
  'use strict';

  function extractChecklistData() {
    const titleEl = document.querySelector('#card-back-name');
    if (!titleEl) return;

    let output = `# ${titleEl.textContent.trim()}\n\n`;

    const checklistSections = document.querySelectorAll('[data-testid="checklist-section"]');
    checklistSections.forEach(section => {
      const checklistTitle = section.querySelector('[data-testid="checklist-title"]');
      output += `### ${checklistTitle?.textContent.trim()}\n`;

      const items = section.querySelectorAll('[data-testid="check-item-container"]');
      items.forEach(item => {
        const isChecked = item.querySelector('input[type="checkbox"]').checked;
        const label = item.querySelector('[data-testid="check-item-name"]');
        if (label?.offsetParent !== null) {
          output += `- [${isChecked ? 'x' : ' '}] ${label.textContent.trim()}\n`;
        }
      });

      output += '\n';
    });

    copyToClipboard(output); // Shows Trello "Copied to clipboard" toast

    const date = new Date();
    const dd = String(date.getDate()).padStart(2, '0');
    const mm = String(date.getMonth() + 1).padStart(2, '0');
    const yyyy = date.getFullYear();
    const formattedDate = `_${dd}${mm}${yyyy}`;

    const filename = `${titleEl.textContent.trim().replace(/[\\/:*?"<>|]/g, "_")}${formattedDate}_checklist.txt`;

    downloadAsTxt(output, filename);
  }

  function copyToClipboard(text) {
    navigator.clipboard.writeText(text).catch(() => {
      const tmp = document.createElement("textarea");
      tmp.style.position = "fixed";
      tmp.style.opacity = "0";
      tmp.value = text;
      document.body.appendChild(tmp);
      tmp.focus();
      tmp.select();
      document.execCommand("copy");
      document.body.removeChild(tmp);
    });
  }

  function downloadAsTxt(content, filename) {
    const blob = new Blob([content], { type: 'text/plain' });
    const link = document.createElement('a');
    link.href = URL.createObjectURL(blob);
    link.download = filename;
    link.style.display = 'none';
    document.body.appendChild(link);
    link.click();
    document.body.removeChild(link);
  }

  function addExportButton() {
  if (document.getElementById('exportChecklistBtn')) return;
  const shareButton = document.querySelector('[data-testid="card-back-share-button"]');
  if (!shareButton) return;

  const btn = document.createElement('button');
  btn.textContent = '📋 Export Checklist';
  btn.id = 'exportChecklistBtn';
  btn.style.margin = '5px';
  btn.style.padding = '5px';
  btn.style.cursor = 'pointer';
  btn.onclick = extractChecklistData;

  // Insert after the share button
  shareButton.parentNode.insertBefore(btn, shareButton.nextSibling);
}


  const observer = new MutationObserver(() => {
    addExportButton();
  });

  observer.observe(document.body, { childList: true, subtree: true });
})();