Function ensureChildrenLoaded

public/js/folderManager.js:1383–1450

(folder, ulEl)

  updateToggleForOption(folder, hasKids);
}
async function ensureChildrenLoaded(folder, ulEl) {
  let cached = _childCache.get(folder);
  if (cached && typeof cached.then === 'function') {
    cached = await cached;
  }
  let items, nextCursor;
  if (cached) { items = cached.items; nextCursor = cached.nextCursor; }
  else {
    const res = await fetchChildrenOnce(folder);
    items = res.items; nextCursor = res.nextCursor; _childCache.set(folder, { items, nextCursor });
  }

  if (!ulEl._renderedOnce) {
    items.forEach(it => {
      const li = makeChildLi(folder, it);
      ulEl.appendChild(li);
      const full = (folder === 'root') ? it.name : `${folder}/${it.name}`;
      try { applyFolderColorToOption(full, (window.folderColorMap||{})[full] || ''); } catch (e) {}
      ensureFolderIcon(full);
    });
    ulEl._renderedOnce = true;
  }

  let moreLi = ulEl.querySelector('.load-more');
  if (nextCursor && !moreLi) {
    moreLi = document.createElement('li');
    moreLi.className = 'load-more';
  
    const btn = document.createElement('button');
    btn.type = 'button';
    btn.className = 'btn btn-ghost';
    btn.textContent = t('load_more') || 'Load more';
    btn.setAttribute('aria-label', t('load_more') || 'Load more');
    if (ulEl.id) btn.setAttribute('aria-controls', ulEl.id);
  
    btn.addEventListener('click', async (e) => {
      const b = e.currentTarget;
      const prevText = b.textContent;
      b.disabled = true;
      b.setAttribute('aria-busy', 'true');
      b.textContent = t('loading') || 'Loading…';
  
      try {
        await loadMoreChildren(folder, ulEl, moreLi);
      } finally {
        // If the "load more" node still exists (wasn't removed because we reached end),
        // restore the button state.
        if (moreLi.isConnected) {
          b.disabled = false;
          b.removeAttribute('aria-busy');
          b.textContent = t('load_more') || 'Load more';
        }
      }
    });
  
    moreLi.appendChild(btn);
    ulEl.appendChild(moreLi);