Files in Folder list as HTML

function listFilesInFolder(folderId) {
  try {
    // Open the folder using the folderId
    const folder = DriveApp.getFolderById(folderId);
    const files = folder.getFiles();

    // HTML structure
    let htmlOutput = '<ul>';

    while (files.hasNext()) {
      const file = files.next();
      const fileName = file.getName();
      const fileSize = (file.getSize() / (1024 * 1024)).toFixed(2) + ' MB'; // Convert size to MB
      const fileUrl = file.getUrl();

      // Check if the file is a PDF
      const isPdf = file.getMimeType() === 'application/pdf';

      // Append to HTML
      htmlOutput += `<li>
        <a href="${fileUrl}" target="_blank">${fileName}</a> 
        (Size: ${fileSize}, Type: ${isPdf ? 'PDF' : 'Other'})
      </li>`;
    }

    htmlOutput += '</ul>';
    return htmlOutput;

  } catch (e) {
    console.error(e.toString());
    return `Error: ${e.toString()}`;
  }
}