Node.jsでGoogle Driveの指定フォルダからファイル一覧を取得メモ (Google Drive API v3)

async function listFiles(auth) {
  const drive = google.drive({version: 'v3', auth});
  const FOLDER_ID = `xxxxxxxxxxxxxxxxxxxxxxxxxxxxx`; //ここにフォルダIDを指定
  const params = {
    q: `'${FOLDER_ID}' in parents and trashed = false`,
  }

  try {
    const res = await drive.files.list(params);
    const files = res.data.files;
    if (files.length) {
      console.log('Files:');
      files.map((file) => {
        console.log(`${file.name} (${file.id})`);
      });
    } else {
      console.log('No files found.');
    }    
  } catch (err) {
    console.log('The API returned an error: ' + err);
  }
}