class DriveApp method .getFolderById()

DriveApp is the Apps Script service.

.getFolderById() is the method name you will see after a dot in your code.

What it does

Loads a Drive folder by its folder ID.

Why it's used

  • Drop exports into a shared team folder by ID.
  • List or clean up files inside a specific client folder.

Common errors

  • Forgetting parentheses on getFolderById. Write DriveApp.getFolderById(), not DriveApp.getFolderById or getFolderById by itself.
  • Skipping dots between chained calls. Each step needs a dot, like DriveApp.getFileById(id).getFolderById().
  • Adding spaces where they do not belong. Write DriveApp.getFolderById(), not DriveApp .getFolderById(), DriveApp.getFolderById (), or DriveApp . getFolderById().
  • Wrong capitalization. Use DriveApp and getFolderById, not driveapp or getfolderbyid.

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