Solution

ReferenceError: Gmail is not defined

zerocool0713 2021. 2. 17. 15:07
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Enable the Gmail API advanced service in your script.

 

Advanced Google services  |  Apps Script  |  Google Developers

The advanced services in Apps Script let experienced developers connect to certain public Google APIs with less set-up than using their HTTP interfaces. Advanced services are essentially thin wrappers around those Google APIs. They work much like Apps Scri

developers.google.com

 

Enable advanced services

To use an advanced Google service, follow these instructions:

  1. Open the Apps Script project.
  2. At the left, click Editor .
  3. At the left, next to Services, click Add a service .
  4. Select an advanced Google service and click Add.

 

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