Gmail currently restricts certain file attachments (e.g. .exe, .msc, and .bat) for security reasons, and starting on February 13, 2017, we will not allow .js file attachments as well. Similar to other restricted file attachments, you will not be able to attach a .js file and an in-product warning will appear, explaining the reason why.
If you still need to send .js files for legitimate reasons, you can use Google Drive, Google Cloud Storage, or other storage solutions to share or send your files.
Launch Details
Release track:
Launching to Rapid release on February 13, 2017, with Scheduled release coming 2 weeks afterward
Editions:
Available to all G Suite editions
Rollout pace:
Full rollout (1-3 days for feature visibility)
Impact:
All end users
Action:
Change management suggested/FYI
More Information
Gmail: Some file types are blocked
If you still need to send .js files for legitimate reasons, you can use Google Drive, Google Cloud Storage, or other storage solutions to share or send your files.
Launch Details
Release track:
Launching to Rapid release on February 13, 2017, with Scheduled release coming 2 weeks afterward
Editions:
Available to all G Suite editions
Rollout pace:
Full rollout (1-3 days for feature visibility)
Impact:
All end users
Action:
Change management suggested/FYI
More Information
Gmail: Some file types are blocked