---
title: containerIdentifier
framework: CloudKit JS
role: symbol
role_heading: Instance Property
platforms: [cloudkit js 1.0+]
path: cloudkitjs/cloudkit.notification/containeridentifier
---

# containerIdentifier

The identifier of the container that generated this notification.

## Declaration

```data
readonly attribute String containerIdentifier;
```

## See Also

### Getting Identifiers

- [notificationID](cloudkitjs/cloudkit.notification/notificationid.md)
- [subscriptionID](cloudkitjs/cloudkit.notification/subscriptionid.md)
- [zoneID](cloudkitjs/cloudkit.notification/zoneid.md)