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

# environment

The version of the app’s container. Possible values are CloudKit.DEVELOPMENT_ENVIRONMENT and CloudKit.PRODUCTION_ENVIRONMENT.

## Declaration

```data
attribute String environment;
```