---
title: configure
framework: CloudKit JS
role: symbol
role_heading: Instance Method
platforms: [cloudkit js 1.0+]
path: cloudkitjs/cloudkit/configure
---

# configure

Configures CloudKit JS.

## Declaration

```data
CloudKit configure(
	CloudKit.CloudKitConfig config
);
```

## Parameters

- `config`: The properties to use to initialize CloudKit JS.

## Return Value

Return Value The configured CloudKit object.

## Discussion

Discussion For each container that you access, specify the container ID, API token, and environment. CloudKit.configure({     containers: [{         containerIdentifier: '[insert your container ID here]',         apiTokenAuth: {             apiToken: '[insert your API token and other authentication properties here]'         },         environment: 'development'     }] }); Other CloudKit.ContainerConfig.apiTokenAuth keys, such as the persist key, are optional. To keep the user signed in after closing and reopening the browser, set persist to true. CloudKit.configure({     containers: [{         // ...         apiTokenAuth: {             apiToken: '[insert your API token and other authentication properties here]',             persist: true         }     }] }); To customize the sign in and sign out buttons, add signInButton and signOutButton keys to the auth dictionary. For more container and service configuration options, see CloudKit.CloudKitConfig in CloudKit JS Data Types.