Project: /docs/reference/js/_project.yaml
Book: /docs/reference/_book.yaml
page_type: reference
{% comment %}
DO NOT EDIT THIS FILE!
This is generated by the JS SDK team, and any local changes will be
overwritten. Changes should be made in the source code at
https://github.com/firebase/firebase-js-sdk
{% endcomment %}
# PersistentLocalCache interface
Provides a persistent cache backed by IndexedDb to the SDK.
To use, create an instance using the factory function , then set the instance to `FirestoreSettings.cache` and call `initializeFirestore` using the settings object.
Signature:
```typescript
export declare interface PersistentLocalCache
```
## Properties
| Property | Type | Description |
| --- | --- | --- |
| [kind](./firestore_.persistentlocalcache.md#persistentlocalcachekind) | 'persistent' | |
## PersistentLocalCache.kind
Signature:
```typescript
kind: 'persistent';
```