firebase-js-sdk/docs-devsite/auth.reactnativeasyncstorage.md

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 %}

# ReactNativeAsyncStorage interface
Interface for a supplied `AsyncStorage`<!-- -->.

<b>Signature:</b>

```typescript
export interface ReactNativeAsyncStorage 
```

## Methods

|  Method | Description |
|  --- | --- |
|  [getItem(key)](./auth.reactnativeasyncstorage.md#reactnativeasyncstoragegetitem) | Retrieve an item from storage. |
|  [removeItem(key)](./auth.reactnativeasyncstorage.md#reactnativeasyncstorageremoveitem) | Remove an item from storage. |
|  [setItem(key, value)](./auth.reactnativeasyncstorage.md#reactnativeasyncstoragesetitem) | Persist an item in storage. |

## ReactNativeAsyncStorage.getItem()

Retrieve an item from storage.

<b>Signature:</b>

```typescript
getItem(key: string): Promise<string | null>;
```

#### Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  key | string | storage key. |

<b>Returns:</b>

Promise&lt;string \| null&gt;

## ReactNativeAsyncStorage.removeItem()

Remove an item from storage.

<b>Signature:</b>

```typescript
removeItem(key: string): Promise<void>;
```

#### Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  key | string | storage key. |

<b>Returns:</b>

Promise&lt;void&gt;

## ReactNativeAsyncStorage.setItem()

Persist an item in storage.

<b>Signature:</b>

```typescript
setItem(key: string, value: string): Promise<void>;
```

#### Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  key | string | storage key. |
|  value | string | storage value. |

<b>Returns:</b>

Promise&lt;void&gt;