# getLocalStorageItem

## `this.getLocalStorageItem` Function

#### Description

With this method, a value previously stored in the browser’s **localStorage** can be retrieved. The function also checks whether the stored item has expired (based on its TTL) and automatically removes it if expired.

If the item is still valid, its expiration time is **renewed**, keeping it active for the same TTL duration again.

***

#### Parameters

| Name  | Type     | Description                                               |
| ----- | -------- | --------------------------------------------------------- |
| `key` | `String` | The key under which the item is stored in `localStorage`. |

***

#### Returns

| Type           | Description                                                                        |
| -------------- | ---------------------------------------------------------------------------------- |
| `Any` / `null` | Returns the value if the item exists and is not expired, otherwise returns `null`. |

***

#### Usage Example

```javascript
var value = this.getLocalStorageItem("my_test_key");
```

Retrieves the value previously stored under the key `"my_test_key"`.\
If the item exists and is still valid (not expired), the value is returned. Otherwise, `null` is returned.

***

#### Important Notes

* If the item is not found or has expired, the function returns `null`.
* If the TTL or expiry is missing (e.g., due to older format), the function will apply the current system default TTL.
* When a valid item is returned, its **expiration is updated**, extending its validity.
* The function checks if `localStorage` is available using `jentis.helper.bIsLocalStorageAvailable`.
* Do not use this function inside nested functions where the `this` context might be lost.