voluptasmollitia/docs-exp/database.ondisconnect.update.md

Monorepo for the Firebase JavaScript SDK

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[Home](./index.md) &gt; [@firebase/database](./database.md) &gt; [OnDisconnect](./database.ondisconnect.md) &gt; [update](./database.ondisconnect.update.md)

## OnDisconnect.update() method

Writes multiple values at this location when the client is disconnected (due to closing the browser, navigating to a new page, or network issues).

The `values` argument contains multiple property-value pairs that will be written to the Database together. Each child property can either be a simple property (for example, "name") or a relative path (for example, "name/first") from the current location to the data to update.

As opposed to the `set()` method, `update()` can be use to selectively update only the referenced properties at the current location (instead of replacing all the child properties at the current location).

<b>Signature:</b>

```typescript
update(values: object): Promise<void>;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  values | object | Object containing multiple values. |

<b>Returns:</b>

Promise&lt;void&gt;

Resolves when synchronization to the Database is complete.