voluptasmollitia/docs-exp/database.limittolast.md

Monorepo for the Firebase JavaScript SDK

<!-- Do not edit this file. It is automatically generated by API Documenter. -->

[Home](./index.md) &gt; [@firebase/database](./database.md) &gt; [limitToLast](./database.limittolast.md)

## limitToLast() function

Creates a new `QueryConstraint` that is limited to return only the last specified number of children.

The `limitToLast()` method is used to set a maximum number of children to be synced for a given callback. If we set a limit of 100, we will initially only receive up to 100 `child_added` events. If we have fewer than 100 messages stored in our Database, a `child_added` event will fire for each message. However, if we have over 100 messages, we will only receive a `child_added` event for the last 100 ordered messages. As items change, we will receive `child_removed` events for each item that drops out of the active list so that the total number stays at 100.

You can read more about `limitToLast()` in [Filtering data](https://firebase.google.com/docs/database/web/lists-of-data#filtering_data)<!-- -->.

<b>Signature:</b>

```typescript
export declare function limitToLast(limit: number): QueryConstraint;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  limit | number | The maximum number of nodes to include in this query. |

<b>Returns:</b>

[QueryConstraint](./database.queryconstraint.md)