voluptasmollitia/docs-exp/firestore_.querysnapshot.docchanges.md

Monorepo for the Firebase JavaScript SDK

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[Home](./index.md) &gt; [@firebase/firestore](./firestore.md) &gt; [/](./firestore_.md) &gt; [QuerySnapshot](./firestore_.querysnapshot.md) &gt; [docChanges](./firestore_.querysnapshot.docchanges.md)

## QuerySnapshot.docChanges() method

Returns an array of the documents changes since the last snapshot. If this is the first snapshot, all documents will be in the list as 'added' changes.

<b>Signature:</b>

```typescript
docChanges(options?: SnapshotListenOptions): Array<DocumentChange<T>>;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  options | [SnapshotListenOptions](./firestore_.snapshotlistenoptions.md) | <code>SnapshotListenOptions</code> that control whether metadata-only changes (i.e. only <code>DocumentSnapshot.metadata</code> changed) should trigger snapshot events. |

<b>Returns:</b>

Array&lt;[DocumentChange](./firestore_.documentchange.md)<!-- -->&lt;T&gt;&gt;