[Home](./index.md) > [@firebase/firestore](./firestore.md) > [/](./firestore_.md) > [QuerySnapshot](./firestore_.querysnapshot.md) > [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. Signature: ```typescript docChanges(options?: SnapshotListenOptions): Array>; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | options | [SnapshotListenOptions](./firestore_.snapshotlistenoptions.md) | SnapshotListenOptions that control whether metadata-only changes (i.e. only DocumentSnapshot.metadata changed) should trigger snapshot events. | Returns: Array<[DocumentChange](./firestore_.documentchange.md)<T>>