[Home](./index.md) > [@firebase/firestore](./firestore.md) > [lite](./firestore_lite.md) > [DocumentSnapshot](./firestore_lite.documentsnapshot.md) ## DocumentSnapshot class A `DocumentSnapshot` contains data read from a document in your Firestore database. The data can be extracted with `.data()` or `.get()` to get a specific field. For a `DocumentSnapshot` that points to a non-existing document, any data access will return 'undefined'. You can use the `exists()` method to explicitly verify a document's existence. Signature: ```typescript export declare class DocumentSnapshot ``` ## Constructors | Constructor | Modifiers | Description | | --- | --- | --- | | [(constructor)()](./firestore_lite.documentsnapshot._constructor_.md) | | Constructs a new instance of the DocumentSnapshot class | ## Properties | Property | Modifiers | Type | Description | | --- | --- | --- | --- | | [id](./firestore_lite.documentsnapshot.id.md) | | string | Property of the DocumentSnapshot that provides the document's ID. | | [ref](./firestore_lite.documentsnapshot.ref.md) | | [DocumentReference](./firestore_lite.documentreference.md)<T> | The DocumentReference for the document included in the DocumentSnapshot. | ## Methods | Method | Modifiers | Description | | --- | --- | --- | | [data()](./firestore_lite.documentsnapshot.data.md) | | Retrieves all fields in the document as an Object. Returns undefined if the document doesn't exist. | | [exists()](./firestore_lite.documentsnapshot.exists.md) | | Signals whether or not the document at the snapshot's location exists. | | [get(fieldPath)](./firestore_lite.documentsnapshot.get.md) | | Retrieves the field specified by fieldPath. Returns undefined if the document or field doesn't exist. |