[Home](./index.md) > [@firebase/firestore](./firestore.md) > [/](./firestore_.md) > [DocumentSnapshot](./firestore_.documentsnapshot.md) > [exists](./firestore_.documentsnapshot.exists.md) ## DocumentSnapshot.exists() method Property of the `DocumentSnapshot` that signals whether or not the data exists. True if the document exists. Signature: ```typescript exists(): this is QueryDocumentSnapshot; ``` Returns: this is [QueryDocumentSnapshot](./firestore_.querydocumentsnapshot.md)<T>