[Home](./index.md) > [@firebase/firestore](./firestore.md) > [lite](./firestore_lite.md) > [DocumentSnapshot](./firestore_lite.documentsnapshot.md) > [exists](./firestore_lite.documentsnapshot.exists.md) ## DocumentSnapshot.exists() method Signals whether or not the document at the snapshot's location exists. Signature: ```typescript exists(): this is QueryDocumentSnapshot; ``` Returns: this is [QueryDocumentSnapshot](./firestore_lite.querydocumentsnapshot.md)<T> true if the document exists.