[Home](./index.md) > [@firebase/firestore](./firestore.md) > [lite](./firestore_lite.md) > [deleteField](./firestore_lite.deletefield.md) ## deleteField() function Returns a sentinel for use with [updateDoc()](./firestore_lite.updatedoc.md) or [setDoc()](./firestore_lite.setdoc.md) with `{merge: true}` to mark a field for deletion. Signature: ```typescript export declare function deleteField(): FieldValue; ``` Returns: [FieldValue](./firestore_lite.fieldvalue.md)