[Home](./index.md) > [@firebase/firestore](./firestore.md) > [/](./firestore_.md) > [DocumentChangeType](./firestore_.documentchangetype.md) ## DocumentChangeType type The type of a `DocumentChange` may be 'added', 'removed', or 'modified'. Signature: ```typescript export declare type DocumentChangeType = 'added' | 'removed' | 'modified'; ```