[Home](./index.md) > [@firebase/firestore](./firestore.md) > [lite](./firestore_lite.md) > [CollectionReference](./firestore_lite.collectionreference.md) > [parent](./firestore_lite.collectionreference.parent.md) ## CollectionReference.parent property A reference to the containing `DocumentReference` if this is a subcollection. If this isn't a subcollection, the reference is null. Signature: ```typescript get parent(): DocumentReference | null; ```