[Home](./index.md) > [@firebase/firestore](./firestore.md) > [lite](./firestore_lite.md) > [collection](./firestore_lite.collection.md) ## collection() function Gets a `CollectionReference` instance that refers to the collection at the specified absolute path. Signature: ```typescript export declare function collection(firestore: FirebaseFirestore, path: string, ...pathSegments: string[]): CollectionReference; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | firestore | [FirebaseFirestore](./firestore_lite.firebasefirestore.md) | A reference to the root Firestore instance. | | path | string | A slash-separated path to a collection. | | pathSegments | string\[\] | Additional path segments to apply relative to the first argument. | Returns: [CollectionReference](./firestore_lite.collectionreference.md)<[DocumentData](./firestore_lite.documentdata.md)> The `CollectionReference` instance. ## Exceptions If the final path has an even number of segments and does not point to a collection.