Project: /docs/reference/js/_project.yaml Book: /docs/reference/_book.yaml page_type: reference {% comment %} DO NOT EDIT THIS FILE! This is generated by the JS SDK team, and any local changes will be overwritten. Changes should be made in the source code at https://github.com/firebase/firebase-js-sdk {% endcomment %} # ThenableReference interface A `Promise` that can also act as a `DatabaseReference` when returned by [push()](./database.md#push_c74661c). The reference is available immediately and the `Promise` resolves as the write to the backend completes. Signature: ```typescript export declare interface ThenableReference extends DatabaseReference, Pick, 'then' | 'catch'> ``` Extends: [DatabaseReference](./database.databasereference.md#databasereference_interface), Pick<Promise<[DatabaseReference](./database.databasereference.md#databasereference_interface)>, 'then' \| 'catch'> ## Properties | Property | Type | Description | | --- | --- | --- | | [key](./database.thenablereference.md#thenablereferencekey) | string | | | [parent](./database.thenablereference.md#thenablereferenceparent) | [DatabaseReference](./database.databasereference.md#databasereference_interface) | | ## ThenableReference.key Signature: ```typescript key: string; ``` ## ThenableReference.parent Signature: ```typescript parent: DatabaseReference; ```