[Home](./index.md) > [@firebase/database](./database.md) > [ListenOptions](./database.listenoptions.md) ## ListenOptions interface An options objects that can be used to customize a listener. Signature: ```typescript export declare interface ListenOptions ``` ## Properties | Property | Type | Description | | --- | --- | --- | | [onlyOnce?](./database.listenoptions.onlyonce.md) | boolean | (Optional) Whether to remove the listener after its first invocation. |