[Home](./index.md) > [@firebase/database](./database.md) > [enableLogging](./database.enablelogging.md) ## enableLogging() function Signature: ```typescript export function enableLogging( logger?: boolean | ((a: string) => any), persistent?: boolean ): any; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | logger | boolean \| ((a: string) => any) | | | persistent | boolean | | Returns: any