[Home](./index.md) > [@firebase/database](./database.md) > [Reference](./database.reference.md) > [setPriority](./database.reference.setpriority.md) ## Reference.setPriority() method Signature: ```typescript setPriority( priority: string | number | null, onComplete: (a: Error | null) => any ): Promise; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | priority | string \| number \| null | | | onComplete | (a: Error \| null) => any | | Returns: Promise<any>