[Home](./index.md) > [@firebase/database](./database.md) > [Reference](./database.reference.md) > [push](./database.reference.push.md) ## Reference.push() method Signature: ```typescript push(value?: any, onComplete?: (a: Error | null) => any): ThenableReference; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | value | any | | | onComplete | (a: Error \| null) => any | | Returns: [ThenableReference](./database.thenablereference.md)