[Home](./index.md) > [@firebase/database](./database.md) > [Reference](./database.reference.md) ## Reference interface Signature: ```typescript export interface Reference extends Query ``` Extends: [Query](./database.query.md) ## Properties | Property | Type | Description | | --- | --- | --- | | [key](./database.reference.key.md) | string \| null | | | [parent](./database.reference.parent.md) | [Reference](./database.reference.md) \| null | | | [root](./database.reference.root.md) | [Reference](./database.reference.md) | | ## Methods | Method | Description | | --- | --- | | [child(path)](./database.reference.child.md) | | | [onDisconnect()](./database.reference.ondisconnect.md) | | | [push(value, onComplete)](./database.reference.push.md) | | | [remove(onComplete)](./database.reference.remove.md) | | | [set(value, onComplete)](./database.reference.set.md) | | | [setPriority(priority, onComplete)](./database.reference.setpriority.md) | | | [setWithPriority(newVal, newPriority, onComplete)](./database.reference.setwithpriority.md) | | | [transaction(transactionUpdate, onComplete, applyLocally)](./database.reference.transaction.md) | | | [update(values, onComplete)](./database.reference.update.md) | |