[Home](./index.md) > [@firebase/database](./database.md) > [Database](./database.database.md) ## Database interface Signature: ```typescript export interface Database ``` ## Properties | Property | Type | Description | | --- | --- | --- | | [app](./database.database.app.md) | FirebaseApp | | ## Methods | Method | Description | | --- | --- | | [goOffline()](./database.database.gooffline.md) | | | [goOnline()](./database.database.goonline.md) | | | [ref(path)](./database.database.ref.md) | | | [refFromURL(url)](./database.database.reffromurl.md) | | | [useEmulator(host, port)](./database.database.useemulator.md) | |