[Home](./index.md) > [@firebase/database](./database.md) > [DataSnapshot](./database.datasnapshot.md) ## DataSnapshot interface Signature: ```typescript export interface DataSnapshot ``` ## Properties | Property | Type | Description | | --- | --- | --- | | [key](./database.datasnapshot.key.md) | string \| null | | | [ref](./database.datasnapshot.ref.md) | [Reference](./database.reference.md) | | ## Methods | Method | Description | | --- | --- | | [child(path)](./database.datasnapshot.child.md) | | | [exists()](./database.datasnapshot.exists.md) | | | [exportVal()](./database.datasnapshot.exportval.md) | | | [forEach(action)](./database.datasnapshot.foreach.md) | | | [getPriority()](./database.datasnapshot.getpriority.md) | | | [hasChild(path)](./database.datasnapshot.haschild.md) | | | [hasChildren()](./database.datasnapshot.haschildren.md) | | | [numChildren()](./database.datasnapshot.numchildren.md) | | | [toJSON()](./database.datasnapshot.tojson.md) | | | [val()](./database.datasnapshot.val.md) | |