voluptasmollitia/docs-exp/firestore_.writebatch.set.md

Monorepo for the Firebase JavaScript SDK

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[Home](./index.md) &gt; [@firebase/firestore](./firestore.md) &gt; [/](./firestore_.md) &gt; [WriteBatch](./firestore_.writebatch.md) &gt; [set](./firestore_.writebatch.set.md)

## WriteBatch.set() method

Writes to the document referred to by the provided [DocumentReference](./firestore_.documentreference.md)<!-- -->. If the document does not exist yet, it will be created.

<b>Signature:</b>

```typescript
set<T>(documentRef: DocumentReference<T>, data: T): WriteBatch;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  documentRef | [DocumentReference](./firestore_.documentreference.md)<!-- -->&lt;T&gt; | A reference to the document to be set. |
|  data | T | An object of the fields and values for the document. |

<b>Returns:</b>

[WriteBatch](./firestore_.writebatch.md)

This `WriteBatch` instance. Used for chaining method calls.