voluptasmollitia/docs-exp/firestore_.setoptions.md

Monorepo for the Firebase JavaScript SDK

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[Home](./index.md) &gt; [@firebase/firestore](./firestore.md) &gt; [/](./firestore_.md) &gt; [SetOptions](./firestore_.setoptions.md)

## SetOptions type

An options object that configures the behavior of [setDoc()](./firestore_lite.setdoc.md)<!-- -->,  and  calls. These calls can be configured to perform granular merges instead of overwriting the target documents in their entirety by providing a `SetOptions` with `merge: true`<!-- -->.

<b>Signature:</b>

```typescript
export declare type SetOptions = {
    readonly merge?: boolean;
} | {
    readonly mergeFields?: Array<string | FieldPath>;
};
```
<b>References:</b> [FieldPath](./firestore_.fieldpath.md)