voluptasmollitia/docs-exp/app.firebaseoptions.messagingsenderid.md

Monorepo for the Firebase JavaScript SDK

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[Home](./index.md) &gt; [@firebase/app](./app.md) &gt; [FirebaseOptions](./app.firebaseoptions.md) &gt; [messagingSenderId](./app.firebaseoptions.messagingsenderid.md)

## FirebaseOptions.messagingSenderId property

<b>Signature:</b>

```typescript
messagingSenderId?: string;
```