veritatisdoloremque/docs-exp/functions-types.functions.md

Monorepo for the Firebase JavaScript SDK

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[Home](./index.md) &gt; [@firebase/functions-types](./functions-types.md) &gt; [Functions](./functions-types.functions.md)

## Functions interface

`Functions` represents a Functions instance, and is a required argument for all Functions operations.

<b>Signature:</b>

```typescript
export interface Functions 
```

## Properties

|  Property | Type | Description |
|  --- | --- | --- |
|  [app](./functions-types.functions.app.md) | [FirebaseApp](./app-types.firebaseapp.md) | The FirebaseApp this Functions instance is associated with. |
|  [customDomain](./functions-types.functions.customdomain.md) | string \| null | A custom domain hosting the callable Cloud Functions. ex: https://mydomain.com |
|  [region](./functions-types.functions.region.md) | string | The region the callable Cloud Functions are located in. Default is <code>us-central-1</code>. |