veritatisdoloremque/docs-exp/storage-types.settablemetadata.custommetadata.md

Monorepo for the Firebase JavaScript SDK

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[Home](./index.md) &gt; [@firebase/storage-types](./storage-types.md) &gt; [SettableMetadata](./storage-types.settablemetadata.md) &gt; [customMetadata](./storage-types.settablemetadata.custommetadata.md)

## SettableMetadata.customMetadata property

Additional user-defined custom metadata.

<b>Signature:</b>

```typescript
customMetadata?:
    | {
        [key: string]: string;
      }
    | undefined;
```