voluptasmollitia/docs-exp/storage.uploadtasksnapshot.md

Monorepo for the Firebase JavaScript SDK

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[Home](./index.md) &gt; [@firebase/storage](./storage.md) &gt; [UploadTaskSnapshot](./storage.uploadtasksnapshot.md)

## UploadTaskSnapshot interface

Holds data about the current state of the upload task.

<b>Signature:</b>

```typescript
export interface UploadTaskSnapshot 
```

## Properties

|  Property | Type | Description |
|  --- | --- | --- |
|  [bytesTransferred](./storage.uploadtasksnapshot.bytestransferred.md) | number | The number of bytes that have been successfully uploaded so far. |
|  [metadata](./storage.uploadtasksnapshot.metadata.md) | [FullMetadata](./storage.fullmetadata.md) | Before the upload completes, contains the metadata sent to the server. After the upload completes, contains the metadata sent back from the server. |
|  [ref](./storage.uploadtasksnapshot.ref.md) | [StorageReference](./storage.storagereference.md) | The reference that spawned this snapshot's upload task. |
|  [state](./storage.uploadtasksnapshot.state.md) | [TaskState](./storage.taskstate.md) | The current state of the task. |
|  [task](./storage.uploadtasksnapshot.task.md) | [UploadTask](./storage.uploadtask.md) | The task of which this is a snapshot. |
|  [totalBytes](./storage.uploadtasksnapshot.totalbytes.md) | number | The total number of bytes to be uploaded. |