bytesTransferred

number

The number of bytes that have been successfully uploaded so far.

downloadURL

nullable string

After the upload completes, contains a long-lived download URL for the object. Also accessible in metadata.

metadata

non-null firebase.storage.FullMetadata

Before the upload completes, contains the metadata sent to the server. After the upload completes, contains the metadata sent back from the server.

ref

non-null firebase.storage.Reference

The reference that spawned this snapshot's upload task.

state

firebase.storage.TaskState

The current state of the task.

task

non-null firebase.storage.UploadTask

The task of which this is a snapshot.

totalBytes

number

The total number of bytes to be uploaded.