event.phase

Overview

The phase of the network request. Will be one of the following values:

• "began" — The initial notification.
• "progress" — An intermediate progress notification, with an updated value for bytesTransferred.
• "ended" — The final notification, when the request is finished.

Note that the "began" and "progress" phase notifications will only be received if params.progress is set to "upload" or "download" in the request.

## Gotchas

On the "began" phase event:

• For "upload" progress, this notification will be received before connecting to the remote host and starting the request. It will contain the estimated upload size (bytesEstimated), if known.
• For "download" progress, this notification will be received after posting the request and receiving the response headers. It will contain the response code, headers, and estimated size (bytesEstimated), if known.