UploadProgress Event
Fired while the class is uploading files to the URL .
Syntax
webupload.on('UploadProgress', listener: (e: {readonly percentDone: number}) => void )
Remarks
The PercentDone parameter shows the progress of the upload. The event is fired at least once at the beginning of the transfer, and once at the end of the transfer. The respective values for PercentDone are 0 and 100.