Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The USBOutTransferResult interface of the WebUSB API provides the result from a call to the transferOut() and controlTransferOut() methods of the USBDevice interface. It represents the result from requesting a transfer of data from the USB host to the USB device.


USBOutTransferResult() Experimental

Creates a new USBOutTransferResult object with the provided status and bytesWritten fields.

Instance properties

USBOutTransferResult.bytesWritten Read only Experimental

Returns the number of bytes from the transfer request that were sent to the device.

USBOutTransferResult.status Read only Experimental

Returns the status of the transfer request, one of:

  • "ok" - The transfer was successful.
  • "stall" - The device indicated an error by generating a stall condition on the endpoint. A stall on a bulk or interrupt endpoint must be cleared by calling clearHalt() before transferOut() can be called again.


# usbouttransferresult

Browser compatibility

BCD tables only load in the browser