USBDevice.transferOut() - Web APIs
the transferout() method of the usbdevice interface returns a promise that resolves with a usbtransferoutresult when bulk or interrupt data is sent to the usb device.
... return value a promise that resolves with a usbtransferoutresult.

USBDevice - Web APIs
usbdevice.controltransferout() returns a promise that resolves with a usbtransferoutresult when a command or status operation has been transmitted from the usb device.
... usbdevice.transferout() returns a promise that resolves with a usbtransferoutresult when bulk or interrupt data is sent to the usb device.

Index - Web APIs
4426 usbdevice.transferout() api, method, reference, usb, usbdevice, webusb, webusb api, transferout the transferout() method of the usbdevice interface returns a promise that resolves with a usbtransferoutresult when bulk or interrupt data is transmitted from the usb device.