USBDevice.transferIn()

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

The transferIn() method of the USBDevice interface returns a promise that resolves with a USBTransferInResult when bulk or interrupt data is received from the USB device.

Syntax

var promise = USBDevice.transferIn(endpointNumber, length)

Parameters

endpointNumber

The number of a device-specific endpoint (buffer).

length

The maximum number of bytes that will be read back from the device. The actual data is in the USBInTransferResult in the resolved Promise.

Return value

A promise that resolves with a USBTransferInResult.

Specifications

Specification
WebUSB API
# ref-for-dom-usbdevice-transferin①

Browser compatibility

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