USBDevice: transferIn() method

Limited availability

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

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

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

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

Syntax

js
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 USBInTransferResult.

Specifications

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

Browser compatibility

BCD tables only load in the browser