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USBDevice.transferIn

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 transmitted to the USB device.

Syntax

var promise = USBDevice.transferIn(endpointNumber, length)

Parameters

endpointNumber: The number of a device-specific endpoint (buffer).
length: A variable to contain the length of the data 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	Status	Comment
WebUSB The definition of 'transferIn()' in that specification.	Draft	Initial definition.

Browser compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	61	No	No	No	48	No

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	No	61	No	No	48	No	No

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https://developer.mozilla.org/en-US/docs/Web/API/USBDevice/transferIn