Web/API/USBInterface

Draft This page is not complete.

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

The USBInterface interface of the WebUSB API provides information about an interface provided by the USB device. An interface represents a feature of the device which implements a particular protocol and may contain endpoints for bidirectional communication.

Constructor

USBInterface.USBInterface

Creates a new USBInterface object which will be populated with information about the interface on the provided USBConfiguration with the given interface number.

Properties

USBInterface.interfaceNumberRead only

Returns the interface number of this interface. This is equal to the bInterfaceNumber field of the interface descriptor defining this interface.

USBInterface.alternateRead only

Returns the currently selected alternative configuration of this interface. By default this is the USBAlternateInterface from alternates with alternateSetting equal to 0. It can be changed by calling USBDevice.selectAlternateInterface() with any other value found in alternates.

USBInterface.alternatesRead only

Returns an array containing instances of the USBAlternateInterface interface describing each of the alternative configurations possible for this interface.

USBInterface.claimedRead only

Returns whether or not this interface has been claimed by the current page by calling USBDevice.claimInterface().

Specifications

Specification	Status	Comment
WebUSBThe definition of 'USBInterface' in that specification.	Draft	Initial definition.

Browser compatibility

The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
USBInterface Experimental'	Chrome Full support 61	Edge Full support 79	Firefox No support No	IE No support No	Opera Full support 48	Safari No support No	WebView Android No support No	Chrome Android Full support 61	Firefox Android No support No	Opera Android Full support 45	Safari iOS No support No	Samsung Internet Android Full support 8.0
USBInterface() constructor Experimental'	Chrome Full support 61	Edge Full support 79	Firefox No support No	IE No support No	Opera Full support 48	Safari No support No	WebView Android No support No	Chrome Android Full support 61	Firefox Android No support No	Opera Android Full support 45	Safari iOS No support No	Samsung Internet Android Full support 8.0
alternate Experimental'	Chrome Full support 61	Edge Full support 79	Firefox No support No	IE No support No	Opera Full support 48	Safari No support No	WebView Android No support No	Chrome Android Full support 61	Firefox Android No support No	Opera Android Full support 45	Safari iOS No support No	Samsung Internet Android Full support 8.0
alternates Experimental'	Chrome Full support 61	Edge Full support 79	Firefox No support No	IE No support No	Opera Full support 48	Safari No support No	WebView Android No support No	Chrome Android Full support 61	Firefox Android No support No	Opera Android Full support 45	Safari iOS No support No	Samsung Internet Android Full support 8.0
claimed Experimental'	Chrome Full support 61	Edge Full support 79	Firefox No support No	IE No support No	Opera Full support 48	Safari No support No	WebView Android No support No	Chrome Android Full support 61	Firefox Android No support No	Opera Android Full support 45	Safari iOS No support No	Samsung Internet Android Full support 8.0
interfaceNumber Experimental'	Chrome Full support 61	Edge Full support 79	Firefox No support No	IE No support No	Opera Full support 48	Safari No support No	WebView Android No support No	Chrome Android Full support 61	Firefox Android No support No	Opera Android Full support 45	Safari iOS No support No	Samsung Internet Android Full support 8.0

Legend

Full support  

Full support

No support  

No support

Experimental. Expect behavior to change in the future.'

Experimental. Expect behavior to change in the future.

USBInterface by Mozilla Contributors is licensed under CC-BY-SA 2.5.