USBInterface

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

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
USBInterface	61	79	No	No	48	No	No	61	No	45	No	8.0
USBInterface	61	79	No	No	48	No	No	61	No	45	No	8.0
alternate	61	79	No	No	48	No	No	61	No	45	No	8.0
alternates	61	79	No	No	48	No	No	61	No	45	No	8.0
claimed	61	79	No	No	48	No	No	61	No	45	No	8.0
interfaceNumber	61	79	No	No	48	No	No	61	No	45	No	8.0