USBAlternateInterface
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
Experimental:This is anexperimental technology
Check theBrowser compatibility table carefully before using this in production.
Secure context: This feature is available only insecure contexts (HTTPS), in some or allsupporting browsers.
Note: This feature is available inWeb Workers.
TheUSBAlternateInterface interface of theWebUSB API provides information about a particular configuration of an interface provided by the USB device. An interface includes one or more alternate settings which can configure a set of endpoints based on the operating mode of the device.
Constructor
USBAlternateInterface()ExperimentalCreates a new
USBAlternateInterfaceobject which will be populated with information about the alternate interface of the providedUSBInterfacewith the given alternate setting number.
Instance properties
USBAlternateInterface.alternateSettingRead onlyExperimentalReturns the alternate setting number of this interface. This is equal to the
bAlternateSettingfield of the interface descriptor defining this interface.USBAlternateInterface.interfaceClassRead onlyExperimentalReturns the class of this interface. This is equal to the
bInterfaceClassfield of the interface descriptor defining this interface.Standardized values for this field are defined by the USB Implementers Forum. A value of0xFFindicates a vendor-defined interface.USBAlternateInterface.interfaceSubclassRead onlyExperimentalReturns the subclass of this interface. This is equal to the
bInterfaceSubClassfield of the interface descriptor defining this interface. The meaning of this value depends on theinterfaceClassfield.USBAlternateInterface.interfaceProtocolRead onlyExperimentalReturns the protocol supported by this interface. This is equal to the
bInterfaceProtocolfield of the interface descriptor defining this interface. The meaning of this value depends on theinterfaceClassandinterfaceSubclassfields.USBAlternateInterface.interfaceNameRead onlyExperimentalReturns the name of the interface, if one is provided by the device. This is the value of the string descriptor with the index specified by the
iInterfacefield of the interface descriptor defining this interface.USBAlternateInterface.endpointsRead onlyExperimentalReturns an array containing instances of the
USBEndpointinterface describing each of the endpoints that are part of this interface.
Specifications
| Specification |
|---|
| WebUSB API # usbalternateinterface |
Browser compatibility
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