在此页

• 构造函数
• 特性
• 规范
• 浏览器兼容性
• 相关话题

草案
此页面不完整。

安全上下文
此特征只可用于 安全上下文 (HTTPS)，在某些或所有 支持浏览器 .

USBAlternateInterface 接口在 WebUSB 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.

构造函数

USBAlternateInterface.USBAlternateInterface

创建新的 USBAlternateInterface object which will be populated with information about the alternate interface of the provided USBInterface with the given alternate setting number.

特性

USBAlternateInterface.alternateSetting 只读

Returns the alternate setting number of this interface. This is equal to the bAlternateSetting field of the interface descriptor defining this interface.

USBAlternateInterface.interfaceClass 只读

Returns the class of this interface. This is equal to the bInterfaceClass field of the interface descriptor defining this interface. Standardized values for this field are defined by the USB Implementers Forum. A value of 0xFF indicates a vendor-defined interface.

USBAlternateInterface.interfaceSubclass 只读

Returns the subclass of this interface. This is equal to the bInterfaceSubClass field of the interface descriptor defining this interface. The meaning of this value depends on the interfaceClass 字段。

USBAlternateInterface.interfaceProtocol 只读

Returns the protocol supported by this interface. This is equal to the bInterfaceProtocol field of the interface descriptor defining this interface. The meaning of this value depends on the interfaceClass and interfaceSubclass 字段。

USBAlternateInterface.interfaceName 只读

Returns 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 iInterface field of the interface descriptor defining this interface.

USBAlternateInterface.endpoints 只读

Returns an array containing instances of the USBEndpoint interface describing each of the endpoints that are part of this interface.

规范

规范	状态	注释
WebUSB The definition of 'USBAlternateInterface' in that specification.	草案	初始定义。

浏览器兼容性

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. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
USBAlternateInterface	Chrome 61	Edge 79	Firefox No	IE No	Opera 48	Safari No	WebView Android No	Chrome Android 61	Firefox Android No	Opera Android 45	Safari iOS No	Samsung Internet Android 8.0
USBAlternateInterface() 构造函数	Chrome 61	Edge 79	Firefox No	IE No	Opera 48	Safari No	WebView Android No	Chrome Android 61	Firefox Android No	Opera Android 45	Safari iOS No	Samsung Internet Android 8.0
alternateSetting	Chrome 61	Edge 79	Firefox No	IE No	Opera 48	Safari No	WebView Android No	Chrome Android 61	Firefox Android No	Opera Android 45	Safari iOS No	Samsung Internet Android 8.0
endpoints	Chrome 61	Edge 79	Firefox No	IE No	Opera 48	Safari No	WebView Android No	Chrome Android 61	Firefox Android No	Opera Android 45	Safari iOS No	Samsung Internet Android 8.0
interfaceClass	Chrome 61	Edge 79	Firefox No	IE No	Opera 48	Safari No	WebView Android No	Chrome Android 61	Firefox Android No	Opera Android 45	Safari iOS No	Samsung Internet Android 8.0
interfaceName	Chrome 61	Edge 79	Firefox No	IE No	Opera 48	Safari No	WebView Android No	Chrome Android 61	Firefox Android No	Opera Android 45	Safari iOS No	Samsung Internet Android 8.0
interfaceProtocol	Chrome 61	Edge 79	Firefox No	IE No	Opera 48	Safari No	WebView Android No	Chrome Android 61	Firefox Android No	Opera Android 45	Safari iOS No	Samsung Internet Android 8.0
interfaceSubclass	Chrome 61	Edge 79	Firefox No	IE No	Opera 48	Safari No	WebView Android No	Chrome Android 61	Firefox Android No	Opera Android 45	Safari iOS No	Samsung Internet Android 8.0

图例

完整支持

完整支持

不支持

不支持

实验。期望将来行为有所改变。

实验。期望将来行为有所改变。

元数据

• 最后修改： Jun 5, 2020

相关话题

1. USBAlternateInterface