MIDIConnectionEvent

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这是一个实验中的功能
此功能某些浏览器尚在开发中,请参考浏览器兼容性表格以得到在不同浏览器中适合使用的前缀。由于该功能对应的标准文档可能被重新修订,所以在未来版本的浏览器中该功能的语法和行为可能随之改变。

The MIDIConnectionEvent interface of the Web MIDI API is the event passed to the onstatechange event of the MIDIAccess interface and the onstatechange event of the MIDIPorts interface. This occurs any time a new port becomes available, or when a previously available port becomes unavailable. 例如,这个事件无论是在一个 MIDI 设备插入或拔出设备时都会触发。

构造函数

MIDIConnectionEvent.MIDIConnectionEvent
创建一个新的 MIDIConnectionEvent 对象。

属性

MIDIConnectionEvent.port
返回一个 MIDIPort 实例的引用,指明其端口是否已经连接。

举例

 

规范

规范 状态 备注
Web MIDI API Working Draft Initial definition.

浏览器兼容

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
MIDIConnectionEventChrome Full support 43Edge ? Firefox ? IE No support NoOpera Full support 30Safari ? WebView Android Full support 43Chrome Android Full support 43Firefox Android ? Opera Android Full support 30Safari iOS ? Samsung Internet Android Full support 4.0
MIDIConnectionEvent() constructor
Experimental
Chrome Full support 43Edge ? Firefox ? IE No support NoOpera Full support 30Safari ? WebView Android Full support 43Chrome Android Full support 43Firefox Android ? Opera Android Full support 30Safari iOS ? Samsung Internet Android ?
port
ExperimentalNon-standard
Chrome Full support 43Edge ? Firefox ? IE No support NoOpera Full support 30Safari ? WebView Android Full support 43Chrome Android Full support 43Firefox Android ? Opera Android Full support 30Safari iOS ? Samsung Internet Android ?

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.
Non-standard. Expect poor cross-browser support.
Non-standard. Expect poor cross-browser support.

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