MIDIConnectionEvent
The MIDIConnectionEvent
interface of the Web MIDI API (en-US) is the event passed to the onstatechange
(en-US) 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
(en-US)-
创建一个新的
MIDIConnectionEvent
对象。
属性
MIDIConnectionEvent.port
(en-US)-
返回一个
MIDIPort
(en-US) 实例的引用,指明其端口是否已经连接。
举例
规范
Specification |
---|
Web MIDI API # midiconnectionevent-interface |
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