MIDIConnectionEvent

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

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实验性: 这是一项实验性技术
在将其用于生产之前，请仔细检查浏览器兼容性表格。

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

Specification
Web MIDI API
# midiconnectionevent-interface

浏览器兼容性

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