Definition
Web MIDI API defines MIDIPort
[SecureContext, Exposed=Window] interface MIDIPort: EventTarget {
readonly attribute DOMString id;
readonly attribute DOMString? manufacturer;
readonly attribute DOMString? name;
readonly attribute MIDIPortType type;
readonly attribute DOMString? version;
readonly attribute MIDIPortDeviceState state;
readonly attribute MIDIPortConnectionState connection;
attribute EventHandler onstatechange;
Promise <MIDIPort> open();
Promise <MIDIPort> close();
};