TheMIDIConnectionEvent interface of theWeb MIDI API is the event passed to thestatechange event of theMIDIAccess interface and thestatechange event of theMIDIPort interface. This occurs any time a new port becomes available, or when a previously available port becomes unavailable. For example, this event is fired whenever a MIDI device is either plugged in to or unplugged from a computer.

Constructor

MIDIConnectionEvent()

Creates a newMIDIConnectionEvent object.

Instance properties

MIDIConnectionEvent.portRead only

Returns a reference to aMIDIPort instance for a port that has been connected or disconnected.

Examples

TheNavigator.requestMIDIAccess() method returns a promise that resolves with aMIDIAccess object. When a port changes state, aMIDIConnectionEvent is passed tostatechange event. Information about the port can then be printed to the console.

navigator.requestMIDIAccess().then((access) => {  access.onstatechange = (event) => {    console.log(event.port.name, event.port.manufacturer, event.port.state);  };});

Specifications

Browser compatibility