MIDIAccess.onstatechange

The onstatechange Event Handler of the MIDIAccess interface processes statechange events.

The event fires when a new MIDI port is added or when an existing port changes state.

Syntax

MIDIAccess.onstatechange = function;
MIDIAccess.addEventListener('statechange', function);

Example

The Navigator.requestMIDIAccess() method returns a promise that resolves with a MIDIAccess object. When a port changes state, information about that port is printed to the console.

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

Specifications

Browser compatibility