MIDIMessageEvent

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The MIDIMessageEvent interface of the Web MIDI API represents the event passed to the onmidimessage event handler of the MIDIInput interface. A midimessage event is fired every time a MIDI message is sent from a device represented by a MIDIInput, for example when a MIDI keyboard key is pressed, a knob is tweaked, or a slider is moved.

Constructor

MIDIMessageEvent.MIDIMessageEvent

Creates a new MIDIMessageEvent object instance.

Properties

This interface also inherits properties from Event.

MIDIMessageEvent.data

A Uint8Array containing the data bytes of a single MIDI message. See the MIDI specification for more information on its form.

Methods

This interface doesn't implement any specific methods, but inherits methods from Event.

Examples

The following example prints all MIDI messages to the console.

navigator.requestMIDIAccess().then(midiAccess => {
  Array.from(midiAccess.inputs).forEach(input => {
    input[1].onmidimessage = (msg) => { console.log(msg); }
  })
});

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
MIDIMessageEvent
43
79
No
No
30
No
No
43
No
30
No
4.0
MIDIMessageEvent
43
79
No
No
30
No
No
43
No
30
No
4.0
data
43
79
No
No
30
No
No
43
No
30
No
4.0

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https://developer.mozilla.org/en-US/docs/Web/API/MIDIMessageEvent