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The MIDIMessageEvent() constructor creates a new MIDIMessageEvent object. Typically this constructor is not used as events are created when a MIDIInput finishes receiving one or more MIDI messages.
new MIDIMessageEvent(type)
new MIDIMessageEvent(type, options)typeA string with the name of the event. It is case-sensitive and browsers always set it to MIDIMessageEvent.
options OptionalAn object that, in addition of the properties defined in Event(), can have the following properties:
dataA Uint8Array instance containing the data bytes of the MIDI message.
A new MIDIMessageEvent object.