MIDIPort.type

The type read-only property of the MIDIPort interface returns the type of the port, indicating whether this is an input or output MIDI port.

A string containing the type of the port, one of:

"input"

The MIDIPort is an input port.

"output"

The MIDIPort is an output port.

The following example loops through all input ports and prints the type of each to the console.

for (let entry of midiAccess.inputs) {
  let input = entry[1];
  console.log(input.type); // should always be input
}