MIDIPort: state property

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

The state read-only property of the MIDIPort interface returns the state of the port.

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

"disconnected": The device that this MIDIPort represents is disconnected from the system.
"connected": The device that this MIDIPort represents is currently connected.

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

for (const entry of midiAccess.inputs) {
  const input = entry[1];
  console.log(input.state);
}

Specification
Web MIDI API # dom-midiport-state

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