MIDIPort: statechange event

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 statechange event of the MIDIPort interface is fired when a port changes from open to closed, or closed to open.

Syntax

Use the event name in methods like addEventListener(), or set an event handler property.

js
addEventListener("statechange", (event) => {});

onstatechange = (event) => {};

Event type

Event properties

MIDIConnectionEvent.port Read only

Returns a reference to a MIDIPort instance for a port that has been connected or disconnected.

Example

In the following example the current MIDIPort.state is logged each time it changes.

js
port.onstatechange = (event) => {
  console.log(port.state);
};

Specifications

Specification
Web MIDI API
# dom-midiport-onstatechange

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
statechange event

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
No support
No support
See implementation notes.