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 insecure contexts (HTTPS), in some or allsupporting browsers.
Thestatechange event of theMIDIPort interface is fired when a port changes from open to closed, or closed to open.
Syntax
Use the event name in methods likeaddEventListener(), or set an event handler property.
js
addEventListener("statechange", (event) => { })onstatechange = (event) => { }Event type
AMIDIConnectionEvent. Inherits fromEvent.
Event properties
MIDIConnectionEvent.portRead onlyReturns a reference to a
MIDIPortinstance for a port that has been connected or disconnected.
Example
In the following example the currentMIDIPort.state is logged each time it changes.
js
port.onstatechange = (event) => { console.log(port.state);};Specifications
| Specification |
|---|
| Web MIDI API # dom-midiport-onstatechange |