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
A MIDIConnectionEvent. Inherits from Event.
Event properties
MIDIConnectionEvent.portRead only-
Returns a reference to a
MIDIPortinstance 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 |
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| Web MIDI API # dom-midiport-onstatechange |
Browser compatibility
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statechange event
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Legend
Tip: you can click/tap on a cell for more information.
- Full support
- Full support
- No support
- No support
- See implementation notes.