MIDIAccess
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
The MIDIAccess
interface of the Web MIDI API provides methods for listing MIDI input and output devices, and obtaining access to those devices.
Instance properties
MIDIAccess.inputs
Read only-
Returns an instance of
MIDIInputMap
which provides access to any available MIDI input ports. MIDIAccess.outputs
Read only-
Returns an instance of
MIDIOutputMap
which provides access to any available MIDI output ports. MIDIAccess.sysexEnabled
Read only-
A boolean attribute indicating whether system exclusive support is enabled on the current MIDIAccess instance.
Events
MIDIAccess.statechange_event
-
Called whenever a new MIDI port is added or an existing port changes state.
Examples
The Navigator.requestMIDIAccess()
method returns a promise that resolves with a MIDIAccess
object. Information about the input and output ports is returned.
When a port changes state, information about that port is printed to the console.
js
navigator.requestMIDIAccess().then((access) => {
// Get lists of available MIDI controllers
const inputs = access.inputs.values();
const outputs = access.outputs.values();
access.onstatechange = (event) => {
// Print information about the (dis)connected MIDI controller
console.log(event.port.name, event.port.manufacturer, event.port.state);
};
});
Specifications
Specification |
---|
Web MIDI API # midiaccess-interface |
Browser compatibility
BCD tables only load in the browser