MIDIPort.open()
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
The open()
method of the MIDIPort
interface makes the MIDI device connected to this MIDIPort
explicitly available.
If the port is successfully opened a new MIDIConnectionEvent
is queued to the MIDIPort.onstatechange
and MIDIAccess.onstatechange
event handlers, and the MIDIPort.connection
property is changed to "open"
.
If the port is already open when this method is called, then the promise will resolve successfully.
Syntax
var output = midiAccess.outputs.get(portID);
output.open(); // opens the port
Parameters
None.
Return value
A Promise
which resolves once access to the port has been successfully obtained.
Exceptions
DOMException
InvalidAccessError
-
The promise is rejected with this error if the port is unavailable and cannot be opened.
Examples
The following example shows an output port being opened.
var output = midiAccess.outputs.get(portID);
output.open(); // opens the port
Specifications
Specification |
---|
Web MIDI API # dom-midiport-open |
Browser compatibility
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