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    Interface MIDIOutput

    The MIDIOutput interface of the Web MIDI API provides methods to add messages to the queue of an output device, and to clear the queue of messages. Available only in secure contexts.

    MDN Reference

    interface MIDIOutput {
        connection: MIDIPortConnectionState;
        id: string;
        manufacturer: string | null;
        name: string | null;
        onstatechange: ((this: MIDIPort, ev: MIDIConnectionEvent) => any) | null;
        state: MIDIPortDeviceState;
        type: MIDIPortType;
        version: string | null;
        addEventListener<K extends "statechange">(
            type: K,
            listener: (this: MIDIOutput, ev: MIDIPortEventMap[K]) => any,
            options?: boolean | AddEventListenerOptions,
        ): void;
        addEventListener(
            type: string,
            listener: EventListenerOrEventListenerObject,
            options?: boolean | AddEventListenerOptions,
        ): void;
        close(): Promise<MIDIPort>;
        dispatchEvent(event: Event): boolean;
        open(): Promise<MIDIPort>;
        removeEventListener<K extends "statechange">(
            type: K,
            listener: (this: MIDIOutput, ev: MIDIPortEventMap[K]) => any,
            options?: boolean | EventListenerOptions,
        ): void;
        removeEventListener(
            type: string,
            listener: EventListenerOrEventListenerObject,
            options?: boolean | EventListenerOptions,
        ): void;
        send(data: number[], timestamp?: number): void;
        send(data: Iterable<number>, timestamp?: number): void;
    }

    Hierarchy (View Summary)

    Index

    Properties

    connection id manufacturer name onstatechange state type version

    Methods

    addEventListener close dispatchEvent open removeEventListener send

    Properties

    connection: MIDIPortConnectionState

    The connection read-only property of the MIDIPort interface returns the connection state of the port.

    MDN Reference

    id: string

    The id read-only property of the MIDIPort interface returns the unique ID of the port.

    MDN Reference

    manufacturer: string | null

    The manufacturer read-only property of the MIDIPort interface returns the manufacturer of the port.

    MDN Reference

    name: string | null

    The name read-only property of the MIDIPort interface returns the system name of the port.

    MDN Reference

    onstatechange: ((this: MIDIPort, ev: MIDIConnectionEvent) => any) | null

    MDN Reference

    state: MIDIPortDeviceState

    The state read-only property of the MIDIPort interface returns the state of the port.

    MDN Reference

    type: MIDIPortType

    The type read-only property of the MIDIPort interface returns the type of the port, indicating whether this is an input or output MIDI port.

    MDN Reference

    version: string | null

    The version read-only property of the MIDIPort interface returns the version of the port.

    MDN Reference

    Methods

    • The close() method of the MIDIPort interface makes the access to the MIDI device connected to this MIDIPort unavailable.

      MDN Reference

      Returns Promise<MIDIPort>

    • The dispatchEvent() method of the EventTarget sends an Event to the object, (synchronously) invoking the affected event listeners in the appropriate order. The normal event processing rules (including the capturing and optional bubbling phase) also apply to events dispatched manually with dispatchEvent().

      MDN Reference

      Parameters

      Returns boolean

    • The open() method of the MIDIPort interface makes the MIDI device connected to this MIDIPort explicitly available.

      MDN Reference

      Returns Promise<MIDIPort>

    • The removeEventListener() method of the EventTarget interface removes an event listener previously registered with EventTarget.addEventListener() from the target. The event listener to be removed is identified using a combination of the event type, the event listener function itself, and various optional options that may affect the matching process; see Matching event listeners for removal.

      MDN Reference

      Type Parameters

      • K extends "statechange"

      Parameters

      Returns void

    • The removeEventListener() method of the EventTarget interface removes an event listener previously registered with EventTarget.addEventListener() from the target. The event listener to be removed is identified using a combination of the event type, the event listener function itself, and various optional options that may affect the matching process; see Matching event listeners for removal.

      MDN Reference

      Parameters

      Returns void

    • The send() method of the MIDIOutput interface queues messages for the corresponding MIDI port. The message can be sent immediately, or with an optional timestamp to delay sending.

      MDN Reference

      Parameters

      • data: number[]
      • Optionaltimestamp: number

      Returns void

    • The send() method of the MIDIOutput interface queues messages for the corresponding MIDI port. The message can be sent immediately, or with an optional timestamp to delay sending.

      MDN Reference

      Parameters

      • data: Iterable<number>
      • Optionaltimestamp: number

      Returns void

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